GMC
GMC Sierra 1500 Bed Sizes & Dimensions
Inside bed length, width between the wheel wells and depth for the GMC Sierra 1500, 1999 to today — plus which camper shells and tonneau covers swap between years. The current truck comes with 5'10", 6'7" or 8'2" beds.
2019–present Sierra 1500 T1
Verified 2026| Bed | Cabs | Length at floor | Max width | Between wheel wells | Depth | Volume |
|---|---|---|---|---|---|---|
| Short Box 5'10" nominal |
Crew Cab | 69.9″ | 71.4″ | 50.6″ | 22.4″ | 62.9 ft³ |
| Standard Box 6'7" nominal |
Double Cab, Crew Cab | 79.4″ | 71.4″ | 50.6″ | 22.4″ | 71.7 ft³ |
| Long Box 8'2" nominal |
Regular Cab, Double Cab | 98.2″ | 71.4″ | 50.6″ | 22.4″ | 89.1 ft³ |
Camper shell & cover swaps
Same bed box as:
A shell from one of these trucks with the same bed length should sit on the rails, but cab height, back-window angle, tailgate type and rail caps can still stop it from fitting. Confirm with the shell maker before you buy.
Cab height above the bed rail
About 18.4″ (46.7 cm)
Range seen across trims and sources: 17.7″ (45.0 cm) – 19.6″ (49.8 cm)
How far the cab roof rises above the top of the bed sides. A cab-high shell is built to about this height. Worked out from the maker's published heights (overall height − bed floor height − bed depth), so treat it as ±1″. Source 1 · Source 2 · Measured yours?
- 2019 Silverado 1500 LD and 2019 Sierra 1500 Limited are carry-over 2014–2018 trucks — use the previous-generation table.
- Beds on 2019+ trucks are wider and taller than 2014–2018 beds, so older shells do not swap onto these trucks.
- Chevy Silverado and GMC Sierra 1500 share the same bed box; a Sierra shell fits a Silverado with the same bed length.
2014–2018 Sierra 1500 K2
Spot-check| Bed | Cabs | Length at floor | Max width | Between wheel wells | Depth | Volume |
|---|---|---|---|---|---|---|
| Short Box 5'8" nominal |
Crew Cab | 69.3″ | 62.3″ | 50.6″ | 22.4″ | 53.0 ft³ |
| Standard Box 6'6" nominal |
Regular Cab, Double Cab, Crew Cab | 78.9″ | 62.3″ | 50.6″ | 22.4″ | 61.0 ft³ |
| Long Box 8'0" nominal |
Regular Cab, Double Cab, Crew Cab | 97.8″ | 62.3″ | 50.6″ | 22.4″ | 75.5 ft³ |
Camper shell & cover swaps
Same bed box as:
- Chevrolet Silverado 1500 2014–2018
- Chevrolet Silverado 2500HD 2015–2019
- Chevrolet Silverado 3500HD 2015–2019
- GMC Sierra 2500HD 2015–2019
- GMC Sierra 3500HD 2015–2019
A shell from one of these trucks with the same bed length should sit on the rails, but cab height, back-window angle, tailgate type and rail caps can still stop it from fitting. Confirm with the shell maker before you buy.
Cab height above the bed rail
Estimated ≈ 18.5″ (47.0 cm) Estimate
Likely range 17″ (43.2 cm) – 20″ (50.8 cm). Based on the 2019+ Silverado/Sierra 1500, which has the same 22.4-in bed depth and a similar cab height.
This number is an estimate worked out from measurements of similar trucks, not from GMC's specifications. We can't guarantee it's correct, so measure your truck before buying a shell. Measured yours? Send it and we'll replace the estimate.
- 2014–2018 1500s and 2015–2019 2500HD/3500HD share this bed box — shells cross over between light-duty and HD trucks with the same bed length (check cab height).
- Our old site listed the Regular Cab short bed as 69.33 in; GM's Regular Cab was offered with the 6'6" (78.9 in) and 8' beds.
Older Sierra 1500 bed sizes (1999–2015)
From our original tables. Bed width is inside rail to inside rail; length is from the front bed wall at the floor to the end of the bed. Wheel wells take up space inside these numbers.
Sierra 1500 · 2014–2015 — 6 configurations
| Years | Cab (GMC term) | Universal cab | Bed (GMC term) | Universal bed | Length | Width at cab | Width at tailgate |
|---|---|---|---|---|---|---|---|
| 2014–2015 | Regular Cab | Regular | Standard | Short | 69.33″ | 62.33″ | 62.33″ |
| 2014–2015 | Regular Cab | Regular | Long | Long | 97.8″ | 62.33″ | 62.33″ |
| 2014–2015 | Double Cab | Extended | Standard | Short | 78.87″ | 62.33″ | 62.33″ |
| 2014–2015 | Crew Cab | Crew | Short | Extrashort | 69.33″ | 62.33″ | 62.33″ |
| 2014–2015 | Crew Cab | Crew | Standard | Short | 78.87″ | 62.33″ | 62.33″ |
| 2014–2015 | Crew Cab | Crew | Long | Long | 97.8″ | 62.33″ | 62.33″ |
Sierra 1500 · 2007–2013 — 8 configurations
| Years | Cab (GMC term) | Universal cab | Bed (GMC term) | Universal bed | Length | Width at cab | Width at tailgate |
|---|---|---|---|---|---|---|---|
| 2007–2013 | Regular Cab | Regular | Short | Short | 77.5″ | 63.63″ | 62″ |
| 2007–2013 | Regular Cab | Regular | Long | Long | 96.63″ | 63.63″ | 62″ |
| 2007–2013 | Extended Cab | Extended | Extrashort | Extrashort | 68″ | 63.63″ | 62″ |
| 2007–2013 | Extended Cab | Extended | Short | Short | 77.5″ | 63.63″ | 62″ |
| 2007–2013 | Extended Cab | Extended | Long | Long | 96.63″ | 63.63″ | 62″ |
| 2007–2013 | Crew Cab | Crew | Extrashort | Extrashort | 68″ | 63.63″ | 62″ |
| 2007–2013 | Crew Cab | Crew | Short | Short | 77.5″ | 63.63″ | 62″ |
| 2007–2013 | Crew Cab | Crew | Long | Long | 96.63″ | 63.63″ | 62″ |
Sierra 1500 · 2003–2006 — 7 configurations
| Years | Cab (GMC term) | Universal cab | Bed (GMC term) | Universal bed | Length | Width at cab | Width at tailgate |
|---|---|---|---|---|---|---|---|
| 2003–2006 | Regular Cab | Regular | Short | Short | 77.5″ | 63.69″ | 62″ |
| 2003–2006 | Regular Cab | Regular | Sportside | Sportside | 77.63″ | 49.06″ | 49.06″ |
| 2003–2006 | Regular Cab | Regular | Long | Long | 96.63″ | 63.69″ | 62″ |
| 2003–2006 | Extended Cab | Extended | Short | Short | 77.5″ | 63.69″ | 62″ |
| 2003–2006 | Extended Cab | Extended | Sportside | Sportside | 77.63″ | 49.06″ | 49.06″ |
| 2003–2006 | Extended Cab | Extended | Long | Long | 96.63″ | 63.69″ | 62″ |
| 2004–2006* | Crew Cab | Crew | Extrashort | Extrashort | 68.13″ | 63.19″ | 61.75″ |
Sierra 1500 HD · 2003–2003 — 6 configurations
| Years | Cab (GMC term) | Universal cab | Bed (GMC term) | Universal bed | Length | Width at cab | Width at tailgate |
|---|---|---|---|---|---|---|---|
| 2003–2003 | Regular Cab | Regular | Short | Short | 77.5″ | 63.69″ | 62″ |
| 2003–2003 | Regular Cab | Regular | Long | Long | 96.63″ | 63.69″ | 62″ |
| 2003–2003 | Extended Cab | Extended | Short | Short | 77.5″ | 63.69″ | 62″ |
| 2003–2003 | Extended Cab | Extended | Long | Long | 96.63″ | 63.69″ | 62″ |
| 2003–2003 | Crew Cab | Crew | Short | Short | 77.5″ | 63.69″ | 62″ |
| 2003–2003 | Crew Cab | Crew | Long | Long | 96.63″ | 63.69″ | 62″ |
Sierra 1500 HD · 2001–2002 — 6 configurations
| Years | Cab (GMC term) | Universal cab | Bed (GMC term) | Universal bed | Length | Width at cab | Width at tailgate |
|---|---|---|---|---|---|---|---|
| 2001–2002 | Regular Cab | Regular | Short | Short | 77.5″ | 63.69″ | 62″ |
| 2001–2002 | Regular Cab | Regular | Long | Long | 96.63″ | 63.69″ | 62″ |
| 2001–2002 | Extended Cab | Extended | Short | Short | 77.5″ | 63.69″ | 62″ |
| 2001–2002 | Extended Cab | Extended | Long | Long | 96.63″ | 63.69″ | 62″ |
| 2001–2002 | Crew Cab | Crew | Short | Short | 77.5″ | 63.69″ | 62″ |
| 2001–2002 | Crew Cab | Crew | Long | Long | 96.63″ | 63.69″ | 62″ |
Sierra 1500 · 1999–2002 — 6 configurations
| Years | Cab (GMC term) | Universal cab | Bed (GMC term) | Universal bed | Length | Width at cab | Width at tailgate |
|---|---|---|---|---|---|---|---|
| 1999–2002 | Regular Cab | Regular | Short | Short | 77.5″ | 63.69″ | 62″ |
| 1999–2002 | Regular Cab | Regular | Sportside | Sportside | 77.63″ | 49.06″ | 49.06″ |
| 1999–2002 | Regular Cab | Regular | Long | Long | 96.63″ | 63.69″ | 62″ |
| 1999–2002 | Extended Cab | Extended | Short | Short | 77.5″ | 63.69″ | 62″ |
| 1999–2002 | Extended Cab | Extended | Sportside | Sportside | 77.63″ | 49.06″ | 49.06″ |
| 1999–2002 | Extended Cab | Extended | Long | Long | 96.63″ | 63.69″ | 62″ |
Owner fit reports
Add yoursSwapped a shell, fit a tonneau, or measured your bed? Tell other owners what worked. Approved reports appear here.