Two 2025 GMC Sierra HD trim levels are currently unavailable to order with rear-wheel drive, specifically the 2025 GMC Sierra HD SLE and SLT. Both trims are presently only available to order with four-wheel drive. It’s unclear at this time how long this constraint will be in effect, or if 2WD variants of the 2025 Sierra HD SLE or SLT will be available again at any point in the remainder of the 2025 model year. It’s also possible that this signals a change in the Sierra HD lineup moving into the 2026 model year.
The constraint applies to both 2500 HD and 3500 HD models. As such, the following 2025 GMC Sierra HD configurations are currently unavailable to order:
- Regular Cab Long Bed SLE 2WD
- Double Cab Standard Bed SLE 2WD
- Double Cab Long Bed SLE 2WD
- Crew Cab Standard Bed SLE 2WD
- Crew Cab Long Bed SLE 2WD
- Double Cab Standard Bed SLT 2WD
- Double Cab Long Bed SLT 2WD
- Crew Cab Standard Bed SLT 2WD
- Crew Cab Long Bed SLT 2WD
Pricing for the 2025 GMC Sierra HD starts at $48,295 for the 2500 HD Pro trim level in the Regular Cab / Long Bed body configuration with rear-wheel drive. The most expensive 2025 GMC Sierra HD is the 3500 HD Denali Ultimate trim in the Crew Cab / Long Bed / Dual-Rear-Wheel body configuration with the optional diesel engine and four-wheel drive, starting at $102,295. Check out our previous GM Authority coverage for a more thorough breakdown of 2025 GMC Sierra pricing information. Note that pricing has changed between the 2024 and 2025 model years, with some Sierra HD trims now more expensive, and some Sierra HD trims now less expensive.
As for the engine lineup, the naturally aspirated 6.6L V8 L8T gasoline engine is equipped as standard, with output rated at 401 horsepower and 464 pound-feet of torque. Meanwhile, the 6.6L V8 L5P turbodiesel Duramax engine is optional, with output rated at 470 horsepower and 975 pound-feet of torque. The Allison-branded GM 10-speed automatic transmission is equipped as standard with both powertrains. A more-capable variant of the GM T1 platform provides the underpinnings, while production takes place at the GM Flint plant in Michigan.
Comments
GM continues firing at its own feet!
bring back the impala
Gm going has the new assembly line in Roanoke Indiana all ready for the all new truck ready to go. Building test trucks (something that ferd doesn’t do.)