GMC Canyon

"Rough and surprising clunking shifts. Slow shifting. Hesitation. Tranny banged down a shift harder than felt proper. Clunks down a gear with pronounced thud. Apparently there is a GM fix in USA but in Canada have heard nothing. Switching to Mobile 1 LV ATF HP (Part # 122210) should solve problem ref GM Service Bulletin. Very annoying."

"First time completed flushing of system and used different fluid, second time replaced torque converter, all within first 10,000 - 12000 miles. Now at 23,000 mile problem has returned."

"Experienced vibration at about 55 to 60 mph."

"Loud thumping noise after 20,000. Relaced under warranty."

"noisy"

"This item was replaced by the dealer to eliminate the jerkiness when changing gears. However, this did not eliminate the problem."

"Transmission shudder, torque converter replaced in 2019"

"Trans got really loud, but it happened gradually so I didn't notice at first (thought it might be tire noise)"

"The dealership replaced the torque converter"

"Problem has resulted in three repairs. First visit in 2018 resulted in flush and new fluid. Second repair in 2019 resulted in replacement of torque converter. Third visit resulted in a second new torque converter in 2019. So far no recurrence of problem. While frustrating, I must commend the dealership for standing by their product and providing a good loaner vehicle."

"Torque Converter replaced 4 times. The newest one lasted 19000 miles, but it is showing signs of the same issue."

"I was pulling my trailer and collector car to a car show. It was noticed for a couple of days but I thought it was road noise. When I was towing from St Louis to Columbus. OHIO It really got noisy. It was as if I was driving on the roadside wakeup bar. I took it into the dealer the next morning and the monitored the truck with a computer OBD computer. He could see the torque converter cutting in and out,causing the vibration. He said the torque converter needs to be replaced, but the could not get to the repair for three weeks! I had no choice I traded for a different truck so I could get home."

"Vehicle started making noise similar to rear tire issues. GMC dealership repaired with new torque converter at no cost."

"Truck abruptly and uncomfortably lurches forward when stopping as the truck downshifts to first gear. Service manager and assistant service manager on test drives agreed there was a problem. On three different service occasions, (having the truck in the shop for a total of six weeks) they first changed the shift valve - got the truck back with no improvement. Second attempt, they changed out the torque converter - got the truck back with no improvement. Third attempt, they replaced the transmission with a rebuilt unit. Got the truck back with no improvement. Then I was told GM was coming out with a fix for the problem (which also, by the way, afflicted many GM vehicles) in the way of a special transmission fluid. Because this fluid was in such demand, they told me they call me when it came in which might take a while. EIGHT MONTHS LATER, after hearing nothing from the dealer, I went to see the owner of the dealership, who said to me, Wait here while I talk to the service manager. When he returned, He told me he was informed by the service manager that the new fluid would NOT fix the problem and they had no intention of trying it because, THE TRANSMISSION IN YOUR VEHICLE IS WITHIN SPECS AND RUNNING AS DESIGNED. He also admitted the service director lied to me but 'Don't Worry - He was reprimanded. They refused any further fixes, and I'm stuck with being jolted in this truck till the lease is up on 8/20. Will never consider a GM vehicle ever again"

"The transmission fluid was replaced to try to correct rough and at times hard shifts . The replacement fluid did correct most of the problem but there are still hard shifts when the transmission is cikd."

"The vehicle feels like it is missing when you get up to cruise speed (55-65 MPH). The dealer replaced the torque converter. This fix has not totally repaired the problem."

"would shift hard at 20, 40 and 60 mph and sometimes would hold before shifting, other times it would have a very hard knock shift."

"This was the well-documented "transmission shudder" found in the 6L50 transmissions. The GM solution was a complete transmission fluid flush and refill with a new synthetic based fluid. No issues since this service was performed at the dealership."

"Rough shifting and vibrations due to bad transmission fluid from factory. Issue was resolved by dealer under warranty."

"When you put it into passing gear it shifts very hard when it gets to the top speed"

"There was a shudder/shake at 1500 rpm. The dealer knew about the problem, fixed it under warranty, and provided me a free loan car when it was being worked on. Problem solved."

"Transmission still hunts for the right gears when traveling at a steady speed. Feels annoying and at times feel that the six gear would be better then the 8 gear transmission"

"See reply about previous issue."

"It at times tells me to Service the Transmission. But the service people find nothing. Est it is a software glitch"

"The compressor noises seem to be more pronounces when in auto mode. Also, temperature control doesn't seem particularly precise."