2025 GMC Sierra 3500HD dimensions: length, width, height, weight, cargo

Length

266.1in long

22 ft 2.1 in. 6.76 m.
81.9 in wide, 80.7 in tall.
Pro Regular Cab LB RWD.
Truck.

To scale. Dashed: median of 21 trucks (2025).

Dimensions by trim

2025 GMC Sierra 3500HD: outside dimensions by trim
Trim	Length	Width	With mirrors	Height	Wheelbase	Ground clearance	Turning circle
Pro Regular Cab LB RWD, Pro Regular Cab LB DRW RWD, Pro Double Cab LB RWD, Pro Regular Cab LB 4WD, Pro Double Cab LB DRW RWD, SLE Regular Cab LB RWD, Pro Regular Cab LB DRW 4WD, Pro Double Cab LB 4WD, Pro Crew Cab LB DRW RWD, SLE Regular Cab LB DRW RWD, Pro Double Cab LB DRW 4WD, SLE Double Cab LB RWD, SLE Regular Cab LB 4WD, SLE Double Cab LB DRW RWD, Pro Crew Cab LB DRW 4WD, SLE Regular Cab 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 4WD, Denali Ultimate Crew Cab LB DRW 4WD	266.1 in	81.9 in	81.8 in	80.7 in	172.0 in	N/A	57.0 ft
2WD Reg Cab 142" Pro, 4WD Reg Cab 142" Pro, 2WD Reg Cab 142" SLE, 4WD Reg Cab 142" SLE	235.4 in to 266.1 in	81.8 in	81.8 in	80.9 in	141.6 in	11.2 in	46.9 ft
2WD Double Cab 162" Pro, 4WD Double Cab 162" Pro, 2WD Double Cab 162" SLE, 4WD Double Cab 162" SLE	235.4 in to 266.1 in	81.8 in	81.8 in	80.9 in	162.5 in	11.2 in	53.9 ft
Pro Crew Cab RWD, Pro 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 4WD, Denali Ultimate Crew Cab 4WD	235.4 in to 266.1 in	81.8 in	81.8 in	80.9 in	158.9 in	11.2 in	52.7 ft
Pro Crew Cab LB RWD, Pro 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 4WD, Denali Ultimate Crew Cab LB 4WD	235.4 in to 266.8 in	81.8 in	81.8 in	80.7 in	172.0 in	11.1 in	57.0 ft

2025 GMC Sierra 3500HD: weight by trim
Trim	Curb weight	GVWR	Payload
Pro Regular Cab LB RWD, Pro Regular Cab LB DRW RWD, Pro Double Cab LB RWD, Pro Regular Cab LB 4WD, Pro Double Cab LB DRW RWD, SLE Regular Cab LB RWD, Pro Regular Cab LB DRW 4WD, Pro Double Cab LB 4WD, Pro Crew Cab LB DRW RWD, SLE Regular Cab LB DRW RWD, Pro Double Cab LB DRW 4WD, SLE Double Cab LB RWD, SLE Regular Cab LB 4WD, SLE Double Cab LB DRW RWD, Pro Crew Cab LB DRW 4WD, SLE Regular Cab 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 4WD, Denali Ultimate Crew Cab LB DRW 4WD	N/A	N/A	N/A
2WD Reg Cab 142" Pro, 2WD Reg Cab 142" SLE	6,229 lb to 6,887 lb	10,950 lb	4,721 lb
2WD Double Cab 162" Pro, 2WD Double Cab 162" SLE	6,688 lb	11,300 lb	4,612 lb
4WD Reg Cab 142" Pro, 4WD Reg Cab 142" SLE	6,604 lb	11,300 lb	4,696 lb
Pro Crew Cab RWD, SLE Crew Cab RWD, SLT Crew Cab RWD	6,338 lb to 6,887 lb	11,000 lb	4,342 lb
Pro Crew Cab LB RWD, SLE Crew Cab LB RWD, SLT Crew Cab LB RWD	6,800 lb	11,350 lb	4,550 lb
4WD Double Cab 162" Pro, 4WD Double Cab 162" SLE	6,995 lb	11,400 lb	4,405 lb
Pro Crew Cab 4WD, SLE Crew Cab 4WD, SLT Crew Cab 4WD, AT4 Crew Cab 4WD, Denali Crew Cab 4WD	6,979 lb	11,550 lb	4,571 lb
Pro Crew Cab LB 4WD, SLE Crew Cab LB 4WD, SLT Crew Cab LB 4WD, AT4 Crew Cab LB 4WD, Denali Crew Cab LB 4WD	7,079 lb	11,500 lb	4,421 lb
Denali Ultimate Crew Cab 4WD	6,979 lb	12,100 lb	5,121 lb
Denali Ultimate Crew Cab LB 4WD	7,079 lb	12,250 lb	5,171 lb

2025 GMC Sierra 3500HD: cargo and room by trim
Trim	Front legroom	Rear legroom	Front headroom	Rear headroom
Pro Regular Cab LB RWD, Pro Regular Cab LB DRW RWD, Pro Double Cab LB RWD, Pro Regular Cab LB 4WD, Pro Double Cab LB DRW RWD, SLE Regular Cab LB RWD, Pro Regular Cab LB DRW 4WD, Pro Double Cab LB 4WD, Pro Crew Cab LB DRW RWD, SLE Regular Cab LB DRW RWD, Pro Double Cab LB DRW 4WD, SLE Double Cab LB RWD, SLE Regular Cab LB 4WD, SLE Double Cab LB DRW RWD, Pro Crew Cab LB DRW 4WD, SLE Regular Cab 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 4WD, Denali Ultimate Crew Cab LB DRW 4WD	44.5 in	43.4 in	43.0 in	40.1 in
2WD Reg Cab 142" Pro, 4WD Reg Cab 142" Pro, 2WD Reg Cab 142" SLE, 4WD Reg Cab 142" SLE	44.5 in	43.4 in	43.1 in	40.1 in
2WD Double Cab 162" Pro, 4WD Double Cab 162" Pro, 2WD Double Cab 162" SLE, 4WD Double Cab 162" SLE	44.5 in	35.2 in	43.0 in	39.9 in
Pro Crew Cab RWD, Pro Crew Cab LB RWD, Pro Crew Cab 4WD, Pro 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 4WD, Denali Ultimate Crew Cab 4WD, Denali Ultimate Crew Cab LB 4WD	44.5 in	43.4 in	43.0 in	40.1 in

Weight

Pro Regular Cab LB RWD: curb weight not listed.

Garage fit

2025 GMC Sierra 3500HD 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

2025 GMC Sierra 3500HD through a garage door
Door	Fits	Spare width	Above roof
8 ft wide, 7 ft tall	Yes	14.1 in	3.3 in
9 ft wide, 7 ft tall	Yes	26.1 in	3.3 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

Truck.

Longest of 21 trucks (2025).

Median of 21 trucks (2025): 216.8 in long.

Bigger and smaller rivals

2025 GMC Sierra 3500HD and rivals by length
Model	Length	vs Sierra 3500HD
GMC Sierra 3500HD	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
RAM 1500	232.9 in	-33.2 in

Legroom and headroom

Pro Regular Cab LB RWD.

Front legroom: 44.5 inMore than 80% of 21 trucks (2025).
Rear legroom: 43.4 inMore than 70% of 21 trucks (2025).
Front headroom: 43.0 inMore than 85% of 21 trucks (2025).
Rear headroom: 40.1 inMore than 80% of 21 trucks (2025).

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