2021 GMC Sierra 2500HD dimensions: length, width, height, weight, cargo

Length

266.1in long

22 ft 2.1 in. 6.76 m.
81.9 in wide, 79.7 in tall.
LB RWD. Lengths: 235.5 in to 266.1 in.
Full-size truck.

To scale. Dashed: median of 12 trucks (2021).

Dimensions by trim

2021 GMC Sierra 2500HD: outside dimensions by trim
Trim	Length	Width	With mirrors	Height	Wheelbase	Ground clearance	Turning circle
2WD Reg Cab 142", 4WD Reg Cab 142", 2WD Reg Cab 142" SLE, 4WD Reg Cab 142" SLE	235.5 in	81.8 in	81.8 in	79.9 in	141.6 in	10.2 in	46.9 ft
LB RWD, LB 4WD, Base Crew Cab RWD, Base Crew Cab LB RWD, SLE LB RWD, Base Crew Cab 4WD, Base Crew Cab LB 4WD, SLE 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 4WD	266.1 in	81.9 in	81.8 in	79.7 in	172.0 in	N/A	57.0 ft
3500HD CC 2WD Reg Cab 146" WB, 60" CA, 3500HD CC 2WD Reg Cab 171" WB, 84.5" CA, 3500HD CC 4WD Reg Cab 146" WB, 60" CA, 3500HD CC 4WD Reg Cab 171" WB, 84.5" CA, 3500HD CC 2WD Reg Cab 146" WB, 60" CA SLE, 3500HD CC 2WD Reg Cab 171" WB, 84.5" CA SLE, 3500HD CC 4WD Reg Cab 146" WB, 60" CA SLE, 3500HD CC 4WD Reg Cab 171" WB, 84.5" CA SLE	235.4 in to 266.1 in	80.8 in to 81.9 in	81.8 in	80.1 in	141.7 in to 172.0 in	8.2 in	57.5 ft
Double Cab RWD, Double Cab 4WD, SLE Double Cab RWD, SLE Double Cab 4WD, SLT Double Cab RWD, SLT Double Cab 4WD	240.4 in	81.8 in	81.8 in	80.0 in	149.4 in	10.2 in	49.5 ft
Double Cab LB RWD, Double Cab LB 4WD, SLE Double Cab LB RWD, SLE Double Cab LB 4WD, SLT Double Cab RWD LB, SLT Double Cab LB 4WD	256.5 in	81.8 in	81.8 in	79.8 in	162.5 in	10.2 in	53.9 ft
2WD Crew Cab 159", 4WD Crew Cab 159", 2WD Crew Cab 159" SLE, 4WD Crew Cab 159" SLE, 2WD Crew Cab 159" SLT, 4WD Crew Cab 159" SLT, 4WD Crew Cab 159" AT4, 4WD Crew Cab 159" Denali	250.1 in	81.8 in	81.8 in	79.8 in	158.9 in	10.1 in	52.7 ft
2WD Crew Cab 172", 4WD Crew Cab 172", 2WD Crew Cab 172" SLE, 4WD Crew Cab 172" SLE, 2WD Crew Cab 172" SLT, 4WD Crew Cab 172" SLT, 4WD Crew Cab 172" AT4, 4WD Crew Cab 172" Denali	266.1 in	81.8 in	81.8 in	79.7 in	172.0 in	10.1 in	57.0 ft
3500HD CC 2WD Crew Cab 177" WB, 60" CA, 3500HD CC 4WD Crew Cab 177" WB, 60" CA, 3500HD CC 2WD Crew Cab 177" WB, 60" CA SLE, 3500HD CC 4WD Crew Cab 177" WB, 60" CA SLE	235.4 in to 270.3 in	80.8 in to 81.9 in	81.8 in	80.1 in	141.7 in to 176.8 in	8.2 in	57.5 ft

2021 GMC Sierra 2500HD: weight by trim
Trim	Curb weight	GVWR	Payload
2WD Reg Cab 142", 2WD Reg Cab 142" SLE	5,924 lb	9,900 lb	3,976 lb
LB RWD, LB 4WD, Base Crew Cab RWD, Base Crew Cab LB RWD, SLE LB RWD, Base Crew Cab 4WD, Base Crew Cab LB 4WD, SLE 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 4WD	N/A	N/A	N/A
3500HD CC 2WD Reg Cab 146" WB, 60" CA, 3500HD CC 2WD Reg Cab 146" WB, 60" CA SLE	5,924 lb to 6,442 lb	14,000 lb	7,948 lb
3500HD CC 2WD Reg Cab 171" WB, 84.5" CA, 3500HD CC 2WD Reg Cab 171" WB, 84.5" CA SLE	6,169 lb	14,000 lb	7,831 lb
Double Cab RWD, SLE Double Cab RWD	6,239 lb	10,050 lb	3,811 lb
Double Cab LB RWD, SLE Double Cab LB RWD	6,360 lb	10,200 lb	3,840 lb
4WD Reg Cab 142", 4WD Reg Cab 142" SLE	6,237 lb	10,250 lb	4,013 lb
3500HD CC 4WD Reg Cab 146" WB, 60" CA, 3500HD CC 4WD Reg Cab 146" WB, 60" CA SLE	6,237 lb to 6,731 lb	14,000 lb	7,580 lb
3500HD CC 4WD Reg Cab 171" WB, 84.5" CA, 3500HD CC 4WD Reg Cab 171" WB, 84.5" CA SLE	6,464 lb	14,000 lb	7,536 lb
2WD Crew Cab 159", 2WD Crew Cab 159" SLE	6,352 lb	10,150 lb	3,798 lb
2WD Crew Cab 172", 2WD Crew Cab 172" SLE	6,452 lb	10,300 lb	3,848 lb
3500HD CC 2WD Crew Cab 177" WB, 60" CA, 3500HD CC 2WD Crew Cab 177" WB, 60" CA SLE	5,924 lb to 6,584 lb	14,000 lb	7,416 lb
Double Cab 4WD, SLE Double Cab 4WD	6,555 lb	10,350 lb	3,795 lb
Double Cab LB 4WD, SLE Double Cab LB 4WD	6,649 lb	10,500 lb	3,851 lb
4WD Crew Cab 159", 4WD Crew Cab 159" SLE	6,642 lb	10,450 lb	3,808 lb
4WD Crew Cab 172", 4WD Crew Cab 172" SLE	6,741 lb	10,650 lb	3,909 lb
3500HD CC 4WD Crew Cab 177" WB, 60" CA, 3500HD CC 4WD Crew Cab 177" WB, 60" CA SLE	6,237 lb to 6,910 lb	14,000 lb	7,090 lb
SLT Double Cab RWD	6,239 lb	10,250 lb	4,011 lb
SLT Double Cab RWD LB	6,360 lb	10,400 lb	4,040 lb
2WD Crew Cab 159" SLT	6,352 lb	10,350 lb	3,998 lb
2WD Crew Cab 172" SLT	6,452 lb	10,500 lb	4,048 lb
SLT Double Cab 4WD	6,555 lb	10,550 lb	3,995 lb
SLT Double Cab LB 4WD	6,649 lb	10,750 lb	4,101 lb
4WD Crew Cab 159" SLT, 4WD Crew Cab 159" AT4, 4WD Crew Cab 159" Denali	6,642 lb	10,650 lb	4,008 lb
4WD Crew Cab 172" SLT, 4WD Crew Cab 172" AT4, 4WD Crew Cab 172" Denali	6,741 lb	10,850 lb	4,109 lb

2021 GMC Sierra 2500HD: cargo and room by trim
Trim	Front legroom	Rear legroom	Front headroom	Rear headroom
2WD Reg Cab 142", 3500HD CC 2WD Reg Cab 146" WB, 60" CA, 4WD Reg Cab 142", 3500HD CC 4WD Reg Cab 146" WB, 60" CA, 3500HD CC 2WD Reg Cab 146" WB, 60" CA SLE, 2WD Reg Cab 142" SLE, 3500HD CC 4WD Reg Cab 146" WB, 60" CA SLE, 4WD Reg Cab 142" SLE	44.5 in	43.4 in	43.1 in	40.1 in
LB RWD, LB 4WD, Base Crew Cab RWD, Base Crew Cab LB RWD, SLE LB RWD, Base Crew Cab 4WD, Base Crew Cab LB 4WD, SLE 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 4WD	44.5 in	43.4 in	43.0 in	40.1 in
3500HD CC 2WD Reg Cab 171" WB, 84.5" CA, 3500HD CC 4WD Reg Cab 171" WB, 84.5" CA, 3500HD CC 2WD Reg Cab 171" WB, 84.5" CA SLE, 3500HD CC 4WD Reg Cab 171" WB, 84.5" CA SLE	44.5 in	43.4 in	43.0 in	40.1 in
Double Cab RWD, Double Cab LB RWD, Double Cab 4WD, Double Cab LB 4WD, SLE Double Cab RWD, SLE Double Cab LB RWD, SLE Double Cab 4WD, SLE Double Cab LB 4WD, SLT Double Cab RWD, SLT Double Cab RWD LB, SLT Double Cab 4WD, SLT Double Cab LB 4WD	44.5 in	35.2 in	43.0 in	39.9 in
2WD Crew Cab 159", 2WD Crew Cab 172", 3500HD CC 2WD Crew Cab 177" WB, 60" CA, 4WD Crew Cab 159", 4WD Crew Cab 172", 3500HD CC 4WD Crew Cab 177" WB, 60" CA, 3500HD CC 2WD Crew Cab 177" WB, 60" CA SLE, 2WD Crew Cab 159" SLE, 2WD Crew Cab 172" SLE, 3500HD CC 4WD Crew Cab 177" WB, 60" CA SLE, 4WD Crew Cab 159" SLE, 4WD Crew Cab 172" SLE, 2WD Crew Cab 159" SLT, 2WD Crew Cab 172" SLT, 4WD Crew Cab 159" SLT, 4WD Crew Cab 172" SLT, 4WD Crew Cab 159" AT4, 4WD Crew Cab 172" AT4, 4WD Crew Cab 159" Denali, 4WD Crew Cab 172" Denali	44.5 in	43.4 in	43.0 in	40.1 in

Weight

LB RWD: curb weight not listed.

Garage fit

2021 GMC Sierra 2500HD in standard garages, centred
Garage	Fits	Spare length	Each side
Single, 12 x 22 ft	No	-2.1 in	31.0 in
Single, 14 x 24 ft	Yes	21.9 in	43.0 in
Double, 20 x 20 ft	No	-26.1 in	79.0 in
Double, 24 x 24 ft	Yes	21.9 in	103.0 in

2021 GMC Sierra 2500HD through a garage door
Door	Fits	Spare width	Above roof
8 ft wide, 7 ft tall	Yes	14.1 in	4.3 in
9 ft wide, 7 ft tall	Yes	26.1 in	4.3 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. 4.3 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 2500HD and rivals by length
Model	Length	vs Sierra 2500HD
GMC Sierra 2500HD	266.1 in	-
RAM 1500	232.9 in	-33.2 in
Ford F-150	231.7 in	-34.4 in
GMC Sierra 1500	229.6 in	-36.5 in
Chevrolet Silverado 1500	229.5 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.

2 or more sources
1 source
Model-level, rule or estimate
Sources disagree

How values are checked