Engineering passport
Specifications
Powertrain
Engineering details
Engine6.6 V8 (L8T)
Displacement6.6 L
Cylinders8
FuelPetrol
Transmission6-speed Automatic
DrivetrainRWD
Performance
Numbers that matter
Power396 hp
Torque629 Nm
BodyPickup
STORY
Sierra HD is the collective name for GMC's heavy-duty pickup line, encompassing the 2500HD and 3500HD models built for higher towing and payload than the light-duty Sierra 1500. The current T1XX-based HD trucks, launched for 2020, are powered by the L5P 6.6L Duramax diesel with a 10-speed Allison or the 6.6L gasoline V8. They introduced the AT4 off-road trim, Denali luxury variant, and advanced camera-based trailering systems.
Price Evolution
Loading auction history…
Track Records
Loading records…