2021 GMC Sierra 3500HD Specs & Features
| Overview | Starting MSRP $66,100 |
|---|---|
| Engine Type | Gas |
| Transmission | 6-speed shiftable automatic |
| Drive Type | Four wheel drive |
| Cylinders | V8 |
| Total Seating | 5 |
| Basic Warranty | 3 yr./ 36,000 mi. |
| Fuel & MPG | |
|---|---|
| Fuel type | Regular unleaded |
| Range in miles (city/hwy) | 0/0 mi. |
| Fuel tank capacity | 36.0 gal. |
| Engine | |
|---|---|
| Base engine size | 6.6 L |
| Cylinders | V8 |
| Base engine type | Gas |
| Horsepower | 401 hp @ 5,200 rpm |
| Torque | 464 lb-ft @ 4,000 rpm |
| Valves | 16 |
| Cam type | Overhead valves (OHV) |
| Valve timing | Variable |
| Direct injection | yes |
| Towing & Hauling | |
|---|---|
| Max Towing Capacity | 20,000 lbs. |
| Max Payload Capacity | 4,365 lbs. |
| Drivetrain | |
|---|---|
| Transmission | 6-speed shiftable automatic |
| Drive type | Four wheel drive |
| On demand 4WD | yes |
| Electronic hi-lo gear selection | yes |
| Automatic locking hubs | yes |
| Rear locking differential | yes |
| Descent control | yes |
| Suspension | |
|---|---|
| Front independent suspension | yes |
| Stabilizer bar stabilizer bar | yes |
| Dimensions | |
|---|---|
| Length | 250.1 in. |
| Overall width without mirrors | 81.9 in. |
| Height | 80.9 in. |
| Wheelbase | 158.9 in. |
| Bed length | 82.2 in. |
| Turning circle | 52.7 ft. |
| Ground clearance | 11.2 in. |
| Curb weight | 6,947 lbs. |
| Maximum towing capacity | 20,000 lbs. |
| Maximum payload | 4,365 lbs. |
| Gross weight | 11,350 lbs. |
| Country of final assembly | United States |
| Colors | |
|---|---|
| Exterior Colors |
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| Interior Colors |
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| Front Seat Dimensions | |
|---|---|
| Front head room | 43.0 in. |
| Front leg room | 44.5 in. |
| Front shoulder room | 66.0 in. |
| Front hip room | 61.2 in. |
| Premium leather | yes |
| Bucket front seats | yes |
| 8-way power driver seat | yes |
| Height adjustable driver seat | yes |
| Driver seat with power adjustable lumbar support | yes |
| 2 memorized driver seat settings | yes |
| 8-way power passenger seat | yes |
| Height adjustable passenger seat | yes |
| Passenger seat with power adjustable lumbar support | yes |
| Multi-level heating driver seat | yes |
| Multi-level heating passenger seat | yes |
| Ventilated driver seat | yes |
| Ventilated passenger seat | yes |
| Rear Seat Dimensions | |
|---|---|
| Rear head room | 40.1 in. |
| Rear leg room | 43.4 in. |
| Rear shoulder room | 65.3 in. |
| Rear hip room | 60.2 in. |
| Split-folding rear seatback | yes |
| Folding with storage center armrest | yes |
| Multi-level heating | yes |
| Safety | |
|---|---|
| Blind spot and lane departure warnings accident avoidance system | yes |
| Rear cross traffic alert | yes |
| Pre-collision safety system | yes |
| Post-collision safety system | yes |
| Dual front side-mounted airbags | yes |
| Front and rear head airbags | yes |
| Passenger airbag occupant sensing deactivation | yes |
| Stability control | yes |
| Traction control | yes |
| Child seat anchors | yes |
| Rear door child safety locks | yes |
| 4-wheel ABS | yes |
| Front and rear ventilated disc brakes | yes |
| Tire pressure monitoring | yes |
| Dusk sensing headlamps | yes |
| Auto delay off headlamps | yes |
| LED headlamp | yes |
| Daytime running lights | yes |
| Front fog/driving lights | yes |
| Turn signal mirrors | yes |
| 2 front headrests | yes |
| Front height adjustable headrests | yes |
| 2 rear headrests | yes |
| Rear height adjustable headrests | yes |
| Rear center 3-point belt | yes |
| Engine immobilizer | yes |
| In-Car Entertainment | |
|---|---|
| AM/FM stereo | yes |
| Bose premium brand speakers | yes |
| 7 total speakers | yes |
| 1 subwoofer(s) | yes |
| Android Auto/Apple CarPlay | yes |
| USB connection | yes |
| Auxiliary audio input and USB with external media control | yes |
| Memory card slot | yes |
| Satellite radio satellite radio | yes |
| Speed sensitive volume control | yes |
| Power Feature | |
|---|---|
| 4 one-touch power windows | yes |
| Hands-free entry | yes |
| Reverse tilt dual mirrors provides curb view when vehicle in reverse | yes |
| Heated mirrors | yes |
| Comfort & Convenience | |
|---|---|
| Keyless ignition | yes |
| Tilt and telescopic steering wheel | yes |
| Audio and cruise controls on steering wheel | yes |
| Power steering | yes |
| Front, side, and rear view camera | yes |
| Front and rear parking sensors | yes |
| Wireless charging | yes |
| Cruise control | yes |
| Universal remote transmitter (for garage door, security system, etc.) | yes |
| Front and rear cupholders | yes |
| Front and rear door pockets | yes |
| Front seatback storage | yes |
| Leather steering wheel | yes |
| Heated steering wheel | yes |
| Dual zone front climate control | yes |
| Rear ventilation ducts | yes |
| Sun sensor | yes |
| Dual illuminating vanity mirrors | yes |
| Electrochromatic inside rearview mirror | yes |
| Turn signal in mirrors | yes |
| Instrumentation | |
|---|---|
| Trip computer | yes |
| Compass | yes |
| External temperature display | yes |
| Tachometer | yes |
| Clock | yes |
| Tires & Wheels | |
|---|---|
| Polished alloy wheels | yes |
| 20 in. wheels | yes |
| All terrain tires | yes |
| LT275/65R20 tires | yes |
| Fullsize non-matching spare tire | yes |
| Underbody mounted spare tire | yes |
| Telematics | |
|---|---|
| Emergency Service | yes |
| Airbag Deployment Notification | yes |
| Stolen Vehicle Tracking/Assistance | yes |
| Hands-Free Calling | yes |
| Roadside Assistance | yes |
| Concierge Service | yes |
| Destination guidance (also Turn-by-Turn Navigation) | yes |
| Destination Download | yes |
| Warranty | |
|---|---|
| Basic | 3 yr./ 36,000 mi. |
| Drivetrain | 5 yr./ 60,000 mi. |
| Rust | 6 yr./ 100,000 mi. |
| Roadside assistance | 5 yr./ 60,000 mi. |
| Free maintenance | 1 yr./ unlimited mi. |
| Mechanical Options | |
|---|---|
| Engine Block Heater | +$100 |
| Heavy Duty Front Spring/Camper Package | +$45 |
| Duramax 6.6L Turbo-Diesel V8 Engine | +$9,750 |
| Trailer Tire Pressure Monitor Sensors | +$50 |
| 220 Amp Alternator | +$150 |
| Gooseneck Hitch Package | +$295 |
| Trailering Wiring Provisions | +$35 |
| Auxiliary Battery | +$135 |
| Dual Alternators | +$380 |
| Gooseneck/5th Wheel Prep Package | +$545 |
| High Idle Switch | +$200 |
| Packages | |
|---|---|
| Snow Plow Prep/Camper Package | +$300 |
| Denali Ultimate Package | +$1,770 |
| Denali Black Diamond Edition | +$2,990 |
| Technology Package | +$1,475 |
| GMC Protection Package | +$370 |
| Cargo Convenience Package | +$515 |
| Interior Options | |
|---|---|
| Rear Under Seat Storage | +$275 |
| All-Weather Floor Liner | +$210 |
| Lockable Console Vault | +$295 |
| Premium Front Floor Liners | +$130 |
| Exterior Options | |
|---|---|
| GMC MultiPro Tailgate Step Lights | +$200 |
| Body Color Wheel Arch Moldings | +$685 |
| 20" Chrome Aluminum Wheels | +$2,995 |
| Bedside Storage Boxes | +$1,250 |
| Auxiliary Trailer Camera | +$595 |
| 20" High Gloss Black Aluminum Wheels w/Machined Finish | +$1,995 |
| 20" Chrome Aluminum Wheels | +$2,995 |
| MultiPro Audio System by Kicker | +$815 |
| Front License Plate Kit | +$0 |
| Power Glass Sunroof | +$995 |
| 20" High Gloss Black Painted Wheels | +$1,995 |
| Tri-fold Soft Tonneau Cover | +$700 |
| Power Retractable Assist Steps | +$1,100 |
| Black Front and Rear Molded Splash Guards | +$190 |
| Cargo Tie-Down Rings | +$105 |