The 2007 Silverado 2500HD is available in four models: WT, 1LT, 2LT, and LTZ. The WT and 1LT are available in Regular, Extended, and Crew Cab models, whereas the 2LT and LTZ are available in Extended and Crew Cab models.

The 2500HD is covered by a new vehicle limited warranty of three years or 36,000 miles and a powertrain warranty of five years or 100,000 miles, whichever comes first. The Silverado 2500HD competes with the likes of Ford F-Series, GMC Sierra, Nissan Titan, and Toyota Tundra.

All models are also available with the option of a Duramax Diesel 6.6-liter V-8 engine that delivers 365 hp @ 3,200 rpm and 660 lb-ft. @ 1,600 rpm. This engine is teamed with a standard Allison 1000 Series 6-speed automatic transmission with overdrive, Tap-Up/Tap-Down driver shift control, auto grade-braking, and Tow/Haul mode.

The Regular Cab Long Box models measure 224.7 inches in length and have a wheelbase of 133.0 inches. The Extended Cab Standard Box and Extended Cab Long Box models measure 230.3 and 249.2 inches in length and stand on a wheelbase of 143.5 and 157.5 inches respectively. The Crew Cab Standard Box and Crew Cab Long Box models are 239.9 and 258.7 inches in length respectively. They ride on a wheelbase of 153.0 and 167.0 inches, in that order.

The 2500HD’s front fascia looks impressive with a prominent bumper, a wide chrome surround grille with a bar in the center that sports the Chevy bow-tie and large, distinct headlamps. The 1LT and 2LT feature standard chrome front and rear step bumpers, which are optional on the WT. The 2500HD comes standard with daytime running lamps with an automatic exterior lamp control. Halogen fog lamps are standard on 2LT and LTZ, and optional on 1LT.

All models feature two-sided galvanized-steel body panels. All models excluding the WT come standard with body-color, body-side moldings. Flat, intermittent wipers are standard on all models. However, a heated windshield washer fluid system is standard on LTZ and optional on 2LT. The Crew Cab models of the LTZ also get the benefit of standard flat, intermittent wipers with Rainsense.

The WT comes with black foldaway mirrors, while all other models feature standard black foldaway, power, heated mirrors. The LTZ also features power, heated mirrors with turn-signal indicators in glass, driver-side auto-dimming, power-foldaway feature, and curb-tilt. This feature is optional on the 2LT. All Crew Cab models, with the exception of the WT, also have standard black luggage rack side rails.

The Silverado 2500HD is available with a pickup box in two sizes: standard and long. The standard pickup box is 78.9 inches in length, while the long box measures 97.8 inches long. The former has a cargo capacity of 60.7 cubic-feet, while the latter offers 75.5 cubic-feet. The pickup box also includes bulkhead dividers, two-tier loading, stake pockets, and four tie-down brackets.

The 2500HD comes standard with dual lamps in the cargo-area. All models are also offered with an optional cargo management system with four track-mounted sliding hooks in the pickup bed. Front recovery hooks are standard on LT and LTZ models and optional on the WT.

The Extended Cab models of the 2500HD have rear doors that open 170 degrees wide, while all Crew Cab models feature full-size rear doors. All models except the WT are also available with the option of EZ Lift Tailgate Package, which includes a lockable EZ lift tail-gate. The tailgate of the 2500HD features a theft-deterrent design. All Extended and Crew Cab models excluding the WT are available with an optional ultrasonic rear parking assist.

The WT wears standard 16-inch painted steel wheels, whereas the 1LT gets standard 16-inch chrome-styled steel wheels, which are optional on the WT. The 2LT features standard 16-inch polished forged-aluminum wheels, which are available as optional on the 1LT. The LTZ wears 17-inch bright machined-aluminum wheels, which are optional on the 2LT. All models except the LTZ roll on standard LT245/75R16E all-season, Blackwall tires. However, the LTZ rides on LT265/75R17E all-terrain, Blackwall tires.

The WT comes standard with 40/20/40 split-bench vinyl front seats with recliners, but is also available with the option of cloth front seats. The 1LT features standard 40/20/40 split-bench select cloth front seats with recliners, fold-down center armrest with storage, and lockable underseat storage. However, it is also offered with the option of custom leather-appointed front seats. The 2LT has standard reclining premium cloth front bucket seats with six-way power adjustments, but the option of custom leather-appointed front bucket seats is also available. The LTZ comes standard with reclining, heated, custom leather-appointed front bucket seats with 12-way power adjustments, two-position driver-side memory, power-recline, power bolsters, power lumbar, and floor console. The Extended Cab models of the WT variant come standard with flip-up, full-width bench rear seats, while the Crew Cab models of WT and Extended and Crew Cab models of 1LT, 2LT, and LTZ feature standard flip-up, 60/40 split-bench rear seats.

The Regular Cab models of WT come standard with climate control, but that includes only a heater. The 1LT features single-zone manual climate control, which is optional on the WT. The 2LT and LTZ offer higher levels of comfort with the dual-zone automatic climate controls, which are optional on the 1LT. All models except the WT have standard power door locks and power windows. However, the WT is available with the option of power door locks.

The WT features solar-ray light-tinted glass on all windows, whereas the other models come standard with solar-ray deep-tinted glass on rear and back windows. The Extended Cab models of the WT come standard with fixed-glass windows on the rear door. However, all models excluding the WT feature standard power windows on the full-drop rear door. All models except the WT are also available with the option of power side-sliding rear window.

The Silverado 2500HD comes standard with a tilt-wheel, adjustable steering column. All models excluding the WT come standard with a leather-wrapped steering wheel. The 2LT and LTZ even boast of steering wheel-mounted audio controls, which are optional on 1LT. The WT comes with a manual day/night rear-view mirror, whereas all other models feature an auto-dimming rear-view mirror with eight-point compass and outside temperature display. The 2LT and LTZ come standard with a center console with 20 liters of storage, two auxiliary power outlets, and two cup holders. A deluxe overhead console is standard across all models.

All models come standard with a driver information center (DIC) that gives information regarding the odometer, trip odometer, fuel range, average economy, fuel used, timer, transmission temperature, powertrain, security, and many more vehicle functions. All models come standard with dual covered 12-volt power outlets. Cruise control and electric defogger on the rear-window are standard on all models excluding the WT, on which it is optional. All models, except the WT, are available with optional power-adjustable accelerator and brake pedals. A remote vehicle starter system is standard on the LTZ and optional on 1LT and 2LT models. The Extended and Crew Cab models of 1LT, 2LT, and LTZ are available with an optional power-sliding sunroof with vent feature, which also includes retractable shade.

The Silverado 2500HD also comes loaded with a lot of standard and optional entertainment features to prevent you from getting bored on those long drives. The WT comes standard with an AM/FM stereo including seek-scan. The 1LT and 2LT have a standard AM/FM stereo with MP3-compatible CD player that also includes seek-scan, auto tone control, automatic volume, auxiliary MP3 input jack, a TheftLock, and a radio data system (RDS). All models excluding the WT are available with the option of XM Satellite Radio, which offers more than 69 channels of commercial-free music in digital-quality sound.

The LTZ features a standard AM/FM stereo with MP3-compatible in-dash six-disc CD-changer that includes seek-scan, auto tone control, auxiliary MP3 input jack, and RDS. This audio system is optional on 1LT and 2LT. The LTZ comes equipped with a Bose speaker system, which also includes subwoofer in the center console. It is available as optional on 2LT.

The LTZ is also offered with the options of a touch-screen navigation radio on its own or with a DVD player. Both include an AM/FM stereo with MP3-compatible CD player, voice recognition, DVD-based mapping, seek-scan, auto tone control, automatic volume, auxiliary MP3 input jack, and RDS. In addition, the touch-screen navigation radio with DVD player also includes an AM/FM stereo with MP3-compatible CD/DVD player. The Crew Cab models of 2LT and LTZ are also offered with an optional DVD entertainment system.

The 2500HD can handle a maximum payload of 3,892 pounds and it can tow up to 13,000 pounds of cargo.

The Vortec 6.0L V-8 engine produces a maximum power of 353 hp. It features variable valve timing (VVT) technology that optimizes combustion, enhances low-end torque and high-end power, promotes efficiency, and reduces emissions. It also offers the benefit of an electronic throttle control that provides outstanding throttle response, greater reliability, and improved efficiency. The Duramax diesel 6.6L V-8 engine churns out 365 hp of maximum power. Fuel is delivered to this engine through a Common Rail Direct Injection technology, which utilizes advanced electronics and pilots injection to optimize fuel delivery and help reduce emissions and combustion noise.

The Hydra-Matic 6-speed automatic transmission with overdrive, Tap-Up/Tap-Down driver shift control, auto grade-braking, and Tow/Haul mode helps deliver high-performance capabilities. A GM heavy-duty truck-exclusive Tap-Up/Tap-Down driver shift control feature on the gear shift lever allows the driver to manually select upshifts and downshifts. Also, a new sophisticated control module monitors the transmission to optimize shift quality and ensure consistently smooth performance. The Allison 1000 Series 6-speed automatic transmission with overdrive, Tap-Up/Tap-Down driver shift control, auto grade-braking, and Tow/Haul mode features shift stabilization, which helps reduce shift busyness while driving on mountainous terrain.

The Silverado 2500HD rides on Z85 Handling/Trailering suspension. All models except the WT are also available with the optional Z71 Off-Road Package suspension. Both the suspension systems are well-tuned to absorb the impact of jerks and uneven roads, thereby offering a smooth ride.

The 2500HD comes equipped with front and rear disc brakes with a four-wheel anti-lock braking system (ABS) and dynamic rear proportioning, a feature which optimizes braking performance under varying cargo load conditions. The LTZ comes standard with automatic locking rear differential, which is optional on other models. When rear-wheel slippage is detected, the automatic locking rear differential allows additional traction to the rear wheels. If one of the rear wheels has traction while the other does not, the locking rear axle automatically sends power to the wheel with grip to move the vehicle.

The 2500HD comes with a high ground clearance of 9.5 inches, which braces it up to take on challenging terrains with élan. However, a large turning diameter of 45.3 to 55.1 feet makes it a little difficult to be steered or parked in tight spots.

All models come standard with safety belt pre-tensioners, front airbags, a LATCH (lower anchors and top tethers for children) system for child safety seats, a PASSlock theft deterrent system, a tire pressure monitoring system, ABS, and OnStar including a one-year safe & sound plan. OnStar is an in-vehicle safety and security system created to help protect the occupants of a vehicle in emergency situations 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.

Remote keyless entry, including content-theft alarm, is standard on all models except the WT, on which it is optional. All models excluding the WT are also available with an optional Safety Package, which includes power-adjustable pedals and an ultrasonic rear parking assist.