The 2007 GMC Sierra 3500 is a full-size pickup truck from General Motors. It is offered in 2-wheel drive (2WD) and 4-wheel drive (4WD) versions.

The Sierra 3500 is available in three models: Regular Cab, Extended Cab, and Crew Cab. All these are available with a standard pickup box, the 97.6-inch Long Box.

The Regular Cab is available in two trims: the Work Truck and SLE1, while the Extended Cab and Crew Cab are available in four trims each: the Work Truck, SLE1, SLE2, and SLT. All trims come with different seating configurations.

The Sierra 3500 comes with a powertrain warranty for five years or 100,000 miles and a bumper-to-bumper limited warranty for three years or 36,000 miles.

Its major competitors are the Dodge Ram 1500, Ford F-150, Nissan Titan, and Toyota Tundra.

All trims of the 3500 derive power from a standard Vortec 6.0-liter V-8 engine, which delivers 353 hp and 373 lb-ft. of torque. Fuel is delivered to this engine through a Sequential Fuel Injection (SFI). This engine is linked to a standard electronically-controlled, heavy-duty, 6-speed automatic transmission with overdrive and tow/haul mode.

All trims are also available with the option of a Duramax 6.6-liter Turbo Diesel V-8 engine, which generates up to 365 hp and 660 lb-ft. of torque. This engine is coupled with an electronically-controlled Allison 1000 6-speed automatic transmission with overdrive, electronic engine grade braking, and tow/haul mode.

Despite being brawny and tough, there is something about the Sierra 3500’s appearance that warrants a second look. It comes with a wide stance and long, smooth lines. The Regular Cab, Extended Cab, and Crew Cab measure 225.0, 249.2, and 258.7 inches and ride on a wheelbase of 133.0, 157.5, and 167 inches respectively.

The front-end of the 3500 is adorned by a prominent chrome bumper, chrome grille surround, and dual halogen composite headlamps, including automatic exterior lamp control and flash-to-pass feature. The large grille sports the bold GMC insignia in its middle. Daytime running lamps with automatic exterior lamp control and a black air dam are also standard on all trims. The SLE1, SLE2, and SLT also feature standard front halogen fog lamps, which are optional on the Work Truck. All trims also come with dual lamps in the cargo area for ease of loading and unloading cargo.

The profile of SLE1, SLE2, and SLT is beautified by body-color body-side moldings. The rear of the 3500 also looks impressive with a step-style rear chrome bumper with pad. All trims come standard with a pickup box that measures 97.6 inches. Two front frame-mounted recovery hooks are standard on all trims. All trims are also available with the option of a cargo management system, which includes aluminum front and side C-channel rails located in the pickup box and four adjustable tie-down hooks. The SLE1, SLE2, and SLT are available with the option of roof-mounted luggage rack side rails. A top-of-tailgate protection cap is a standard feature for all 3500 trims.

The Work Truck comes with manual-folding side mirrors, while the other trims are standard with power-adjustable, manual-folding, heated side mirrors. The SLT comes standard with a heated windshield washer fluid system, which is optional on the SLE2. Front intermittent wipers are standard on all trims.

The 3500 is available with various kinds of stylish wheels, such as 16-inch painted steel wheels, 16-inch chrome-clad steel wheels, 17-inch bright machined aluminum wheels, and 16-inch painted steel wheels. The 3500 also offers a wide choice of tires, which includes LT215/85R16E all-season Blackwall tires, LT215/85R16E on-road/off-road Blackwall tires, and LT265/75R17E all-terrain Blackwall tires.

The 3500 comes with comfortable interiors loaded with convenience features. The Regular Cab offers seating for a maximum of three passengers, while the Extended and Crew Cab can seat up to six passengers each.

The Work Truck and SLE1 come with a 3-passenger 40/20/40 split-bench front seat with driver and passenger manual reclining, outboard head restraints, and center fold-down armrest with storage. The Work Truck features vinyl-trimmed seats, while the SLE1 comes with select cloth-trimmed seats.

The SLE2 comes with reclining bucket seats in the front, which include 6-way power driver and front passenger seat adjusters, front passenger manual lumbar and recline, adjustable outboard head restraints, and storage pockets. These seats are available in premium cloth and leather seating surfaces.

The SLT boasts of full-feature bucket front seats, including 12-way power driver and passenger seat adjusters, a 4-way power lumbar control, power bolsters, heated seat cushions and seatbacks, 2-position driver memory, adjustable outboard head restraints, floor console, and storage pockets. The SLT comes with leather-appointed seating surfaces.

The Extended Cab Work Truck trim comes with a 3-passenger, full-width rear bench seat, which can be folded. All other trims, except for the Regular Cab models or Extended Cab Work Truck, feature a standard 3-passenger 60/40 folding bench rear seat, which can be folded up.

Manual, dual-zone air-conditioning, with individual climate settings for driver and right front passenger is standard on the Work Truck and SLE1, and optional on SLE2 and SLT, which come standard with automatic, dual-zone air-conditioning, with individual climate settings for driver and right front passenger. The SLE1, SLE2, and SLT feature standard power door locks and power windows. Power door locks are optional on the Work Truck.

The SLE1, SLE2, and SLT feature a leather-wrapped steering wheel with a theft-deterrent locking feature. All trims come with a tilt-adjustable steering column, which also includes brake/transmission shift interlock. The Work Truck comes with a steering wheel, which includes a theft-deterrent locking feature. Steering wheel-mounted radio controls, which provide access to an enhanced driver information center and a radio, are standard on the SLE2 and SLT.

All trims also feature a driver information center, which flashes alerts such as "turn signal on" and "door ajar" and even provides a reminder for an oil change. A floor console, including storage compartment and dual cup-holders, is standard on the SLE2 and SLT, and optional on SLE1. An overhead mini console, however, is standard on SLE1, SLE2, and SLT.

The Work Truck features a manual day/night inside rear-view mirror, while the other trims come with a light-sensitive auto dimming inside rear-view mirror, with an 8-point compass and outside temperature indicator. The Work Truck features solar-ray light-tinted glass on all windows, while the SLE1, SLE2, and SLT come with solar-ray deep-tinted glass on all windows except light-tinted glass on the windshield, and driver and front passenger side-windows. The option of deep-tinted glass is also available on the Work Truck. Rear-quarter swing-out windows are standard on all the trims, while sliding, deep-tinted rear windows are optional on all. Electric defogger on the rear-window is standard on SLE1, SLE2, and SLT, and optional on Work Truck.

All trims feature two dash-mounted auxiliary 12-volt power outlets. The SLE1 and SLE2 are available with the option of a power sunroof, which allows you to enjoy the breeze and lets the sunlight stream into the cabin. Electronic cruise control with set and resume speed is standard on the SLE1, SLE2, and SLT, and optional on the Work Truck. Ultrasonic rear parking assist with rear-view LED display and audible warning is optional on the SLE1, SLE2, and SLT trim levels of Extended Cab and Crew Cab models.

The maximum cargo capacity of the 3500 pickup box is 75.5 cubic feet. It can tow up to 13,000 pounds of cargo and can handle a maximum payload of 5,307 pounds.

The 3500 offers a plethora of entertainment options to save you from boredom as you tow/haul cargo or simply go for a drive. The Work Truck features an audio system, which includes an AM/FM stereo and seek-and-scan. The SLE1 and SLE2 come with an audio system with MP3 compatible CD player, including an AM/FM stereo, seek-and-scan, auto-tone control, Radio Data System (RDS), speed-compensated volume control, and TheftLock. The SLT boasts of an audio system with MP3 compatible 6-disc in-dash CD player, including an AM/FM stereo, seek-and-scan, auto-tone control, and RDS.

Some other entertainment options available on the 3500 include an audio system with MP3 compatible CD/DVD player, an audio system with navigation, an XM satellite radio, and a Bose premium speaker system. An entertainment system, comprising of a rear-seat DVD player with LCD display and two sets of wireless headphones is available on all Crew Cab models.

The 3500 is available in a standard 2WD and optional AWD layout. The AWD gives enhanced traction to the 3500 wheels on slippery terrains.

The 3500 is powered by a Vortec 6.0-liter V8 engine, which delivers an impressive 353 horsepower and decent acceleration for driving on all kinds of roads. It is mated to a responsive electronically-controlled, heavy-duty, 6-speed automatic transmission with overdrive and tow/haul mode. The tow/haul mode reduces shift busyness while towing or hauling and provides auto grade braking. The optional Duramax 6.6-liter Turbo Diesel V-8 engine, which issues 365 horsepower and 660 lb-ft. of torque, offers a sprightly performance and is better-suited to towing or hauling jobs as compared to the 6.0L V-8.

The 3500 is navigated by a recirculating ball power steering, which gives direct and prompt responses. It rides on an independent front suspension, including torsion bars, while the rear suspension consists of 3-stage springs. This supple suspension is capable of swallowing bumps on roads and offers confident handling with minimum body-roll during turning.

Sharp 4-wheel anti-lock, 4-wheel disc brakes bring the 3500 to a quick halt at short distances. It is also available with the option of heavy-duty automatic locking rear differential, which evenly distributes power to both rear wheels in slippery conditions. At lower speeds, the differential automatically detects wheel spin, locks the rear axle, and directs torque to the rear wheel with more traction.

With a turning diameter of more than 45 feet, you might find it difficult to park or maneuver the 3500 in tight spots. But otherwise, it offers responsive handling and a smooth, quiet ride.

The 2007 GMC Sierra 3500 earned five stars, the highest possible rating, in front-impact crash test from the U.S. National Highway Traffic Safety Administration.

It comes standard with frontal airbags for the driver and right front-passenger. However, you will mind the absence of side impact airbags.

Some other safety features on the 3500 include 4-wheel anti-lock brakes, PASSkey III Plus theft-deterrent system, and an ultrasonic rear parking assist. Remote keyless entry, including two transmitters, panic button, and content theft alarm, is standard on all trims, except for the Work Truck.

The 3500 also comes with OnStar with one-year Safe and Sound Service. OnStar is an in-vehicle safety and security system created to help protect passengers on the road. OnStar's innovative three-button system offers 24-hour access to expertly trained and caring advisors, a connection to emergency assistance, and access to OnStar hands-free calling.