GMC Sierra Denali (2007)

SLT models feature a luxury-inspired interior with a unique instrument panel, door panels, larger-capacity center console and other distinct trim. Heated, 12-way power-adjustable (driver seat) leather seating is standard, along with a six-disc CD/MP3-capable audio system, Bose speaker system and heated windshield washer system. Crew cab SLT models add rain-sensing automatic windshield wipers and a rear-seat audio system. SLT interior color schemes include all-Ebony, Dark Titanium/Light Titanium and Dark Cashmere/Light Cashmere combinations.

Rear seat room is improved, along with increased comfort. Standard on crew cab models and available on extended cab models is a new, stadium-style rear seat with a 60/40-split design. It can be easily folded up to provide an uninterrupted load floor. Or, either section of the split seat can be stowed independently, allowing room for both cargo and a rear-seat passenger. Entry to the rear seat/storage area of extended cab models is eased with new rear access doors that open 170 degrees.

A variety of useful convenience items are available on SLE and SLT models, including a touch-screen navigation radio, power-operated sunroof, power-sliding rear window and XM Satellite Radio. A rear seat entertainment system is available on crew cab SLE2 and SLT models, and all models are available with a variety of radio systems.

Responsive driving experience

The 2007 GMC Sierra delivers enhanced stability and driving confidence from a new, boxed frame, coil-over-shock front suspensions and rack-and-pinion steering. Five suspension systems area available, each tailored to suit specific driving requirements. They include:

+ Z83 - Delivers a solid, smooth ride with monotube front shocks and twin-tube rear shocks.
+ Z85 - Designed for enhanced handling and trailer towing, with monotube front and rear shocks.
+ Z71 - Delivers enhanced off-road capability; features specific monotube front and rear shocks.
+ Z60 - Designed for maximum street performance and offered with 20-inch wheels.
+ NHT - Maximum capacity trailering.

GM's sophisticated StabiliTrak electronic stability control system helps mitigate the occurrence of rollover events; it is standard on crew cab models and available on extended cab models - and is a segment exclusive. Partnered with an improved, high capacity brake system and four-channel, four-sensor electronic brake controls, the system provides more precise, controlled ABS stops, as well as enhanced traction/yaw stability.

Sierra models are powered by an efficient lineup of engines, led by the segment's highest-rated V-8 engines. Advanced technology, such as Active Fuel Management (AFM) and variable valve timing (VVT), helps Sierra deliver the segment's best fuel economy. A FlexFuel engine is available - and partnered with fuel-saving AFM - giving customers the choice of powering their truck with E85 ethanol, gasoline or a combination of both fuels. Light-duty engine offerings include:

+ 4.3L V-6 (LU3), rated at 195 hp (145 kW) and 260 lb.-ft. of torque (353 Nm). It is standard on work truck regular cab and 2WD extended cab models.
+ 4.8L V-8 (LY2), with iron block; rated at 295 hp (220 kW) and 305 lb.-ft. of torque (414 Nm). It is standard on work truck 4WD extended cab, SLE1 regular cab and extended cab models, and work truck and SLE1 crew cab models.
+ 5.3L FlexFuel V-8 (LMG), E85-capable with iron block and Active Fuel Management, rated at 315 hp (235 kW) and 338 lb.-ft. of torque (458 Nm). This engine is available on all models.
+ 5.3L FlexFuel V-8 (LC9), E85-capable with aluminum block and Active Fuel Management, rated at 315 hp (235 kW) and 338 lb.-ft. of torque (458 Nm). This engine is available on all models.
+ 5.3L V-8 (LH6), with aluminum block and Active Fuel Management, rated at 315 hp (235 kW) and 338 lb.-ft. of torque (458 Nm). It is available on crew cab 4WD models.
+ 5.3L V-8 (LY5), with iron block and Active Fuel Management, rated at 315 hp (235 kW) and 338 lb.-ft. of torque (458 Nm). This engine is standard on SLE2 and SLT models; it is available on all other models.
+ 6.0L V-8 (L76), with aluminum block, variable valve timing and Active Fuel Management, rated at 367 hp (274 kW) and 375 lb.-ft. of torque (508 Nm). It is available on SLE and SLT extended and crew cab models as part of the enhanced trailering package.
+ 6.2L V-8 (L92), with aluminum block and variable valve timing, rated at 400 hp (298 kW) and 417 lb.-ft. of torque (565 Nm). This engine is exclusive to Sierra Denali.

The engines are backed by proven Hydra-Matic electronically controlled automatic transmissions, including the proven 4L60 four-speed automatic, high capacity 4L70 four-speed automatic and a new 6L80 six-speed with the Sierra Denali's 6.2L engine. The six-speed automatic has a wide, 6.04:1 overall ratio - including two overdrive gears - that helps deliver an excellent balance of performance and fuel economy. Also, the 6L80 has a "tap up/tap down" capability that allows the driver to manually select upshifts and downshifts with a button on the column shifter.

Safety and security

Sierra delivers a perimeter of safety protection through a stronger frame and body structure as well as industry- and segment-leading technology. It also is designed to provide increased compatibility with other vehicles. New features include segment-first StabiliTrak electronic stability control with rollover mitigation technology, roof-mounted head curtain side air bags, which are integrated into strengthened chassis and body structures to provide excellent passenger protection, and segment-first safety belt pretensioners that activate during a rear-end crash. The head curtain side air bags are available on Sierra SLE and SLT models.

Driver control dynamics are enhanced by wider front and rear tracks, as well as more responsive suspensions - including a new coil-over-shock front suspension design and rack-and-pinion steering. Additional safety features are offered on Sierra, including factory-installed remote vehicle starting (segment exclusive), Autotrac active transfer case to help keep the vehicle sure-footed in slippery driving situations, Ultrasonic Rear Parking Assist and a revised, easier-to-use tire pressure monitoring system.

All retail models come standard with the OnStar Generation 7 system, including a one-year subscription to the Safe & Sound plan. The OnStar service includes the General Motors Advanced Automatic Crash Notification (AACN) system, making crash data available to emergency services to potentially dispatch the appropriate life-saving personnel and equipment to crash scenes faster. If the vehicle is in a crash that activates an air bag, the OnStar system automatically notifies an OnStar advisor, who will check on the occupants or summon emergency help if necessary. OnStar also can assist authorities in locating a vehicle if it is reported stolen and provides remote door-unlocking service (when the vehicle is equipped with power door locks).

Sierra Denali details

The unique Sierra Denali is a truck like no other, with enhanced features and craftsmanship that distinguish it from other models - as well as offerings from other manufacturers. It is a comprehensive package of performance, amenities and style that delivers a powerful, understated elegance unique to GMC. The '07 model remains instantly identifiable, with its iconic, Denali-specific signature chrome grille. Additional chrome trim and body-color bumpers further distinguish it. Sierra Denali is available in three exterior colors: Onyx Black, Olympic White and Fine Silver Birch Metallic.

The Sierra Denali is powered by an exclusive, 400-horsepower (298 kW) 6.2L V-8 engine, with a six-speed automatic transmission and either 2WD or all-wheel drive. It also features a 9.5-inch rear axle (2WD) or 8.6-inch rear axle (AWD) with 3.42 gears and a locking rear differential. Chassis features including the Z85 suspension, four-wheel disc brakes and StabilTrak are standard, along with skid plates and tow hooks. Eighteen-inch polished aluminum wheels are standard and unique 20-inch factory installed chrome-finish aluminum wheels are available. The wheel designs are not shared with other Sierra models.

Sierra Denali also offers a unique combination of interior style and luxury, including standard nuance leather-covered front and rear seats, with heated, 12-way power-adjustable front seats, as well as leather trim throughout. A Denali-exclusive leather-wrapped steering wheel, which features wood grain accents and a host of auxiliary controls, is standard. Denali models also feature a unique center console, enhanced interior bright work and detailed, highly finished embossed sill plates that greet passengers when they open any of the Sierra Denali's doors. The unique center console has wood grain trim that conceals the lid and cupholder pockets, creating a more finished and refined appearance. In addition to a full complement of standard amenities, Sierra Denali offers exclusive features such as an available heated steering wheel. Interior colors include all-Ebony and an exclusive Cocoa/Light Cashmere combination.

Standard features include roof-mounted side curtain air bags, power-adjustable pedals, electrochromic (auto-dimming) inside mirror, dual-zone automatic climate control, rain-sensing automatic windshield wipers, remote starting system, EZ Lift Tailgate and Ultrasonic Rear Parking Assist. From an entertainment standpoint, Sierra Denali comes standard with an AM/FM MP3-capable radio with a six-disc in-dash CD changer, Bose premium speaker sound system, rear-seat audio and XM Satellite Radio.