2021 GMC Sierra 3500HD Specs & Features
| Overview | Starting MSRP $44,500 |
|---|---|
| Engine Type | Gas |
| Transmission | 6-speed shiftable automatic |
| Drive Type | Four wheel drive |
| Cylinders | V8 |
| Total Seating | 6 |
| Basic Warranty | 3 yr./ 36,000 mi. |
| Drivetrain | |
|---|---|
| automatic locking hubs | yes |
| electronic hi-lo gear selection | yes |
| part time 4WD | yes |
| Drive type | Four wheel drive |
| Rear locking differential | yes |
| Transmission | 6-speed shiftable automatic |
| Fuel & MPG | |
|---|---|
| Fuel tank capacity | 36.0 gal. |
| Fuel type | Regular unleaded |
| Range in miles (cty/hwy) | 0/0 mi. |
| Engine | |
|---|---|
| direct injection | yes |
| Base engine size | 6.6 l |
| Base engine type | Gas |
| Cam type | Overhead valves (ohv) |
| Cylinders | V8 |
| Horsepower | 401 hp @ 5,200 rpm |
| Torque | 464 lb-ft @ 4,000 rpm |
| Turning circle | 52.7 ft. |
| Valve timing | Variable |
| Valves | 16 |
| Towing & Hauling | |
|---|---|
| Max Towing Capacity | 20,000 lbs. |
| Max Payload Capacity | 4,398 lbs. |
| Safety | |
|---|---|
| 2 front headrests | yes |
| 3 rear headrests | yes |
| LED headlamp | yes |
| auto delay off headlamps | yes |
| child seat anchors | yes |
| daytime running lights | yes |
| dual front side-mounted airbags | yes |
| dusk sensing headlamps | yes |
| engine immobilizer | yes |
| front and rear head airbags | yes |
| stability control | yes |
| tire pressure monitoring | yes |
| traction control | yes |
| 4-wheel ABS | yes |
| Front and rear ventilated disc brakes | yes |
| Front center 3-point belt | yes |
| Passenger airbag occupant sensing deactivation | yes |
| Rear center 3-point belt | yes |
| Rear door child safety locks | yes |
| Rear height adjustable headrests | yes |
| Packages | |
|---|---|
| Snow Plow Prep/Camper Package | +$300 |
| Convenience Package | +$1,310 |
| Convenience Package w/Pickup Bed Delete | +$1,310 |
| X31 Off-Road Package | +$525 |
| In-Car Entertainment | |
|---|---|
| 6 total speakers | yes |
| USB connection | yes |
| USB with external media control | yes |
| speed sensitive volume control | yes |
| AM/FM stereo | yes |
| Comfort & Convenience | |
|---|---|
| front and rear cupholders | yes |
| front door pockets | yes |
| power steering | yes |
| rear view camera | yes |
| tilt-adjustable steering wheel | yes |
| Single zone front air conditioning | yes |
| Power Feature | |
|---|---|
| 4 one-touch power windows | yes |
| power door locks | yes |
| Heated mirrors | yes |
| Interior Options | |
|---|---|
| SiriusXM Radio | +$100 |
| Upfitter Switch Kit | +$150 |
| All-Weather Floor Liner | +$210 |
| Cruise Control | +$225 |
| Color-Keyed Carpet Floor Covering | +$100 |
| 120-Volt Instrument Panel Power Outlet | +$225 |
| OnStar and GMC Connected Services Capable | +$175 |
| Instrumentation | |
|---|---|
| clock | yes |
| external temperature display | yes |
| tachometer | yes |
| trip computer | yes |
| Front Seat Dimensions | |
|---|---|
| 4 -way manual driver seat adjustments | yes |
| 4 -way manual passenger seat adjustment | yes |
| 40-20-40 split bench front seats | yes |
| vinyl | yes |
| Front head room | 43.0 in. |
| Front hip room | 61.2 in. |
| Front leg room | 44.5 in. |
| Front shoulder room | 66.0 in. |
| Rear Seat Dimensions | |
|---|---|
| folding center armrest | yes |
| rear ventilation ducts | yes |
| Rear head room | 40.1 in. |
| Rear hip Room | 60.2 in. |
| Rear leg room | 43.4 in. |
| Rear shoulder room | 65.3 in. |
| Split-folding rear seatback | yes |
| Exterior Options | |
|---|---|
| GMC MultiPro Tailgate | +$445 |
| Black Assist Step | +$450 |
| GMC MultiPro Tailgate Step Lights | +$200 |
| 18" Machined Aluminum Wheels w/Dark Grey Metallic Accents | +$300 |
| Deep-Tinted Glass | +$200 |
| Bed View Camera | +$250 |
| LT275/70R18 All-Terrain Blackwall Spare Tire | +$380 |
| Spray-On Bed Liner | +$545 |
| 6" Rectangular Black Tubular Assist Steps | +$775 |
| LED Cargo Area Lighting | +$125 |
| 4" Round Black Tubular Assist Steps | +$775 |
| Front License Plate Kit | yes |
| Outside Heated Power-Adjustable Mirrors | +$50 |
| Smoked Amber LED Roof Marker Lamps | +$55 |
| Outside Vertical Trailering Mirrors | +$720 |
| Black Front and Rear Molded Splash Guards | +$190 |
| Pickup Bed Delete | +-$1,155 |
| Cargo Tie-Down Rings | +$105 |
| Electric Rear-Window Defogger | +$225 |
| Dimensions | |
|---|---|
| Bed Length | 98.3 in. |
| Curb weight | 7,064 lbs. |
| Gross weight | 11,500 lbs. |
| Ground clearance | 11.2 in. |
| Height | 80.9 in. |
| Length | 266.1 in. |
| Maximum payload | 4,398 lbs. |
| Maximum towing capacity | 20,000 lbs. |
| Overall Width without Mirrors | 81.9 in. |
| Wheel base | 172.0 in. |
| Colors | |
|---|---|
| Exterior Colors |
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| Interior Colors |
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| Tires & Wheels | |
|---|---|
| fullsize matching spare tire | yes |
| painted steel wheels | yes |
| underbody mounted spare tire | yes |
| 18 in. wheels | yes |
| All terrain tires | yes |
| LT275/70R18 tires | yes |
| Suspension | |
|---|---|
| front independent suspension | yes |
| Stabilizer bar stabilizer bar | yes |
| Warranty | |
|---|---|
| Basic | 3 yr./ 36,000 mi. |
| Drivetrain | 5 yr./ 60,000 mi. |
| Free Maintenance | 1 yr./ unlimited mi. |
| Roadside | 5 yr./ 60,000 mi. |
| Rust | 6 yr./ 100,000 mi. |