![]() The Sierra’s standard electronic stability system includes rollover mitigation technology. Four-speed or six-speed automatic transmission.Flex-fuel 403-hp, 6.2-liter V-8 with aluminum block and cylinder heads, cam-in-block and two valves per cylinder that makes 417 pounds-feet of torque.Flex-fuel 315-hp (gas) or 326-hp (E85), 5.3-liter V-8 with aluminum block and cylinder heads, cam-in-block, two valves per cylinder and 335 pounds-feet of torque (gas) or 348 pounds-feet of torque (E85).Flex-fuel 315-hp (gas) or 326-hp (E85), 5.3-liter V-8 with iron block and aluminum cylinder heads, cam-in-block, two valves per cylinder and 335 pounds-feet of torque (gas) or 348 pounds-feet of torque (E85).302-hp, 4.8-liter V-8 with iron block and aluminum cylinder heads, cam-in-block, two valves per cylinder and 305 pounds-feet of torque.195-horsepower, 4.3-liter V-6 with iron block and cylinder heads, cam-in-block, two valves per cylinder and 260 pounds-feet of torque.The 5.3-liter V-8 features fuel-saving cylinder-deactivation technology. The Sierra offers five available suspensions, including an off-road-oriented Z71 package and the NHT enhanced trailering package. Available leather-wrapped heated steering wheel.Available integrated trailer-brake control.The Denali trim is the most luxurious of any GM pickup truck with upgraded trim and materials. The SLT also gets a Bose stereo and a 10-way power-adjustable driver’s seat. Leather seating is available on the SLE and standard on the SLT. The Sierra’s cab is spacious and well-organized. The SLT offers upgraded materials and a different dash design. Lower-end trucks are more utility-minded, with large door handles that can be operated while wearing gloves. The Sierra showcases two different interior designs. Wide rear-door openings on extended cab models to load passengers, cargo.The upscale Denali trim features a unique chrome grille and wheels. While GM is trying to differentiate the Silverado and Sierra, the common silhouette is hard to overcome, even with unique front fenders, grille, bumpers, headlamps, cargo box and taillamps. In addition, the 2500HD model can have a 6.0-liter V-8 that runs on compressed natural gas or gasoline. ![]() Light-duty Sierras with the 5.3-liter and 6.2-liter V-8s and a six-speed automatic transmission and heavy-duty models with the 6.0-liter V-8 now have engine braking on grades without having to use the Tow/Haul mode. (Skip to details on the: Sierra 2500HD and 3500HD) The Sierra Hybrid is covered separately in the Research section. Available exclusively in the crew-cab body style, the Sierra Hybrid is expected to use one-quarter less gas than a regular Sierra. The Sierra Hybrid is a half-ton pickup that achieves better overall fuel economy than a gas-powered Sierra, but it can still pull a 6,100-pound trailer. ![]() They also offer an optional 6.6-liter Duramax diesel engine. The heavy-duty versions of the Sierra give buyers significantly more towing capacity - up to 23,000 pounds - when properly equipped. Most V-8 models are rated to tow around 9,000 pounds, but some models get more than 10,000 pounds with an enhanced trailering package. The Sierra comes in five trim levels: Work Truck, SL, SLE, SLT and Denali. All configurations are available in two- or four-wheel drive. Standard (6-foot-6-inch) and long (8-foot) cargo beds are available on regular and extended cabs, while the crew cab gets a short (5-foot-9-inch) bed. The Sierra comes in regular, extended and crew-cab forms. Competitors include the Ford F-150 and Ram 1500. Versions of the Sierra seat up to six people. There might be slight differences in curb weight and payload, but they share the same powertrain and chassis components. The GMC Sierra 1500 and Chevrolet Silverado share the same platform, but the GMC product is often positioned as a more upscale offering.
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