
Expand your flexibility and the possibilities with this versatile, factory-installed system.
Factory-installed rails mounted on the box sides and bulkhead with sliding tie-down hooks. Each rail can support up to 500 pounds*, and the system can be equipped with a variety of genuine GMC Accessories, including:
* Maximum capacity includes weight of driver, passengers, optional equipment and cargo.

A new generation of heavy-duty transmissions.

With six forward speeds, the 6L90 continues the Hydra-Matic tradition of premium transmission quality but adds a dimension of flexibility and efficiency.

You get enough noise on the job site: You don't need it from your truck.

Tight tolerances, premium materials, and aerodynamic design collaborate to bring you a heavy-duty truck with low interior noise levels.

Details give Sierra's instrument panel a rich, high-quality look and feel.

Sierra's attention to detail will not go unnoticed. Chrome details, wood grain trim, and low-gloss tones give Sierra's instrument panels a rich, high-quality look and feel.
An available full touch-screen navigation system* also features a fully integrated AM/FM stereo and CD player.
* Map coverage not available in Puerto Rico, the Virgin Islands and portions of Canada.
Get one year of OnStar Safe & Sound Plan.†
Enjoy the world's most comprehensive in-vehicle security, communications, and diagnostics system.†
A built-in torsion bar makes raising the tailgate easier.
The EZ Lift Locking Tailgate with built-in torsion bar and locking mechanism makes it easy to access and secure your cargo.*
*Cargo capacity limited by weight and distribution.
Get advance notification of obstacles behind the vehicle.
With LED lights and audible alerts, the Ultrasonic Rear Parking Assist System warns of stationary objects behind the vehicle to ensure greater safety when parking or backing up.
Configure the rear cab area to best suit your needs.
The 60/40 split rear seat provides added flexibility and extra rear cargo room* without sacrificing comfort.
*Cargo capacity limited by weight and distribution.
Get the confidence that comes with 100,000 miles/5 years of powertrain warranty coverage.††
Now standard on most 2008 GMC models: The 100,000-mile/5-year GMC Powertrain Limited Warranty, plus Roadside Assistance and Courtesy Transportation.††