2008 GMC Sierra 1500 Reviews, Ratings, Prices - Consumer Reports
This full-sized pickup truck is the Chevrolet Silverado's twin. The Sierra retains the previous model's selectable, full-time, four-wheel-drive system and a generous load capacity. Electronic stability control is standard in the crew-cab model but optional in the extended cab. The new truck has more responsive handling and a steadier ride, but the 5.3-liter V8 isn't very refined.
Alerts
There are 2 recalls on this vehicle. Learn More.

Road Test Results

Performance
Acceleration Acceleration Acceleration tests are conducted on a smooth, flat pavement straightaway at the track. Time, speed, and distance measurements are taken with a precise GPS-based device that’s hooked to a data-logging computer.
NA
0 to 60 mph 0 to 60 mph (sec.) The time in seconds that a vehicle takes to reach 60 mph from a standstill with the engine idling.
Transmission Transmission Transmission performance is determined by shifting smoothness, response, shifter action, and clutch actuation for manual transmissions.
NA
Braking Braking The braking rating is a composite of wet and dry stopping distances and pedal feel. Braking distance is from 60 mph, with no wheels locked.
NA
Emergency Handling Emergency Handling Several factors go into the rating, including the avoidance maneuver speed and confidence, as well as how the vehicle behaves when pushed to its limit.
NA
Comfort / Convenience
Ride Ride Our expert judgment of how well the suspension isolates and absorbs road imperfections and how steady it keeps the body on various road surfaces.
NA
Noise Noise Our expert judgment of the vehicle's interior noise level in everyday driving.
NA
Front Seat Comfort Front Seat Comfort Our judgment of how comfortable the front seat is for drivers of various heights.
NA
Rear Seat Comfort Rear Seat Comfort Our judgment of how comfortable the rear seat is for two passengers to sit across.
NA
Interior Fit and Finish Interior Fit and Finish An expert evaluation of the interior quality and craftsmanship.
NA
Trunk/Cargo Area Trunk/Cargo Area Our rating is based on the amount of luggage or cargo space that a vehicle has in the trunk or cargo area.
NA
Fuel Economy & Emissions
Fuel Economy Fuel Economy We perform our own fuel-economy tests, independent of the government's often-quoted EPA figures and the manufacturers' claims. Using a precise fuel-flow measuring device spliced into the fuel line, we run two separate circuits to represent city and highway consumption.
NA
CR's Overall Mileage CR's Overall Mileage CR's overall mileage is a composite of measured fuel usage on a prescribed city course and highway cruising; and CR's 150-mile test trip of mixed driving, if tested. In recent road tests, we've discontinued the 150-mile trip test.
CR's City Mileage CR's City Mileage Measured fuel usage on a prescribed city course.
CR's Highway Mileage CR's Highway Mileage Measured fuel usage on a prescribed highway cruising.
Annual Fuel Cost Annual Fuel Cost The cost and amount of fuel used in 12,000 miles and is calculated from CR's overall mileage.
Greenhouse Gas Greenhouse Gas The Greenhouse Gas Rating represents the amount of carbon dioxide the vehicle emits compared to other vehicles of the same model year. This score from the EPA ranges from 1 (worst) to 10 (best).
NA
Smog Rating Smog Rating The Smog Rating represents the amount of health-damaging and smog-forming airborne pollutants the vehicle emits compared to other vehicles of the same model year. This score from the EPA ranges from 1 (worst) to 10 (best).
NA

Owner Reports

Worse Better
Reliability History Reliability History The reliability charts are based on responses on hundreds of thousands of vehicles from our latest Annual Auto Survey. Consumer Reports subscribers reported on any serious problems they had with their vehicles during the past 12 months that they considered serious because of cost, failure, safety, or downtime, in any of the trouble spots included in the table below. The results are presented relative to the average model that year. Extra weight is given to the more serious areas such as major engine or transmission problems. Based on this data and further analysis, we predict reliability for the latest year. N/A indicates that we did not receive a large enough sample size to provide data for a specific year. An X indicates that the vehicle was not manufactured for a specific year.
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Reliability Trouble Spots
Engine Major Engine Major Engine rebuild or replacement, cylinder head, head gasket, turbo or supercharger, timing chain or timing belt.
Engine Minor Engine Minor Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, oil leaks.
Engine Cooling Engine Cooling Radiator, cooling fan, antifreeze leaks, water pump, thermostat, overheating.
Transmission Major Transmission Major Transmission rebuild or replacement, torque converter, clutch replacement.
Transmission Minor Transmission Minor Gear selector or linkage, leaks, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission.
Drive System Drive System Driveshaft or axle, CV joint, differential, transfer case, 4WD/AWD components, driveline vibration, traction control, electronic stability control (ESC), electrical failure.
Owner Satisfaction Owner Satisfaction To learn about satisfaction, CR has collected survey data from our annual survey on more than half a million vehicles. Our subscribers provide great insights into their satisfaction by answering one simple question: If they had it to do all over again, would they definitely buy or lease the same model? In addition, respondents also rate their cars in six categories: driving experience, comfort, value, styling, audio, and climate systems. N/A indicates that we did not receive a large enough sample size to provide data for a specific year. An X indicates that the vehicle was not manufactured for a specific year.
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Driving Experience Driving Experience Includes acceleration and handling
Comfort Comfort Includes seats, climate control, noise, and ride
Value Value Did you get what you wanted relative to the price you paid?
Styling Styling How it looks inside and out
Safety Equipment
ABS standard. Head protection air bags and ESC standard from 2010. Side air bags standard from 2010.
Model Summary
This full-sized pickup truck is the Chevrolet Silverado's twin. The Sierra retains the previous model's selectable, full-time, four-wheel-drive system and a generous load capacity. Electronic stability control is standard in the crew-cab model but optional in the extended cab. The new truck has more responsive handling and a steadier ride, but the 5.3-liter V8 isn't very refined. The interior has been significantly improved, with better fit and finish, and the Denali is a luxurious version that can be had with permanent AWD. A six-speed automatic and 6.2-liter V8 are new for 2009, as is the Sierra hybrid version.
Seating
2 front, 3 rear
Drive Wheels
4WD, AWD, Rear
Warranty
Coverage varies among versions of this vehicle

In most cases, automotive warranties are based on the vehicle identification number (VIN), and the warranty will be valid regardless of ownership. The dealership can tell you exactly how much warranty is left.

Read more about extended warranties
Body Styles
extended cab
regular cab
crew cab
Transmissions Available
  • 6-speed Automatic
  • 4-speed Automatic
Engines Available
  • 4.3-liter V6 (195 hp)
  • 4.8-liter V8 (295 hp)
  • 5.3-liter V8 (315 hp)
  • 6-liter V8 (367 hp)
  • 6.2-liter V8 (403 hp)

Owner Reported Trouble Spots

The Reliability score is based on our latest subscriber survey of 2008 GMC Sierra 1500 owners. The owner comments describe problems respondents experienced with this vehicle.

Electric System

Alternator, starter, hybrid battery and related systems, regular battery, battery cables, engine harness, coil, ignition switch, electronic ignition, distributor or rotor failure, spark plugs and wires failure.

What Owners Say

Alarm or security system (excluding aftermarket systems)

"I guess it was factory installed as it was installed by dealer at purchase... Beck and Masten in Houston Texas. It was not installed properly and had splice wires under the hood that evenutally caused the entire auto to shut down. The mechanic traced by finally to the alarm wiring. $1700 as it blew up two computers. I will never by another GMC vehicle again, and defintely will not buy a new one"

Erskine P., TX (2008 GMC Sierra 1500 SLT 4.8-L V8)
Body control module

"All Bus communication failure, no dash read outs, or door locks and window operation. It was actually a broken ground wire in LH door hinge area that caused the failure"

Margaret W., MB (2008 GMC Sierra 1500 SLE 6.0-L V8)
Cruise control

"Does not work"

Steve S., ME (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Brake pedal switch failed causing problems with the cruise control, remote start and dash warning lights"

Len H., BC (2008 GMC Sierra 1500 SLE 5.3-L V8)

"I had to have the brake switch replaced as it was causing my cruise control to drop out"

Anonymous, AZ (2008 GMC Sierra 1500 Denali 6.2-L V8)
Exterior lights (other than headlights)

"Rear tail light assymbly leaks due to poor seal"

Anonymous, CA (2008 GMC Sierra 1500 SLE 4.8-L V8)

"When in reverse the backup lights do not come on - they are functioning when the vehicle is turned off and all lights turn on."

Anonymous, NC (2008 GMC Sierra 1500 SLE 5.3-L V8)

"The module that the tail light pig tail plugs into has a loose connection. It took quite some time to figure out where the problem was"

Anonymous, TX (2008 GMC Sierra 1500 Denali 6.2-L V8)
Gauges

"The gasoline sensor in the tank gives off an incorrect reading to the gas gauge. The dealer told me that it would cost $1,300 to drop the gas tank and replace the sensor."

H S., CA (2008 GMC Sierra 1500 Denali 6.2-L V8)

"gauges went haywire, became unreliable"

Fred D., NJ (2008 GMC Sierra 1500 WT 4.3-L V6)
Heated or cooled seats

"Not reliable will not run for more than 2 minutes max. And as short as 5 sec. This is the second time this problem has occurred and now they tell me it's a 600 dollar fix. Not happy"

Anonymous, ON (2008 GMC Sierra 1500 Denali 6.2-L V8)

"Can't say too much, it's an intermittent problem where it either turns on and off a little while later, or doesn't. This refers to both the driver and passenger seats."

Anonymous, VA (2008 GMC Sierra 1500 SLT 5.3-L V8)

"Heating elements failed in both driver and passenger Front seats and had to be replaced with new."

Anonymous, MT (2008 GMC Sierra 1500 SLT 6.2-L V8)
Keyless entry

"Unable to lock the doors or start the vehicle due to fact of the all the electronic door modules malfunction. Doors are suppose to lock once you take the vehicle out of Park. Also does not lock the doors. Unsafe for our grandchild in the vehicle"

Dennis F., WA (2008 GMC Sierra 1500 SLT 5.3-L V8)

"The remote fob does not operate the driver side door lock now. The dealer estimated a cost of over $1000.00 to fix it. I declined. so I now have to manually lock/unlock the drivers door"

Anonymous, TX (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Both electric door lock actuators have gone out. With in the first 4 years"

Lawrence G., TX (2008 GMC Sierra 1500 WT 4.3-L V6)

"driver door lock actuator has failed"

E B., AB (2008 GMC Sierra 1500 SLE 5.3-L V8)
Remote engine starter

"won't start because sensor is on"

Anonymous, ON (2008 GMC Sierra 1500 SLT 5.3-L V8)

"Remote starter does not work, due to the fact that I cannot lock the doors as all the electronic door lock modules are defective. A problem that GM has know for years but fails to fix on these models. Dealership also ignored the problem"

Dennis F., WA (2008 GMC Sierra 1500 SLT 5.3-L V8)

"would NOT START REMOTELY. also WOULD NOT START AT ALL. problem WITH THE PLACE WHERE YOU PUT THE KEY IN TO START. NOTHING WOULD HAPPEN"

Tim H., TX (2008 GMC Sierra 1500 SLE 5.3-L V8)
Tire pressure monitor

"repllaced one , then second failed . cost to much to fix, one was enough"

Anonymous, FL (2008 GMC Sierra 1500 SLE 5.3-L V8)

"This feature is terrible. Too sensitive and you can't remove the warning without fixing the problem. I would be happy just to remove the warning and not fix the problem of a broken monitor"

Anonymous, ON (2008 GMC Sierra 1500 Denali 6.2-L V8)

"light would not go off eve with good pressure. decided not worth the money to repair"

Anonymous, NM (2008 GMC Sierra 1500 SLT 5.3-L V8)

"I have had this problem for quite some time. Took it into the shop to reset the monitor but that was not a permanent fix and the check tire pressure monitor stays on. My tire pressure has been checked repeatedly and it is fine."

Anonymous, CT (2008 GMC Sierra 1500 SLT 5.3-L V8)

"Right rear tire pressure monitor continually indicates low Tire pressure."

Anonymous, MT (2008 GMC Sierra 1500 SLT 6.2-L V8)
Warning lights

"on when cold weather"

Anonymous, ON (2008 GMC Sierra 1500 SLT 5.3-L V8)

Paint/Trim

Paint (fading, chalking, cracking, or peeling), loose interior and exterior trim or moldings, rust.

What Owners Say

Loose exterior trim or moldings

"Trim on the passenger door started coming loose. Self repaired the issue easily"

Charles M., ID (2008 GMC Sierra 1500 SLE 5.3-L V8)

"door mouldings on exterior fall off"

Anonymous, ON (2008 GMC Sierra 1500 SLT 5.3-L V8)

"Factory glue does not hold. Had them repaired twice at dealer. Finally did it myself with SUPER GLUE"

Howard R., TN (2008 GMC Sierra 1500 SLT 5.3-L V8)

"loose outside trim-? how to fix"

Anonymous, MI (2008 GMC Sierra 1500)

"The adhesive on the protective door trim failed"

Anonymous, CA (2008 GMC Sierra 1500 SLT 5.3-L V8)
Loose interior trim or moldings

"The plastic dashboard is breaking apart while just sitting still in the driveway most of the time (I find fragments of the dash in my floorboard when I enter the vehicle). My concern is if the passenger side airbag deploys, it could send fragments of plastic that is deteriorating flying through the air and strike anyone in the truck. The driver's side airbag should not do this since it is in the steering column, but I did receive a recall notice on my airbags over a year ago and was told that"

Lindsey S., TX (2008 GMC Sierra 1500 SLE 5.3-L V8)
Paint (fading, chalking, cracking, or peeling)

"Thin clear coat led to excessive front end chips"

Anonymous, NJ (2008 GMC Sierra 1500 SLT 5.3-L V8)

"Discoloration On trim only"

Anonymous, CA (2008 GMC Sierra 1500 SLT 5.3-L V8)

"The clear coat began peeling after 6 years of ownership and the paint is fading due to sun exposure. I own several GMC vans in my business and they All have the exterior paint peeling troubles after 6 to 7 years in the sun."

Vickie O., CA (2008 GMC Sierra 1500 Denali 6.2-L V8)

"Clear coat is pealing off"

Lindsey S., TX (2008 GMC Sierra 1500 SLE 5.3-L V8)

"The overcoat is coming off on the hood and the top of the cab"

Lindsey S., TX (2008 GMC Sierra 1500 SLE 5.3-L V8)

"clear coat chipping on truck bed"

Ronald M., IL (2008 GMC Sierra 1500 WT 4.3-L V6)
Rust

"The entire underside of this truck began to rust after only one year. I have replaced all of the brake parts three times. Now the brake lines are rusted through and several other major parts, as well as the wheel supports. Latest repair bill $3500!,"

Anonymous, VT (2008 GMC Sierra 1500 SLE 5.3-L V8)

"paint bubbling and popping off over both rear wheel wells"

Anonymous, NE (2008 GMC Sierra 1500 SLT 5.3-L V8)

"rear inner fender rusting to outside - left only"

William B., NH (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Rust over rear fender panels. Most disappointing in a modern vehicle."

Anonymous, BC (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Our GMC Sierra and every other one we have seen older than 10 years has rusted quarter panels and running boards."

Anonymous, (2008 GMC Sierra 1500 SLT 5.3-L V8)

"Rocker Panels"

Anonymous, (2008 GMC Sierra 1500 Unsure Unsure)

"wheel well rust; very expensive to fix"

Anonymous, MI (2008 GMC Sierra 1500)

"rocker panels and rear wheel wells"

David J., NL (2008 GMC Sierra 1500 SLE 5.3-L V8)

In-car Electronics

CD or DVD players, radio, speakers, GPS, communication system (e.g., OnStar), display screen freezes or goes blank, phone pairing (e.g. Bluetooth), voice control commands, steering wheel controls, portable music device interface (e.g., iPod/MP3 player), backup or other camera/sensors.

What Owners Say

Backup or other camera/sensors

"Tire pressure sensor is unreliable below 35 degrees F. The sensor incorrectly indicates low tire pressure on several tires."

Anonymous, MO (2008 GMC Sierra 1500 WT 4.8-L V8)
CD player

"started at approx. 10 yrs old. replaced with aftermarket last month"

Anonymous, WA (2008 GMC Sierra 1500 SLT 5.3-L V8)

"CD player is part of the Navigation Audio System. The navigation system has failed twice. Dealer said it could not be repaired and replaced it at cost $1500. Two years later it failed again. Now the CD player is going bad and working only off and on. Bundling these systems was a bad idea especially since the unit could not be repaired only replaced at a cost of approximately $2800."

Anonymous, CA (2008 GMC Sierra 1500 Denali 6.2-L V8)
In-dash navigation system (GPS)

"loses memory when car is shut off. I actually have to tell it its in Florida each time I use it. It defaults to Washington DC . CD memory works ok"

Anonymous, FL (2008 GMC Sierra 1500 Denali 6.2-L V8)

"at about 35,00 miles the Navigation Audio System 2/touch screen, CD/MP3 Format (replaced STD/OPT Radio went). The whole system went down. The dealer/manufacturer didn't offer repair, only replacement at $2,900 and was not on warranty. This system includes the radio/CD player as well. Had dealer do ALL maintenance and complained so loudly they convinced GMC to sell it to me for cost!? $1500. I had no choice so went with it. The navigation system failed two years later and now having problems with my CD player. It just quit working several months ago and started up again after a couple weeks, worked for 708 weeks. Now it's not working again. Also: transmission shift slow (as though slipping) has done so since new. Dealer said there was nothing wrong with it (irritating but not a deal killer. Have replaced (4) door handles (3) driver door one rear door handle."

Anonymous, CA (2008 GMC Sierra 1500 Denali 6.2-L V8)
Radio

"Radio intermitantly powers only 2 of 6 speakers"

Anonymous, CA (2008 GMC Sierra 1500 SLE 4.8-L V8)

"Lost volumne"

Deborah W., TX (2008 GMC Sierra 1500)

"The radio will come on rarely and I seldom ever listen to it. It has probably been played no more than three hours during the lifetime of my truck. To my surprise, it did play once last month when my son turned it on, but when I turned it on a week later it wouldn't play again"

Lindsey S., TX (2008 GMC Sierra 1500 SLE 5.3-L V8)
Speakers

"right channel dropped out / lower volume. came back after hitting bump in road"

Anonymous, MO (2008 GMC Sierra 1500 WT 4.8-L V8)

"THE Speakers in front has a short or something as they only come on maybe 20% of time"

Erskine P., TX (2008 GMC Sierra 1500 SLT 5.3-L V8)

"Driver's side speaker quit working after a couple of years. Warranty covered it. Passenger side speaker is now intermittent"

Michael M., OH (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Left door speaker intemittently goes out (85% of time) results in loss of stereo and also reminder chime for seat belts, keys, etc"

Jeffrey J., MI (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Speaker sound goes in and out in all but one speaker. I have always gotten sound (so far) but it is annoying that I am not getting stereo sound."

Anonymous, MO (2008 GMC Sierra 1500 WT 4.8-L V8)

"They sound terrible"

Anonymous, IL (2008 GMC Sierra 1500 4.3-L V6)
Steering wheel controls

"the radio controls sometimes switch around and don't always do what they are labeled to do but after you turn the ignition off and start over they might start operating properly"

Anonymous, IN (2008 GMC Sierra 1500 SLT 5.3-L V8)

Brakes

Antilock system (ABS), parking brake, master cylinder, calipers, rotors, pulsation or vibration, squeaking, brake failure or wear.

What Owners Say

Antilock system (ABS)

"front brake drag"

Anonymous, LA (2008 GMC Sierra 1500 WT 4.8-L V8)
Calipers

"Caliper came loose on right front wheel and caused brakes to fail. Had to have vehicle towed to dealer for repair. Not under warranty"

Lyle A., CO (2008 GMC Sierra 1500 SLE 5.3-L V8)

"replaced calipers"

Gary H., AL (2008 GMC Sierra 1500 SLT 5.3-L V8)
Normal routine brake wear

"Broken spring in rear brake caused wheel to lock up"

Anonymous, NL (2008 GMC Sierra 1500 SLE 5.3-L V8)

"brake pads were VERY expensive."

Anonymous, MI (2008 GMC Sierra 1500 SLT 5.3-L V8)

"after 60000 km driven brakes needed new pads shoes and discs"

E B., AB (2008 GMC Sierra 1500 SLE 5.3-L V8)
Premature brake wear

"Brakes are constantly rusting out and seizing up. Brake fluid lines rust through as well, leading to a sudden loss of braking ability. The first time it was only 2 years old"

Anonymous, VT (2008 GMC Sierra 1500 SLE 5.3-L V8)

"2 sets of brakes and rotors in 80,000 miles. I am not hard on brakes. Got 70,000 out of my other vehicle"

Anonymous, NJ (2008 GMC Sierra 1500 SLT 5.3-L V8)
Rotors

"Both front hubs (left and right) and associated brakes have been replaced at the dealer due to failure"

Jeffrey J., MI (2008 GMC Sierra 1500 SLE 5.3-L V8)

"When the caliper came loose, it damaged the rotor"

Lyle A., CO (2008 GMC Sierra 1500 SLE 5.3-L V8)

"worped"

Jonas W., IN (2008 GMC Sierra 1500 SLE 5.3-L V8)
Squeaking

"The squealing brakes have been horrible since I've owned it, with premature brake wear. Svc dept. unable to determine and/or eliminate. Multiple trips to svc dept. Very annoying"

Shannon G., AK (2008 GMC Sierra 1500 SLT)

Fuel System

Check engine light, sensors (includes O2 or oxygen sensor), emission control devices (includes EGR), engine computer, engine computer, fuel cap, fuel gauge/sender, fuel injection system, fuel pump, fuel leaks, stalling or hesitation.

What Owners Say

Emission control devices (includes EGR)

"Engine check light. Sent to garage for repair"

Anonymous, NJ (2008 GMC Sierra 1500 4.3-L V6)
Fuel cap

"check engine light says gas cap is bad. Dealer has replaced 3TIMES . Light returns after 4 months."

Anonymous, MI (2008 GMC Sierra 1500 SLT 5.3-L V8)
Fuel gauge/sender

"An unexpected expense. Not a part that one expects to replace"

Gregory R., ME (2008 GMC Sierra 1500 4.8-L V8)
Fuel pump

"There is a design flaw in the fuel tank portion to which the fule pump is mounted. It collects water and the fuel pump after time will sit in a well of moisture. The metal mount ring rots and when the rust eats through the mounting ring the fuel pu"

Jeffrey K., CT (2008 GMC Sierra 1500 SLT 5.3-L V8)
Sensors (includes O2 or oxygen sensor)

"Throttle position sensor failed and the computer system went into emergency power mode (limp) . I was on the highway and could not go faster than 30 mph and it was very dangerous"

Jeffrey K., CT (2008 GMC Sierra 1500 SLT 5.3-L V8)

"had to replace catalytic converter"

Anonymous, KS (2008 GMC Sierra 1500 4.8-L V8)

"replacement of both oxygen and noc sensors replaced"

James F., OH (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Unexplained problem with tire pressure sensing system. Safety chimes come and go"

Gregory R., ME (2008 GMC Sierra 1500 4.8-L V8)

"there were 3 sensors that went bad. we replaced 2 of them. the third one was for the shift to 4 cylinders instead of 8 at prolonged steady speeds. the cost to repair was prohibitive total repair for the 2 replaced was almost $1000.00"

Anonymous, TX (2008 GMC Sierra 1500 SLE 4.8-L V8)

"it was a bad sensor in the fuel tank,made a light come on in the dash so I couldn't use the remote start. It also gave us trouble when filling the tank with fuel, wanting to stop filling just after starting."

Anonymous, FL (2008 GMC Sierra 1500 SLT 5.3-L V8)

"Sender in fuel tank set a code."

Lyle B., VA (2008 GMC Sierra 1500 SLT 5.3-L V8)

"Engine trouble light stayed on. Dealer claimed he replaced the O2 sensor. Light is now off"

Anonymous, ON (2008 GMC Sierra 1500 SLE 4.8-L V8)

Drive System

Driveshaft or axle, CV joint, differential, transfer case, 4WD/AWD components, driveline vibration, traction control, electronic stability control (ESC), electrical failure.

What Owners Say

4WD/AWD components

"Right front hub needed to be replaced"

Brian M., BC (2008 GMC Sierra 1500 SLE 4.8-L V8)

"I was stuck in some heavy snow and managed to get out no problem but filled many components with snow that froze as solid ice and caused issues with one of the actuators"

Anonymous, SK (2008 GMC Sierra 1500 SLE 5.3-L V8)
Differential

"Small leak but VERY expensive to repair. This is a MAJOR repair and until the leak is substantial I will not repair it"

Howard R., TN (2008 GMC Sierra 1500 SLT 5.3-L V8)

"I think it is all part of the rear end"

James G., NM (2008 GMC Sierra 1500 5.3-L V8)

"Clunk in rear end. Not drive shaft but premature rear end gear wear"

Len H., BC (2008 GMC Sierra 1500 SLE 5.3-L V8)
Driveline vibration

"the left front wheel bearing failed, this also caused problems with the rotor and caliper"

Anonymous, AB (2008 GMC Sierra 1500 SLT 5.3-L V8)
Driveshaft or axle

"aluminum rim air leaks due to rim corrosion"

Anonymous, ON (2008 GMC Sierra 1500 SLT 5.3-L V8)

"Spline on driveshaft needs l grease regularly to keep it from "clunking""

Anonymous, TX (2008 GMC Sierra 1500 SLT 5.3-L V8)

"The rear end of the truck went out and we had to be towed into Truckee, CA. We were pulling a travel trailer on a camping trip. We had a rebuilt rear end installed in the truck. We were stuck in Truckee for 5 days"

James G., NM (2008 GMC Sierra 1500 5.3-L V8)
Electrical failure

"A solenoid controlling the electronics portion of the 4WD selector in the transmission indicated on the on-dash warning. The solenoid was replaced and has been operating perfectly since."

Anonymous, CO (2008 GMC Sierra 1500 SLT 6.2-L V8)
Transfer case

"Used for plowing got stuck and the front differential blew out. Case housing cast aluminum very prone to breakage."

Anonymous, NH (2008 GMC Sierra 1500 WT 4.8-L V8)

Body Integrity

Squeaks, rattles, wind noises, loose or cracked seals and/or weather-stripping, air and water leaks.

What Owners Say

Air or water leaks

"Starter failed"

Anonymous, NS (2008 GMC Sierra 1500 Denali 6.2-L V8)

"at 10 yrs old high mounted brake light leaked water into cabin which pooled at drivers feet. removed entire interior to find leak."

Anonymous, WA (2008 GMC Sierra 1500 SLT 5.3-L V8)

"the window and door seals leaks and the bottom of door holds water. The result is that it shorted out 2 of my four speakers and ended up causing radio not to play at all. From my research, it was a big problem with that as time I walked into one place and my google research, they knew exactly what the problem was."

Erskine P., TX (2008 GMC Sierra 1500 SLT 4.8-L V8)

"water was entering the cabin via the high mounted brake light dripping behind trim and soaking pads and carpet on drivers side front and rear"

Anonymous, WA (2008 GMC Sierra 1500 SLT 5.3-L V8)

"Have water leak in the front right column or window post. Could not be duplicated in shop but occurs when it rains hard"

Clinton B., NY (2008 GMC Sierra 1500 Denali 6.2-L V8)
Squeaks or rattles

"I have some type of rattle that has been coming from underneath the vehicle and I have yet to figure out what it is. More annoying than anything."

Erskine P., TX (2008 GMC Sierra 1500 SLT 4.8-L V8)

"Loud squeak seems to be coming from bed area."

Anonymous, RI (2008 GMC Sierra 1500 WT 4.8-L V8)

"The passenger cabin rear area continually makes noises on all but the smoothest of streets. Not loud, but almost always there. I have checked every possible fitting and source and have been unable to stop it."

H S., CA (2008 GMC Sierra 1500 Denali 6.2-L V8)

"The passenger cabin interior is subject to constant squeaks and rattles in normal urban travel. The noises respond to the smallest unevenness encountered on city streets. The dealer has been unable to diagnose the cause(s)"

H S., CA (2008 GMC Sierra 1500 Denali 6.2-L V8)

"I have squeaks and rattles all under the chassis of vehicle and and it gets unnerving and has been going on forever. Have never had an accident so will have to have a mechanic look at it to see what the heck is causing it"

Erskine P., TX (2008 GMC Sierra 1500 SLT 4.8-L V8)
Wind noise

"Door pin is broken and is causing the door to be out of alignment. Dealer claims issue with getting tool to replace causing a delay."

Christopher C., MA (2008 GMC Sierra 1500 SLE 5.3-L V8)

Engine Minor

Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, oil leaks.

What Owners Say

Engine computer

"Both computers for the 4WD and engine failed"

Anonymous, NY (2008 GMC Sierra 1500 SLE 5.3-L V8)
Engine knock or ping

"we are not sure if the failed oil pump caused this or it happened circumstantially , honestly dont remember if it ticked before . vehicle was only driven about 400 ft after engine lost oil pressure"

Susan A., MA (2008 GMC Sierra 1500 SLE 5.3-L V8)
Engine mounts

"Both engine mounts broke in half causing a hard down shift"

Michael L., GA (2008 GMC Sierra 1500 Denali 6.2-L V8)

"The left engine mount broke. The truck has never been subjected to rough terrain conditions. It cost me $700 to have it replaced"

H S., CA (2008 GMC Sierra 1500 Denali 6.2-L V8)
Fuel leaks

"Animal had chewed top of hose going into gas tank"

Richard K., FL (2008 GMC Sierra 1500 SLT 5.3-L V8)
Oil leaks

"Burning oil, approx 1 quart every 2000-3000 miles"

Anonymous, KS (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Rear main seal has leaked since it was new. Have taken it ti CBG,(dealer) and it hasn't been fixed. Last time they claim they confused with another truck and changed the oil. Previously I had shown them the leak and when I took it in they couldn't"

Anonymous, LA (2008 GMC Sierra 1500 SLT 4.8-L V8)

"Right front axle seal leaked and was repaired for less than $200.00 same day by dealer. No inconvenience"

Scott J., MN (2008 GMC Sierra 1500 4.8-L V8)

"I’ve taken it in once and paid for repairs. Still leaks oil"

Anonymous, TX (2008 GMC Sierra 1500 Denali 6.2-L V8)

"Design issue with valve cover causes oil to be consumed over time. Unexpectedly, oil pressure (and level) dropped."

Anonymous, BC (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Oil dipstick tube leaking at base. Replaced new. Still dropping oil to a lessor degree"

Michael F., MI (2008 GMC Sierra 1500 6.0-L V8)

Suspension

Shocks or struts, ball joints, tie rods, wheel bearings, alignment, steering linkage (includes rack and pinion), power steering (pumps and hoses, leaks), wheel balance, springs or torsion bars, bushings, electronic or air suspension.

What Owners Say

Alignment

"I live and work on rough roads and it seems hard to keep front aligned"

Kenyon N., MS (2008 GMC Sierra 1500 SLT 5.3-L V8)

"uneven front wear"

Anonymous, AL (2008 GMC Sierra 1500 SLT 5.3-L V8)
Ball joints

"replaced ball joint and right upper control arm"

Brian M., BC (2008 GMC Sierra 1500 SLE 4.8-L V8)
Power steering leaks

"I had two seperate instances were the metal power steering lines blew out and all the fluid leaked out requiring tows back home to be fixed. both areas were in front drivers side next to the radiator"

Susan A., MA (2008 GMC Sierra 1500 SLE 5.3-L V8)
Shocks or struts

"seem to have worn out prematurely"

Erskine P., TX (2008 GMC Sierra 1500 SLT 5.3-L V8)
Springs or torsion bars

"The spring broke and had to be replaced by a mechanic"

Anonymous, (2008 GMC Sierra 1500 Unsure 4.8-L V8)
Wheel bearings

"Bearing went out & replaced"

Anonymous, KS (2008 GMC Sierra 1500 SLE 5.3-L V8)

"48,000 miles, mostly all highway driving, shouldn't have had to be replaced. both side 3 months apart over $1000.00"

Anonymous, NH (2008 GMC Sierra 1500 SLE 5.3-L V8)

"replace wheel bearings"

Anonymous, ON (2008 GMC Sierra 1500 SLT 5.3-L V8)

"front wheel bearing assembly failed causing brake peddal to go to the floor with very little braking effect, could have been disastrous"

Anonymous, ON (2008 GMC Sierra 1500 SLT 5.3-L V8)

Body Hardware

Power or manual windows, locks and latches, tailgate, hatch or trunk, doors or sliding doors, mirrors, seat controls, safety belts, sunroof, convertible top.

What Owners Say

Locks and latches

"Electric locks no longer operate properly on two of the four doors"

H W., ME (2008 GMC Sierra 1500 SLE 6.2-L V8)

"locking on pass door only works in very cold tyemps. driver door does not work"

William B., NH (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Both rear door handles broke at the attachment point"

Timothy S., CA (2008 GMC Sierra 1500 Denali 6.2-L V8)

"The door latches on the GMC trucks and Vans I own all have similar problems with door handles braking after several years of use. The handles are plastic and I believe the problems stem from the fact that all of these Large trucks are not garaged and the California sun and Plastic Door Handles are not a good match. Overall the GMC / CHEVROLET trucks I own are reliable work vehicles that last hundreds of thousands of miles... but the paint sucks!"

Vickie O., CA (2008 GMC Sierra 1500 Denali 6.2-L V8)
Mirrors

"Electric mirror on passenger's side will not retract, think it's a striped gear"

Lindsey S., TX (2008 GMC Sierra 1500 SLE 5.3-L V8)

"The automatic retracting mirror on passenger's side is not functioning"

Lindsey S., TX (2008 GMC Sierra 1500 SLE 5.3-L V8)
Sunroof

"leaked"

Anonymous, NS (2008 GMC Sierra 1500 Denali 6.2-L V8)
Windows

"Both the front driver and passenger side windows stopped working. Replaced both control switches, but the problem keeps returning."

Anonymous, (2008 GMC Sierra 1500 SLT 5.3-L V8)

Engine Major

Engine rebuild or replacement, cylinder head, head gasket, turbo or supercharger, timing chain or timing belt.

What Owners Say

Cylinder head

"Broken rocker arm"

James F., OH (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Blew a spark plug, head cracked right side. Replace through dealership in Gaylord Michigan. Have 30.m miles on new head and running well"

Michael F., MI (2008 GMC Sierra 1500 6.0-L V8)
Engine rebuild or replacement

"Engine completely failed. Required replacement. Maintenance history was as recommended by OEM. This truck has had multiple problems"

Anonymous, (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Engine knock started at 97000 miles. Oil consumption due to poor PVC design. Poor oil pump spring created oil starvation at start up and acceleration. Caused excessive wear on engine bearing. Worn engine bearings caused low oil pressure, causing truck engine to run hot. Result blown engine, cracked piston head, spun cam bearing, spun connecting rod bearing, spun main bearing."

Anonymous, NJ (2008 GMC Sierra 1500 Denali 6.2-L V8)

"engine failure due to roller lifters damaging cam(or crank)shaft started displaying weird messages on dash service traction control and others off and on for a few months then started making funny noises off and on my soninlaw ( a mechanic ) said it was the bad lifters in that particular motor that drops from 8 cylinders to 4. we opted for a new remaned Jasper motor instead of the labor to tear mine apart and reassemble"

Susan A., MA (2008 GMC Sierra 1500 SLE 5.3-L V8)

"After the oil pump let go and was replaced there was a ticking noise for a few months before it got worse and engine started misfiring and we pulled engine apart to find a bad lifter(on of the ones that shuts off the 8 cylinders to 4) and it had damaged the crankshaft . decided to get a rebuilt Jasper engine instead of fixing the old one due to possibility of other problems with metal peices being inside the engine and causing further damage after it was reassembled. we are actually awaiting new engine now"

Susan A., MA (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Replaced engine after 200,000"

Michael L., GA (2008 GMC Sierra 1500 Denali 6.2-L V8)

Exhaust

Muffler, pipes, catalytic converter, exhaust manifold, leaks.

What Owners Say

Other/unsure

"Related to the Takata airbag recall. Currently no repair being offered"

Anonymous, (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Warning light for air bag, both passenger and driver, two separate times. Module had to be replaced. Repair was immediate and cost around $400"

Anonymous, BC (2008 GMC Sierra 1500 SLE 5.3-L V8)

"My shop mechanic says the right front airbag sensor has to be replaced at a cost of $250"

Anonymous, CT (2008 GMC Sierra 1500 SLT 5.3-L V8)

"My pickup is subject to an air bag recall that is over two years old and the dealer still doesn't have the new air bag to replace it from GM."

Anonymous, KS (2008 GMC Sierra 1500 SLE 5.3-L V8)

"front right impact sensor has to be replaced"

Anonymous, CT (2008 GMC Sierra 1500 SLT 5.3-L V8)

Transmission Major

Transmission rebuild or replacement, torque converter, clutch replacement.

What Owners Say

Torque converter

"Same thing happened as the transmission. The converter actually malfunctioned first."

John I., PA (2008 GMC Sierra 1500 SLE 5.3-L V8)
Transmission rebuild or replacement

"Problem when accelerating with automatic transmission changing gears. Stuck in second"

Anonymous, CA (2008 GMC Sierra 1500 4.3-L V6)

"Transmission lost reverse intermittently . Replaced with new factory rebuilt at 164000 miles"

Jim A., FL (2008 GMC Sierra 1500 Denali 6.2-L V8)

"The radiator allowed coolant to leak into the transmission and transmission fluid into the cooling system. The transmission did not like coolant from the radiator."

John I., PA (2008 GMC Sierra 1500 SLE 5.3-L V8)

Transmission Minor

Gear selector or linkage, leaks, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission.

What Owners Say

Slipping transmission

"car make noises when starting out getting into drive"

Anonymous, CA (2008 GMC Sierra 1500 4.3-L V6)
Transmission leaks

"Transmission has leaked since it was new. Dealer wouldn't fix it because warranty work didn't pay his mechanics enough"

Anonymous, LA (2008 GMC Sierra 1500 SLT 4.8-L V8)

"TRANSMISSION HAS A MINOR LEAK FROM THE FRONT.HAS LEAKED ABOUT 2 QUARTS OVER FOUR YEARS AND 40000 MILES"

Anonymous, LA (2008 GMC Sierra 1500 WT 4.8-L V8)

"The oil lines for cooling the transmission developed a major leak causing most of the oil to leak out. The transmission would then slip and the vehicle was unable to move."

Roger B., ON (2008 GMC Sierra 1500 SLE 4.8-L V8)

Climate System

Blower (fan) motor, A/C compressor, condenser, evaporator, heater system, automatic climate control, refrigerant leakage, electrical failure.

What Owners Say

A/C compressor

"just stopped working suddenly"

Anonymous, (2008 GMC Sierra 1500 SLE 5.3-L V8)
Heater system

"defrost door wouldn't open"

David J., NL (2008 GMC Sierra 1500 SLE 5.3-L V8)
Refrigerant leaks

"Took 3 summers to finally find the coolant leak in my truck. It was in the evaporator behind the dash"

Michael M., OH (2008 GMC Sierra 1500 SLE 5.3-L V8)

"Refrigerant leaks down about every three weeks, they are having trouble finding the leak. I take it back tomorrow for the third try. I just purchased this vehicle a couple of months ago"

Steve L., DE (2008 GMC Sierra 1500 SLE 5.3-L V8)

Power Equipment

Cruise control, clock, warning lights, body control module, keyless entry, wiper motor or washer, tire pressure monitor, interior or exterior lights, horn, gauges, 12V power plug, remote engine start, alarm or security system

What Owners Say

Battery (not hybrid or electric)

"Due to the amounts of electrical components in this truck, the rated battery CCA is insufficient. Battery would always die prematurely. Vehicle could not sit for more than 2 days. BCM (Body Control Module) needed reflash/update from dealer, as it would not go into sleep/shutdown mode. This would cause excessive battery drain. After reflash problem not as bad. Issue only became worse during cold temos in winter. The long term fix was dual battery setup with ACDelco AGM batteries. Truck was very reliable after this setup."

Anonymous, NJ (2008 GMC Sierra 1500 Denali 6.2-L V8)
Battery cables

"Motor and transmission get locked up in low gear. All due to a faulty negative battery cable. This has taken place three times"

Clinton B., NY (2008 GMC Sierra 1500 Denali 6.2-L V8)

Engine Cooling

Radiator, cooling fan, antifreeze leaks, water pump, thermostat, overheating.

What Owners Say

Thermostat

"I have had two thermostats replaced, one at 60k and one at 90k"

Lawrence G., TX (2008 GMC Sierra 1500 WT 4.3-L V6)
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