Three Standout Highlights of the 2025 GMC Sierra HD
Shopping for a powerful truck that knows no limits. You’ll love everything about the new 2025 GMC Sierra HD. This truck has a commanding presence both on and off the road and all the features and amenities you need for a comfortable, luxurious, and enjoyable driving experience. Whether you plan to use this truck for work, play, or both, you can count on one thing: its power and capabilities won’t disappoint.
1. Engine Power and Performance
The new GMC Sierra HD is a heavy-duty pickup truck with impressive power. Drivers will have different engine options based on the model they choose, including the 6.6L Turbo-Diesel V8 engine with an Allison 10-speed automatic transmission, which comes standard on the Denali Ultimate and is an available option on the PRO, SLE, SLT, AT4, Denali, and AT4X models.
There’s also a 6.6L V8 gas engine with an Allison 10-speed automatic transmission that comes standard on the base model. The turbo diesel engine has 975 pound-feet of torque and 470 hp and the 3500 model has a max towing capacity of up to 36,000 pounds while the 2500 crew cab model has a max towing capacity of 21,870 pounds.
The powertrain of your GMC includes the engine, transmission, driveshafts, differentials, and axles. To ensure your truck or SUV generates and delivers full force to the wheels with optimal efficiency, each drivetrain component must be kept in tip-top shape with regular preventative maintenance at your local GMC dealership. Here’s an outline of what’s involved in good powertrain care.
Oil Changes and Engine Tune-Ups
As the seat of your GMC’s impressive power, the engine must always be well-lubricated with high-quality motor oil. This means routine oil changes twice a year or more. You should also have the engine examined and tuned up once a year.
Cooling System Inspections
Every component of the cooling system also needs to be professionally inspected once a year. In addition, it’s wise to check the condition of your coolant monthly and have it flushed every two years.
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