SIERRA HD POWERTRAINS
A Vortec 6.0L petrol V8 with variable valve timing is matched with the Hydra-Matic 6L90 six-speed automatic transmission as the standard powertrain across the Sierra HD model range. This combination delivers excellent performance and efficiency, with an emphasis on low-rpm performance. It is rated at 268kw (360hp) and 515nm (380lb-ft) of torque.
The bi-fuel version of the 6.0L engine – known by its LC8 engine code – features special hardened valves and valve seats that enables it to run on compressed natural gas (CNG) or gasoline. The Duramax 6.6L diesel and Allison 1000 six-speed automatic transmission powertrain combination is available on all 2500HD and 3500HD models. Highlights of the Duramax diesel include:
SIERRA HD CHASSIS AND SUSPENSION
All Sierra HD models feature fully boxed frame assemblies – 18 different assemblies that accommodate all of the range’s configurations. The front sections are hydroformed.
Additional chassis and suspension features include:
SIERRA HD EXTERIOR FEATURES
Sierra 2500HD and 3500HD models are distinguished by a power dome-style hood with a louvered design, as well as a wide grille with chrome accents and full-width chrome steel front bumper. A lineup of 17- (Dually), 18- and 20-inch wheel/tire combinations are offered. Standard and available exterior features also include:
SIERRA HD INTERIOR FEATURES
Sierra HD models are designed to be comfortable and convenient while on the job, including numerous storage compartments that provide covered access for everything from work gloves to laptops.
For those who work out of their truck, Sierra HDs serve as mobile workspaces, offering mobile WiFi as a dealer-installed option, USB connectivity, Bluetooth for phone connectivity, SiriusXM Satellite Radio and a navigation system. Multiple charge points enable multiple electronic devices to operate simultaneously.
Cold-weather customers warm up more quickly with the Duramax 6.6L engine, which has a starting time on par with gas engines. Its glow plug cycle time takes no more than 3 seconds in temperatures as low as -20 F (-29 C).
Highlights of all models’ standard and available interior features include:
SIERRA DENALI HD
Sierra Denali HD models are offered exclusively in the crew cab body style, in regular- and long-box configurations and in 2WD and 4WD. The Duramax diesel/Allison 1000 powertrain is available across the board.
A Denali-specific chrome grille makes the truck instantly recognisable. Additional chrome trim and body-colour bumpers further distinguish it. Sierra Denali also offers a unique combination of interior style and luxury, including standard nuance perforated leather-appointed front seats, with heated and cooled, 12-way power-adjustable front seats and a leather-wrapped, heated steering wheel.
Denali models feature a unique center console, enhanced interior bright work and detailed, highly finished embossed sill plates. The center console has woodgrain trim and a lid that conceals the cupholders, creating a more finished and refined appearance.