Discover the Trim Levels of the 2025 GMC Sierra HD: Professional Grade Heavy-Duty Truck

One of the best heavy-duty pickup trucks on the road is the 2025 GMC Sierra HD. This workhorse truck can be fully customized by bed length, cab style, and drivetrain to build a pickup truck that works for your work and recreation needs. 

The base engine for most Sierra HD models is a 6.6-liter V8 motor that produces 401 horsepower and 464 lb-ft of torque. For both the 2500 HD and 3500 HD trims, the truck can be configured with a regular cab/long bed, double cab/long bed, crew cab/standard bed, or crew cab/long bed. 

Pro

The Pro trim establishes the baseline standard features for the rest of the lineup. The truck comes with the Sierra HD Pro Safety suite of driver-assistance software, which includes Forward Collision Alert, Automatic Emergency Braking, Front Pedestrian Braking, and Lane Departure Warning. 

SLE

The SLE model has a 13.4-inch GMC Premium Infotainment system that is compatible with Google Built-in features, such as apps downloaded from the Play Store, Google Maps, and Google Assistant. This immersive infotainment system syncs up with your smartphone wirelessly, supports Bluetooth-enabled music streaming, and allows you to use voice commands to adjust cabin settings or make phone calls. 

SLT

The SLT adds convenient exterior features like power-adjustable vertical trailering mirrors with Chrome mirror caps. These mirrors can fold or extend up to 3.31 inches to refine your view of the road. The upper glass is heated and auto-dimming, while the lower glass has a convex shape to widen your sight. These mirrors also have integrated turn signals and puddle lamps. 

AT4

The AT4 can be equipped with the X31 Off-Road Package to enhance the off-roading capabilities of the truck with an exclusive off-road suspension and twin-tube Rancho shocks to soften the feel of rough terrain. This package also comes with Hill Descent Control to assist with steep downhill driving speed so you can focus on steering. 

AT4X

The ATX4 is exclusive to the 2500 HD model. This trim has a power sunroof for added style and sophistication. The GMC MultiPro Tailgate is also standard for this model. 

Denali

The Denali model has standard features like a heated steering wheel, heated first and second-row outboard seats, and an interior auto-dimming mirror. This truck comes with a wireless phone charger and a wireless phone projection system for Android Auto and Apple CarPlay. 

Denali Ultimate

The top-tier trim is equipped with a 6.6-liter Duramax turbocharged V8 diesel engine, which offers 470 horsepower and 975 lb-ft of torque. This diesel motor has a standard engine block heater and an engine after-run feature to quickly cool the engine. A 10-speed automatic transmission is standard for this powertrain. 

Get in touch with Oxendale GMC in Flagstaff, AZ to customize your pickup truck today.

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