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2021 GMC Sierra 3500HD dimensions: length, width, height, weight, cargo

Length

266.1in long

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266.1 in long172.0 in wheelbase80.7 intall81.9 inwide
To scale. Dashed: median of 12 trucks (2021).

Dimensions by trim

2021 GMC Sierra 3500HD: outside dimensions by trim
TrimLengthWidthWith mirrorsHeightWheelbaseGround clearanceTurning circle
LB RWD, LB DRW RWD, Double Cab LB 4WD, Double Cab LB RWD, Double Cab LB DRW RWD, LB DRW 4WD, SLE LB RWD, Crew Cab LB DRW RWD, SLE LB DRW RWD, Double Cab LB DRW 4WD, SLE Double Cab LB RWD, SLE LB 4WD, Crew Cab LB DRW 4WD, SLE Double Cab LB DRW RWD, SLE LB DRW 4WD, SLE Double Cab LB 4WD, SLE Crew Cab LB DRW RWD, SLE Double Cab LB DRW 4WD, SLE Crew Cab LB DRW 4WD, SLT Crew Cab LB DRW RWD, SLT Crew Cab LB DRW 4WD, Denali Crew Cab LB DRW 4WD266.1 in81.9 in81.8 in80.7 in172.0 inN/A57.0 ft
2WD Reg Cab 142", 4WD Reg Cab 142", 2WD Reg Cab 142" SLE, 4WD Reg Cab 142" SLE235.5 in81.8 in81.8 in80.9 in141.6 in11.2 in46.9 ft
2WD Double Cab 162", 4WD Double Cab 162", 2WD Double Cab 162" SLE, 4WD Double Cab 162" SLE256.5 in81.8 in81.8 in80.9 in162.5 in11.2 in53.9 ft
Crew Cab RWD, Crew Cab 4WD, SLE Crew Cab RWD, SLE Crew Cab 4WD, SLT Crew Cab RWD, SLT Crew Cab 4WD, AT4 Crew Cab 4WD, Denali Crew Cab 4WD250.1 in81.8 in81.8 in80.9 in158.9 in11.2 in52.7 ft
Crew Cab LB RWD, Crew Cab LB 4WD, SLE Crew Cab LB RWD, SLE Crew Cab LB 4WD, SLT Crew Cab LB RWD, SLT Crew Cab LB 4WD, AT4 Crew Cab LB 4WD, Denali Crew Cab LB 4WD266.1 in81.8 in81.8 in80.7 in172.0 in11.1 in57.0 ft
2021 GMC Sierra 3500HD: weight by trim
TrimCurb weightGVWRPayload
LB RWD, LB DRW RWD, Double Cab LB 4WD, Double Cab LB RWD, Double Cab LB DRW RWD, LB DRW 4WD, SLE LB RWD, Crew Cab LB DRW RWD, SLE LB DRW RWD, Double Cab LB DRW 4WD, SLE Double Cab LB RWD, SLE LB 4WD, Crew Cab LB DRW 4WD, SLE Double Cab LB DRW RWD, SLE LB DRW 4WD, SLE Double Cab LB 4WD, SLE Crew Cab LB DRW RWD, SLE Double Cab LB DRW 4WD, SLE Crew Cab LB DRW 4WD, SLT Crew Cab LB DRW RWD, SLT Crew Cab LB DRW 4WD, Denali Crew Cab LB DRW 4WDN/AN/AN/A
2WD Reg Cab 142", 2WD Reg Cab 142" SLE6,339 lb10,750 lb4,411 lb
2WD Double Cab 162", 2WD Double Cab 162" SLE6,796 lb11,100 lb4,304 lb
4WD Reg Cab 142", 4WD Reg Cab 142" SLE6,636 lb11,100 lb4,464 lb
Crew Cab RWD, SLE Crew Cab RWD, SLT Crew Cab RWD6,466 lb11,000 lb4,534 lb
Crew Cab LB RWD, SLE Crew Cab LB RWD, SLT Crew Cab LB RWD6,887 lb11,150 lb4,263 lb
4WD Double Cab 162", 4WD Double Cab 162" SLE7,079 lb11,400 lb4,321 lb
Crew Cab 4WD, SLE Crew Cab 4WD, SLT Crew Cab 4WD, AT4 Crew Cab 4WD, Denali Crew Cab 4WD6,766 lb11,350 lb4,584 lb
Crew Cab LB 4WD, SLE Crew Cab LB 4WD, SLT Crew Cab LB 4WD, AT4 Crew Cab LB 4WD, Denali Crew Cab LB 4WD7,172 lb11,500 lb4,328 lb
2021 GMC Sierra 3500HD: cargo and room by trim
TrimFront legroomRear legroomFront headroomRear headroom
LB RWD, LB DRW RWD, Double Cab LB 4WD, Double Cab LB RWD, Double Cab LB DRW RWD, LB DRW 4WD, SLE LB RWD, Crew Cab LB DRW RWD, SLE LB DRW RWD, Double Cab LB DRW 4WD, SLE Double Cab LB RWD, SLE LB 4WD, Crew Cab LB DRW 4WD, SLE Double Cab LB DRW RWD, SLE LB DRW 4WD, SLE Double Cab LB 4WD, SLE Crew Cab LB DRW RWD, SLE Double Cab LB DRW 4WD, SLE Crew Cab LB DRW 4WD, SLT Crew Cab LB DRW RWD, SLT Crew Cab LB DRW 4WD, Denali Crew Cab LB DRW 4WD44.5 in43.4 in43.0 in40.1 in
2WD Reg Cab 142", 4WD Reg Cab 142", 2WD Reg Cab 142" SLE, 4WD Reg Cab 142" SLE44.5 in43.4 in43.1 in40.1 in
2WD Double Cab 162", 4WD Double Cab 162", 2WD Double Cab 162" SLE, 4WD Double Cab 162" SLE44.5 in35.2 in43.0 in39.9 in
Crew Cab RWD, Crew Cab LB RWD, Crew Cab 4WD, Crew Cab LB 4WD, SLE Crew Cab RWD, SLE Crew Cab LB RWD, SLE Crew Cab 4WD, SLE Crew Cab LB 4WD, SLT Crew Cab RWD, SLT Crew Cab LB RWD, SLT Crew Cab 4WD, SLT Crew Cab LB 4WD, AT4 Crew Cab 4WD, AT4 Crew Cab LB 4WD, Denali Crew Cab 4WD, Denali Crew Cab LB 4WD44.5 in43.4 in43.0 in40.1 in

Weight

LB RWD: curb weight not listed.

Garage fit

2021 GMC Sierra 3500HD in standard garages, centred
GarageFitsSpare lengthEach side
Single, 12 x 22 ftNo-2.1 in31.0 in
Single, 14 x 24 ftYes21.9 in43.0 in
Double, 20 x 20 ftNo-26.1 in79.0 in
Double, 24 x 24 ftYes21.9 in103.0 in
2021 GMC Sierra 3500HD through a garage door
DoorFitsSpare widthAbove roof
8 ft wide, 7 ft tallYes14.1 in3.3 in
9 ft wide, 7 ft tallYes26.1 in3.3 in

Your garage

Second car

Garage 12 x 22 ft. Door 9 x 7 ft.

  • No. Too long by 2.1 in.
  • Door: 26.1 in spare width. 3.3 in above the roof.

Size class

Full-size truck.

Longest of 12 trucks (2021).

Median of 12 trucks (2021): 215.3 in long.

Bigger and smaller rivals

2021 GMC Sierra 3500HD and rivals by length
ModelLengthvs Sierra 3500HD
GMC Sierra 3500HD266.1 in-
RAM 1500232.9 in-33.2 in
Ford F-150231.7 in-34.4 in
GMC Sierra 1500229.6 in-36.5 in
Chevrolet Silverado 1500229.5 in-36.6 in

Legroom and headroom

LB RWD.

Front legroom
44.5 inMore than 75% of 13 trucks (2021).
Rear legroom
43.4 inMore than 75% of 13 trucks (2021).
Front headroom
43.0 inMore than 92% of 13 trucks (2021).
Rear headroom
40.1 inMore than 75% of 13 trucks (2021).

Tall drivers: front legroom and headroom in the top 25% of trucks.

What this cannot tell you

Outline is a body-style template scaled to these numbers.

Garage fit ignores shelves, steps and open doors.

How values are checked