2021 GMC Sierra 3500HD CC 4WD Automatic

• Bumper, front chrome lower
• Bumper, rear, delete
• Door handles, Black grained
• Glass, solar absorbing, tinted
• Grille (Chrome surround with Black mesh.)
• Headlamps, LED reflector with incandescent turn signals and LED signature Daytime Running Lamps
• Lamps, cargo area, cab mounted integrated with center high mount stop lamp with switch in bank on left side of steering wheel
• Mirrors, outside high-visibility vertical trailering lower convex mirrors, manual-folding/extending (extends 3.31 [84.25mm]), molded in Black
• Moldings, beltline, Black
• Smoked Amber LED roof marker, (LED)
• Spare tire delete. Deletes the spare tire and wheel.
• Tires, LT235/80R17E all-season highway, blackwall
• Wheel trim, painted center caps
• Wheels, 17 (43.2 cm) painted steel

• Air conditioning, single-zone
• Air vents, rear (Not available with Regular Cab model.)
• Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
• Audio system feature, 6-speaker system (Requires Crew Cab model.)
• Audio system, GMC Infotainment System with 7 diagonal color touch-screen, AM/FM stereo with seek-and-scan and digital clock, includes Bluetooth streaming audio for music and select phones; featuring wired Android Auto and Apple CarPlay capability for compatible phones
• Back-up alarm calibration. This calibration will allow installation of an aftermarket back-up alarm by disabling rear perimeter lighting
• Bluetooth for phone, connectivity to vehicle infotainment system
• Door locks, power (Standard on Crew Cab models.)
• Driver Information Center, 3.5 diagonal monochromatic display
• Exterior Temperature Display, located in radio display
• Floor covering, rubberized-vinyl (Not available with LPO floor liners.)
• Instrument cluster 6-gauge cluster featuring speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure
• Mirror, inside rearview, manual tilt
• Power outlet, front auxiliary, 12-volt
• Seat adjuster, driver 4-way manual
• Seat adjuster, passenger 4-way manual
• Seat, rear 60/40 folding bench (folds up), 3-passenger, (includes child seat top tether anchor) (Not available with Regular Cab model.)
• Seats, front 40/20/40 split-bench with upper covered armrest storage and fixed lumbar (Standard on Crew Cab models only.)
• Steering column, Tilt-Wheel, manual with wheel locking security feature
• Steering wheel, urethane
• USB ports, 2 (first row) located on instrument panel
• Vinyl seat trim
• Window, power front, drivers express up/down (Standard on Crew model.)
• Window, power front, passenger express down (Standard on Crew Cab models.)
• Windows, power rear, express down (Not available on Regular Cab models.)

• Air filter, heavy-duty
• Air filtration monitoring
• Alternator, 170 amps (Requires (L8T) 6.6L V8 gas engine.)
• Auto-locking rear differential
• Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr, maintenance-free with rundown protection and retained accessory power (Included and only available with (L8T) 6.6L V8 gas engine.)
• Body, Chassis Cab
• Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
• Capped Fuel Fill
• Cooling, auxiliary external transmission oil cooler
• Cooling, external engine oil cooler
• Engine, 6.6L V8 with Direct Injection and Variable Valve Timing, gasoline, (401 hp [299 kW]
• Four wheel drive
• Frame, fully-boxed, hydroformed front section and an open C rear section
• Fuel tank, front and rear, 63.5 gallon (240 liters)
• GVWR, 14,000 lbs. (6350 kg)
• Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
• Recovery hooks, front, frame-mounted, black
• Steering, Recirculating Ball with smart flow power steering system
• Suspension Package
• Transfer case, two-speed, electronic shift with push button controls (Requires 4WD models.)
• Transmission, 6-speed automatic, heavy-duty

• Airbags, Dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbag (Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)
• Brake lining wear indicator
• Daytime Running Lamps, LED signature lighting
• Rear Seat Reminder (Requires Crew Cab model.)
• StabiliTrak, stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and hill start assist
• Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. It can limit certain available vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver
• Tire Pressure Monitoring System with Tire Fill Alert (does not apply to spare tire)

Model Highlights

The Sierra HD comes in one of several different body styles with long and short bed options. However, despite this complexity there are only two available engines, both V8 units displacing 6.6 liters. The gasoline option is paired to a 6-speed automatic and makes 401 horsepower and 464 lb-ft of torque. The more expensive diesel engine is aided by a turbocharger and makes 445 horsepower and a massive 910 lb-ft of torque. Unlike the gasoline engine, the diesel is mated to a 10-speed automatic to handle all that torque. When properly equipped, a Sierra HD 3500 should be able to tow up to 35,000lbs with a 5th wheel attachment, or 20,000 lbs with a traditional trailer hitch, thanks in large part to the massive torque produced by its diesel V8. Sierra HD models are available with either rear-wheel drive of selectable four-wheel drive. The Sierra HD comes in either 2500 form or 3500 form with 3500 versions offering a bit more towing capacity and payload because they can be optioned with a "dually" setup, giving the truck an extra pair of wheels on the rear axle. Both trucks can be optioned with a regular cab, a double cab featuring four conventional doors, or a crew cab with even bigger rear seats. Truck beds are either 6'9" or 8' depending on configuration, though the only restriction to bed size is in the regular cab version, which always comes with the longer bed. In addition to copious options for the basic architecture of the truck, Sierra buyers are also offered plenty of choices when it comes to the tech in their new vehicle. GMC's ProGrade Trailering system features fifteen camera views to help keep an eye on things behind the truck, even counting a class exclusive transparent trailer view among its features. The available heads up display on the Sierra HD is massive, measuring 15-inches across, while the rear-view mirror can be switched between displaying an actual mirror and the view from the rearward facing camera. GM claims their MultiPro tailgate is the world's first six-function tailgate. In practice that means it's easy to load things into and out of the back of the truck, while also providing a ton of utility options for carrying loads with the tailgate dropped. It also has a built-in step to make it easier to climb in and out of the bed of the truck. Concentrating on off-roading capabilities, 4AT models come standard with four-wheel drive along with a more off-road biased suspension setup that includes Rancho Shocks. Other standard features on the 4AT include skid plates, an Eaton locking differential, Michelin all-terrain tires, a heads-up display, GMC's HD Surround Vision camera system, hill descent control and an off road mode. Most buyers though, will probably opt for the Denali version of the Sierra HD. Available in both 2500 and 3500 forms, Denali versions of the Sierra HD come standard with the bigger crew cab, body colored front and rear bumpers, LED lights in the cargo bed, tinted glass, LED headlights, daytime running, front fog and taillights, powered external mirrors, a MultiPro tailgate, UltraSonic front and rear parking sensors, Lane Departure Warning, Lane Change Alert with Automatic Braking, Rear Cross-Traffic Alert, Following Distance Indicator and Hill Descent Control (HDC). The Denali Interior features include, 4G LTE Wi-Fi, Bluetooth and Apple CarPlay\Android Auto connectivity, an 8-inch infotainment screen and an 8-inch digital instrument cluster, an 8 speaker Richbass sound system, dual-zone climate control, heated front and rear seats, vented front seats, a heated steering wheel, keyless start and wireless device charging.