2026 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.
Pro Regular Cab LB RWD.
Full-size truck.

To scale. Dashed: median of 22 trucks (2026).

Dimensions by trim

2026 GMC Sierra 2500HD: outside dimensions by trim
Trim	Length	Width	With mirrors	Height	Wheelbase	Ground clearance	Turning circle
Pro Regular Cab LB RWD, Pro Regular Cab LB 4WD, Pro Crew Cab RWD, Pro Crew Cab LB RWD, Pro Crew Cab 4WD, Pro Crew Cab LB 4WD, SLE Regular Cab LB 4WD, SLE Crew Cab 4WD, SLE Crew Cab LB 4WD, 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, AT4X Crew Cab 4WD, Denali Ultimate Crew Cab 4WD, Denali Ultimate 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 Pro, 3500HD CC 4WD Reg Cab 146" WB, 60" CA Pro, 3500HD CC 2WD Reg Cab 146" WB, 60" CA SLE, 3500HD CC 4WD Reg Cab 146" WB, 60" CA SLE	235.4 in to 266.1 in	81.9 in to 89.2 in	81.8 in	80.1 in	141.7 in to 172.0 in	8.2 in	47.0 ft
3500HD CC 2WD Reg Cab 171" WB, 84.5" CA Pro, 3500HD CC 4WD Reg Cab 171" WB, 84.5" CA Pro, 3500HD CC 2WD Reg Cab 171" WB, 84.5" CA SLE, 3500HD CC 4WD Reg Cab 171" WB, 84.5" CA SLE	235.4 in to 266.1 in	81.9 in to 89.2 in	81.8 in	80.1 in	141.7 in to 172.0 in	8.2 in	54.0 ft
Pro Double Cab RWD, Pro Double Cab 4WD, SLE Double Cab 4WD	235.4 in to 266.1 in	81.8 in	81.8 in	80.0 in	149.4 in	10.2 in	49.5 ft
Pro Double Cab LB RWD, Pro Double Cab LB 4WD, SLE Double Cab LB 4WD	235.4 in to 266.1 in	81.8 in	81.8 in	79.8 in	162.5 in	10.1 in	53.9 ft
3500HD CC 2WD Crew Cab 177" WB, 60" CA Pro, 3500HD CC 4WD Crew Cab 177" WB, 60" CA Pro, 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	81.9 in to 89.2 in	81.8 in	80.1 in	141.7 in to 177.0 in	8.2 in	57.5 ft
4WD Crew Cab 159" Denali, 4WD Crew Cab 159" AT4, 2WD Crew Cab 159" Pro, 4WD Crew Cab 159" Pro, 4WD Crew Cab 159" SLE, 4WD Crew Cab 159" SLT	235.4 in to 266.1 in	81.8 in	81.8 in	79.8 in	158.9 in	10.1 in	52.7 ft
4WD Crew Cab 172" Denali, 4WD Crew Cab 172" AT4, 2WD Crew Cab 172" Pro, 4WD Crew Cab 172" Pro, 4WD Crew Cab 172" SLE, 4WD Crew Cab 172" SLT	235.4 in to 266.8 in	81.8 in	81.8 in	79.7 in	172.0 in	10.1 in	57.0 ft
4WD Crew Cab 159" Denali Ultimate	235.4 in to 266.1 in	81.8 in	81.8 in	79.8 in	158.9 in	10.3 in	52.7 ft
4WD Crew Cab 172" Denali Ultimate	235.4 in to 266.8 in	81.8 in	81.8 in	79.7 in	172.0 in	10.3 in	57.0 ft
4WD Crew Cab 159" AT4X	235.4 in to 266.1 in	81.8 in	81.8 in	79.9 in to 82.7 in	158.9 in	11.6 in	51.8 ft
2WD Reg Cab 142" Pro, 4WD Reg Cab 142" Pro, 4WD Reg Cab 142" SLE	235.4 in to 266.1 in	81.8 in	81.8 in	79.9 in	141.6 in	10.2 in	46.9 ft

2026 GMC Sierra 2500HD: weight by trim
Trim	Curb weight	GVWR	Payload
Pro Regular Cab LB RWD, Pro Regular Cab LB 4WD, Pro Crew Cab RWD, Pro Crew Cab LB RWD, Pro Crew Cab 4WD, Pro Crew Cab LB 4WD, SLE Regular Cab LB 4WD, SLE Crew Cab 4WD, SLE Crew Cab LB 4WD, 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, AT4X Crew Cab 4WD, Denali Ultimate Crew Cab 4WD, Denali Ultimate Crew Cab LB 4WD	N/A	N/A	N/A
3500HD CC 2WD Reg Cab 146" WB, 60" CA Pro, 3500HD CC 2WD Reg Cab 146" WB, 60" CA SLE	6,257 lb	14,000 lb	7,743 lb
3500HD CC 2WD Reg Cab 171" WB, 84.5" CA Pro, 3500HD CC 2WD Reg Cab 171" WB, 84.5" CA SLE	6,376 lb	14,000 lb	7,624 lb
Pro Double Cab RWD	6,391 lb	10,050 lb	3,659 lb
Pro Double Cab LB RWD	6,525 lb	10,200 lb	3,675 lb
3500HD CC 4WD Reg Cab 146" WB, 60" CA Pro, 3500HD CC 4WD Reg Cab 146" WB, 60" CA SLE	6,633 lb	14,000 lb	7,367 lb
3500HD CC 4WD Reg Cab 171" WB, 84.5" CA Pro, 3500HD CC 4WD Reg Cab 171" WB, 84.5" CA SLE	6,706 lb	14,000 lb	7,294 lb
Pro Double Cab 4WD, SLE Double Cab 4WD	6,738 lb	10,350 lb	3,612 lb
Pro Double Cab LB 4WD, SLE Double Cab LB 4WD	6,829 lb	10,500 lb	3,671 lb
3500HD CC 2WD Crew Cab 177" WB, 60" CA Pro, 3500HD CC 2WD Crew Cab 177" WB, 60" CA SLE	5,924 lb to 6,810 lb	14,000 lb	7,190 lb
3500HD CC 4WD Crew Cab 177" WB, 60" CA Pro, 3500HD CC 4WD Crew Cab 177" WB, 60" CA SLE	6,237 lb to 7,154 lb	14,000 lb	6,846 lb
4WD Crew Cab 159" Denali, 4WD Crew Cab 159" AT4, 4WD Crew Cab 159" SLT	6,825 lb	10,850 lb	4,025 lb
4WD Crew Cab 172" Denali, 4WD Crew Cab 172" AT4, 4WD Crew Cab 172" SLT	6,237 lb to 6,918 lb	11,050 lb	4,132 lb
4WD Crew Cab 159" Denali Ultimate	6,825 lb	11,350 lb	4,525 lb
4WD Crew Cab 172" Denali Ultimate	6,237 lb to 6,918 lb	11,550 lb	4,632 lb
4WD Crew Cab 159" AT4X	6,825 lb	11,025 lb	4,200 lb
2WD Crew Cab 159" Pro	6,510 lb	10,150 lb	3,640 lb
4WD Crew Cab 159" Pro, 4WD Crew Cab 159" SLE	6,825 lb	10,450 lb	3,625 lb
2WD Crew Cab 172" Pro	5,924 lb to 6,610 lb	10,300 lb	3,690 lb
4WD Crew Cab 172" Pro, 4WD Crew Cab 172" SLE	6,237 lb to 6,918 lb	10,650 lb	3,732 lb
2WD Reg Cab 142" Pro	5,924 lb to 6,442 lb	10,000 lb	3,926 lb
4WD Reg Cab 142" Pro, 4WD Reg Cab 142" SLE	6,237 lb to 6,731 lb	10,250 lb	3,828 lb

2026 GMC Sierra 2500HD: cargo and room by trim
Trim	Front legroom	Rear legroom	Front headroom	Rear headroom
Pro Regular Cab LB RWD, Pro Regular Cab LB 4WD, Pro Crew Cab RWD, Pro Crew Cab LB RWD, Pro Crew Cab 4WD, Pro Crew Cab LB 4WD, SLE Regular Cab LB 4WD, SLE Crew Cab 4WD, SLE Crew Cab LB 4WD, 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, AT4X Crew Cab 4WD, Denali Ultimate Crew Cab 4WD, Denali Ultimate Crew Cab LB 4WD	44.5 in	43.4 in	39.9 in	40.1 in
3500HD CC 2WD Reg Cab 146" WB, 60" CA Pro, 3500HD CC 4WD Reg Cab 146" WB, 60" CA Pro, 3500HD CC 2WD Reg Cab 146" WB, 60" CA SLE, 3500HD CC 4WD Reg Cab 146" WB, 60" CA SLE, 2WD Reg Cab 142" Pro, 4WD Reg Cab 142" Pro, 4WD Reg Cab 142" SLE	44.5 in	43.4 in	43.1 in	40.1 in
3500HD CC 2WD Reg Cab 171" WB, 84.5" CA Pro, 3500HD CC 4WD Reg Cab 171" WB, 84.5" CA Pro, 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
Pro Double Cab RWD, Pro Double Cab LB RWD, Pro Double Cab 4WD, Pro Double Cab LB 4WD, SLE Double Cab 4WD, SLE Double Cab LB 4WD	44.5 in	35.2 in	43.0 in	39.9 in
3500HD CC 2WD Crew Cab 177" WB, 60" CA Pro, 3500HD CC 4WD Crew Cab 177" WB, 60" CA Pro, 3500HD CC 2WD Crew Cab 177" WB, 60" CA SLE, 3500HD CC 4WD Crew Cab 177" WB, 60" CA SLE, 4WD Crew Cab 159" Denali, 4WD Crew Cab 172" Denali, 4WD Crew Cab 159" AT4, 4WD Crew Cab 172" AT4, 2WD Crew Cab 159" Pro, 4WD Crew Cab 159" Pro, 4WD Crew Cab 159" SLE, 4WD Crew Cab 159" SLT, 2WD Crew Cab 172" Pro, 4WD Crew Cab 172" Pro, 4WD Crew Cab 172" SLE, 4WD Crew Cab 172" SLT	44.5 in	43.4 in	43.0 in	40.1 in
4WD Crew Cab 159" Denali Ultimate, 4WD Crew Cab 172" Denali Ultimate, 4WD Crew Cab 159" AT4X	44.5 in	43.4 in	39.9 in	40.1 in

Weight

Pro Regular Cab LB RWD: curb weight not listed.

Garage fit

2026 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

2026 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 22 trucks (2026).

Median of 22 trucks (2026): 216.9 in long.

Bigger and smaller rivals

2026 GMC Sierra 2500HD and rivals by length
Model	Length	vs Sierra 2500HD
GMC Sierra 2500HD	266.1 in	-
Toyota Tundra	233.6 in	-32.5 in
GMC Sierra EV	233.4 in	-32.7 in
Chevrolet Silverado EV	233.1 in	-33.0 in
Ford F-150	232.6 in	-33.5 in

Legroom and headroom

Pro Regular Cab LB RWD.

Front legroom: 44.5 inMore than 80% of 21 trucks (2026).
Rear legroom: 43.4 inMore than 70% of 21 trucks (2026).
Front headroom: 39.9 inMore than 10% of 21 trucks (2026).
Rear headroom: 40.1 inMore than 80% of 21 trucks (2026).

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