The GMC Sierra HD has undergone a complete revamp for 2007. Outside it has been redesigned to differentiate it from both its GMC light-duty siblings and its Chevrolet Silverado HD counterpart. Inside, it features two distinct interiors: a well-equipped "pure pickup" style and a more family-oriented, amenity-laden style. Under the hood it offers more powerful gasoline and diesel powertrains backed by GM's new 5-year/100,000-mile warranty.
GMC has been in the heavy-duty (HD) pickup truck market for decades, but its presence becomes even more solid with the introduction of the all-new line of 2007 Sierra HDs. Changes to both the interior and exterior are notable, but it's the engine upgrades that help differentiate the new Sierra HD from its predecessors. Thanks to variable valve timing, the new 353-hp, 6.0-liter V-8 is more fuel efficient and produces 53 more horsepower and 13 lb.-ft. more torque than last year's 6.0-liter engine. It also benefits from a new 6-speed automatic transmission with two overdrive gears and manual-shift capability. Last year's Duramax 6.6-liter V-8 turbocharged diesel engine has also been substantially upgraded to meet stringent government emission standards and, in the process, it now produces a bit more horsepower and torque. The new 365-hp diesel comes with an Allison 1000 6-speed automatic transmission that features what GM touts to be a class-first range-selection function.
Sierra HD trucks come in two models: three-quarter ton 2500HD and one-ton 3500HD, the latter also available in a dual-rear-wheel configuration. Both models offer a choice of three cab designs-regular, extended, and crew cab-and come in WT and SLE trim levels. Long and short cargo beds are offered for both the 2500HD and 3500HD, as is 4-wheel drive. And for the first time on GMC heavy-duty models, a special off-road package is available.
Some of the many new features available on the 2007 Sierra HD include 170-degree-opening rear access doors with fully retractable power windows on extended cab models, redesigned cargo boxes with increased strength and greater capacity, an innovative cargo management system with a host of dealer-ordered accessory packages, and OnStar's new Turn-by-Turn Navigation system.
The GMC Sierra HD competes in the Large Pickup segment, which consists of seven models. Buyers in this segment look for performance, comfort, and reliability, according to the J.D. Power and Associates 2006 Avoider StudySM and the Escaped Shopper Study.SM
The top sellers in the segment during calendar year 2006, according to the J.D. Power and Associates Sales Report,SM were the Ford F-Series (764,198 units sold, including Super Duty models), Chevrolet Silverado (636,069, including Heavy Duty, classic, and Classic HD models), and Dodge Ram Pickup (364,177, including Heavy Duty models). The GMC Sierra HD sold 210,736 units (including light- and heavy-duty models) in 2006, a decrease of 8.2 percent compared to the previous year. Other models offered in the Large Pickup segment include the Toyota Tundra, Nissan Titan , and Chevrolet Avalanche .
|Work Truck||5 speed manual||$22,225||300-hp / 6.0L 8-cyl||0/0|
|SL||5 speed manual||$24,280||300-hp / 6.0L 8-cyl||0/0|
|SLE1||5 speed manual||$25,385||300-hp / 6.0L 8-cyl||0/0|
|SLE2||4 speed automatic||$30,820||300-hp / 6.0L 8-cyl||0/0|
|SLT||4 speed automatic||$32,585||300-hp / 6.0L 8-cyl||0/0|