GMC Sierra 2500HD Road Test

Model Year Summary

The Sierra HD and its twin the Chevrolet Silverado HD are designed
for heavy towing and hauling. The 6.0-liter V8 and 6.6-liter turbodiesel are
both mated to a six-speed automatic. The latter works well, and employs a
heavy-duty Allison-made transmission.  We
measured 14 mpg overall with the diesel. The LTZ trim has a luxurious cabin but
ascending to into it is quite a climb. If you don't plan to go off-road, the
Z71 suspension is superfluous -- it makes the ride extremely stiff, bucking
uncomfortably on every bump. The cabin is quiet but the diesel clatter is
audible at low speeds. Handling is clumsy but ultimately secure. The HD pickups
are the better choice for commercial purposes and lend themselves to snow-plowing
duties. Available safety features include forward-collision alert,
lane-departure warning, and front and rear park assist. Apple CarPlay and
Android Auto are compatible with the easy-to-use infotainment system.

Better than average New Car Reliability Prediction

Based on the latest survey, we expect reliability of new models will be 32% above average

Warranty

All cars come with basic warranty coverage, also known as a bumper-to-bumper warranty. This protects consumers against unexpected problems with non-wear items. Powertrain warranty protects against engine and transmission troubles. Rust through, or corrosion warranty, covers rust to non-damaged components. Roadside aid provides on-location assistance in case of a breakdown and may include limited towing services.

Extended warranties provide peace of mind. Owners of models known to have worse-than-average predicted reliability can mitigate risks with an extended warranty. Generally, we recommend buying a model with better-than-average reliability and skipping this expensive add on. If you do buy an extended warranty, it is key to read the small print to understand what is covered and where you can bring the car for repairs.

Basic (years/miles)
3/36000

Powertrain (years/miles)
5/60000

Rust through (years/miles)
5/60000

Roadside aid (years/miles)
5/60000