	Curb Weight	6971 lbs.
	Fuel Capacity	36.0 gallons
	Front Head Room	43.0 inches
	Front Leg Room	44.5 inches
	Max Seating Capacity	6
	Minimum Ground Clearance	11.2 inches
	Overall Length	256.5 inches
	Front Shoulder Room	66.0 inches
	Towing Capacity, Maximum	14500 lbs.
	Turning Diameter	53.9 feet
	Wheel Base	162.5 inches
	Truck Bed Volume	76 cu.ft.
	Bed Length	8.00 feet
	Gross Vehicle Weight Rating (GVWR)	12150 lbs.
	Payload Capacity	4391 lbs.

Exterior

	Alloy Wheels	Available
	Fog Lights	Available
	Number of Doors	4 doors
	Privacy Glass	Available
	LED Headlights	Available

Mechanical

	Drivetrain	4WD
	Transmission Type	Automatic
	6 speed	Available
	Recommended Fuel	Regular
	Hill Descent Control	Available
	Hill Start Assist	Available
	Parking Assist System	Available

Performance

	Horsepower	401 @ 5200 RPM
	Torque	464 @ 4000 rpm
	Engine	V8, 6.6 Liter

Warranty

	Basic	3 years / 36000 miles
	Powertrain	5 years / 60000 miles
	Corrosion	3 years / 36000 miles

2021 GMC Sierra 3500 HD Double Cab SLE Pickup 4D 8 ft Standard Features

12V Power Outlet
Alarm System
Bluetooth Streaming Audio
Bluetooth Wireless Technology
Climate Control Air Conditioning
Cloth Seats
Cruise Control
Folding Rear Seat
Hands Free Phone
Heated Seats
Heated Steering Wheel
Integrated Garage Door Opener
Internet Access
Leather-Wrapped Steering Wheel
Power Driver's Seat
Power Outlet
Power Windows
Premium Radio
Rear Window Defroster
Remote Engine Start
Remote Keyless Entry
Satellite Radio
Smartphone Interface
Steering Wheel Controls
Tilt Steering Wheel
Tilt/Telescoping Steering Wheel
Touch Screen Monitor
USB Port
Voice Recognition System

Next Steps to Buying Smart

2021 GMC Sierra 3500 HD Double Cab
KBB.com Review

4.2

Kbb.com Expert Rating

You'll Like This Car If...

Big, strong, and powerful. Maximum tow rating of 36,000 pounds. 6.6-liter diesel V8/Allison 10-speed transmission combination. ProGrade trailering system. AT4 off-road model.

You May Not Like This Car If...

Top models can get expensive. Not up to Ram levels of roominess.

2021 GMC Sierra 3500 HD Double Cab
KBB.com Consumer Reviews

4.2

Consumer Rating

6 ratings

Value

4.3

Performance

4.5

Quality

4.2

Comfort

4.3

Reliability

4.0

Styling

4.8

2021 GMC Sierra 3500 HD Double Cab SLE Pickup 4D 8 ft Safety

Safety Features & Technology

Child Door Locks
Child Seat Anchors
Driver Airbag
Passenger Airbag
Stability Control
Traction Control
Blind-Spot Alert
Collision Warning System
Collision Warning System with Auto Brake
Front Head Curtain Airbag
Front Side Airbag
Lane Departure Warning System
Parental Control System
Rear Head Curtain Airbag
Rear View Camera

Compare to Similar Vehicles

	Used 2021 GMC Sierra 3500 HD Double Cab SLE Pickup 4D 8 ft	Used 2025 Ram 1500 Quad Cab	Used 2021 Chevrolet Silverado 1500	Used 2021 Ram 1500 Trucks
		See Details	See Details	See Details
Price	$33,500	$30,800	$30,700	$29,000
KBB.com Rating	4.2	4.5	4.3	4.5
Consumer Rating	4.2	4.3	3.8	4.3
Fuel Economy	N/A	City 20/Hwy 25/Comb 22 MPG	City 16/Hwy 22/Comb 18 MPG	City 15/Hwy 21/Comb 17 MPG
Fuel Type	Gas	Gas	N/A	N/A
Safety Rating	N/A	5.0	5.0	5.0
Seating Capacity	6	N/A	6	6
Basic Warranty	3 years or 36000 miles	3 years or 36000 miles	3 years or 36000 miles	3 years or 36000 miles
Horsepower	401 @ 5200 RPM	305 @ 6400 RPM	355 @ 5600 RPM	395 @ 5600 RPM
Engine	V8, 6.6 Liter	V6, VVT, eTorque, 3.6 Liter	V8, EcoTec3, DFM, 5.3 Liter	V8, HEMI, 5.7 Liter
Drivetrain	4WD	2WD	4WD	4WD