2007 Chevrolet Silverado and GMC Sierra Heavy Duty
General Motors has introduced the new 2007 Chevrolet Silverado and GMC Sierra heavy-duty pickups, with new exterior designs and the choice of two unique interiors. Silverado and Sierra are offered in a range of 2500HD (three-quarter-ton) and 3500HD (one-ton) guise. Silverado is available in WT, LT and LTZ trim; Sierra is available in WT, SLE and SLT trim - all with differentiated appearance and interiors. Chevy Silverado and GMC Sierra 2500HD and 3500HD models will arrive in the first quarter of 2007. A faster, 57-degree windshield angle reduces wind noise and improves fuel efficiency. Silverado and Sierra heavy-duty trucks are offered in regular, extended and crew cab configurations, which are complemented with standard (6-foot 6-inch) and long (8-foot) cargo box lengths. Silverado and Sierra 3500HD models also are available with the Dually dual rear wheel configuration on a long (8-foot) box.
The standard engine is the new, 6.0L gas V-8. It is rated at a best-in-class 353 horsepower (233 kW) and 373 lb.-ft. of torque (506 Nm) on single rear wheel configurations. Variable valve timing helps improve performance and fuel economy. A new, Hydra-Matic 6L90 six-speed automatic transmission is paired with the engine. A cleaner, more powerful Duramax 6.6L turbo-diesel engine is also available, with power ratings increased to 365 horsepower (272 kW) and 660 lb.-ft. of torque (895 Nm). Upgrades to the engine and a new diesel particulate filter system help provide a 90-percent reduction in particulate matter and a 50-percent reduction in NOx (compared with current standards), meeting a new federal government mandate. All diesel manufacturers are required to meet the new emissions standard, starting in calendar year 2007.
The renowned Allison 1000 six-speed automatic transmission is partnered with the Duramax 6.6L turbo-diesel engine. It delivers good fuel economy, quietness and control. It features a class-first range selection function, which allows the driver to easily select the desired gears to match driving conditions, such as towing a trailer on a steep grade.