2021 GMC Sierra Specifications

These are standard specifications for the 2021 GMC Sierra, not necessarily specifications for the vehicle(s) in the photo(s).

Features

Engine Location :	Front
Drive Type :	Rear Wheel (standard), 4WD
Production Years for Series :	2014 -
Weight :	6800 lbs \| 3084.428 kg
MPG City :	16
MPG Highway :	21

Engine & Transmission

Transmission:
6 Automatic 6L80

Dimension(s)

Regular Cab

Exterior
Towing Capacity :	9,800.0 lbs
Standard Payload :	1,980.0 lbs
Fuel Capacity :	22.0 Gal
Doors :	2
Length :	229.6 in \| 5832 mm.
Width :	81.2 in \| 2063 mm.
Height :	75.6 in \| 1920 mm.
Wheelbase :	139.5 in \| 3543 mm.
Interior
Front Headroom :	42.4 in \| 1077 mm.
Front Legroom :	45.3 in \| 1151 mm.
Front Hip Room :	60.7 in \| 1542 mm.
Front Shoulder Room :	66.0 in \| 1676 mm.

Double Cab

Exterior
MPG City :	16
MPG Highway :	21
Towing Capacity :	9,800.0 lbs
Standard Payload :	1,980.0 lbs
Fuel Capacity :	22.0 Gal
Doors :	2
Length :	231.7 in \| 5885 mm.
Width :	81.2 in \| 2063 mm.
Height :	75.6 in \| 1920 mm.
Wheelbase :	147.4 in \| 3744 mm.
Interior
Front Headroom :	42.4 in \| 1077 mm.
Front Legroom :	45.3 in \| 1151 mm.
Front Hip Room :	60.7 in \| 1542 mm.
Front Shoulder Room :	66.0 in \| 1676 mm.

Crew Cab

Exterior
MPG City :	16
MPG Highway :	21
Towing Capacity :	9,800.0 lbs
Standard Payload :	1,980.0 lbs
Fuel Capacity :	22.0 Gal
Seating Capacity :	5
Doors :	4
Length :	231.7 in \| 5885 mm.
Width :	81.2 in \| 2063 mm.
Height :	75.5 in \| 1918 mm.
Wheelbase :	147.4 in \| 3744 mm.
Interior
Front Headroom :	42.4 in \| 1077 mm.
Front Legroom :	45.3 in \| 1151 mm.
Front Hip Room :	60.7 in \| 1542 mm.
Front Shoulder Room :	66.0 in \| 1676 mm.

Handling

Suspension
Front : Independent coil-over-shock with twin-tube shock absorbers. Monotube shocks with Z71 pkg. Rear : Solid axle with semi-elliptic, variable-rate, two-stage multileaf springs, splayed twin-tube shock absorbers. Monotube shocks with Z71 pkg.

Steering
Rack and Pinion

Brakes
Front Brake Size :	13.0 in \| 330 mm.
Rear Brake Size :	13.6 in \| 345 mm.

Tires / Wheels
Tires :	255/70R17 all-season
Wheels :	17-in. steel

2021 GMC Sierra FAQs (show)

Popular frequently asked questions include:

What are the dimension and mechanical specifications of the 2021 GMC Sierra?
How many 2021 GMC Sierra were produced?
How powerful was the 2021 GMC Sierra? Was the 2021 GMC Sierra popular? Was the 2021 GMC Sierra expensive? What was the fuel economy of the 2021 GMC Sierra?

Q: What is the wheelbase size of the 2021 GMC Sierra? A: The 2021 GMC Sierra has wheelbase sizes of 139.50 and 147.40 inches.

Q: What is the length of the 2021 GMC Sierra? A: The 2021 GMC Sierra has lengths of 229.60 and 231.70 inches.

Q: What is the width of the 2021 GMC Sierra? A: The 2021 GMC Sierra has a width of 81.20 inches.

Q: How much headroom does the 2021 GMC Sierra have?A: The 2021 GMC Sierra has 42.40 inches of headroom.

Q: How much legroom does the 2021 GMC Sierra have?A: The 2021 GMC Sierra has legroom of 45.30 inches.

Q: What is the 2021 GMC Sierra's towing capacity?A: The 2021 GMC Sierra has a towing capaicty of 9800.00 lbs.

Q: What were the bodystyles of the 2021 GMC Sierra? A: The 2021 GMC Sierra was offered as a Crew Cab, Double Cab, Regular Cab.

Q: What tires did the 2021 GMC Sierra have? A: The 2021 GMC Sierra had 255/70R17 all-season tires.

Q: What type of wheels did the 2021 GMC Sierra have? A: The 2021 GMC Sierra had 17-in. steel wheels.

Q: What transmission did the 2021 GMC Sierra have? A: The 2021 GMC Sierra had a 6 speed Automatic 6L80 gearbox.

GMC Monthly Sales Volume

March 2023

130,608

Additional Sales Volume Data