Measurements
GMC Sierra 1500 truck bed dimensions.
| Length | Width | Height | Volume | |
|---|---|---|---|---|
| Bed (tailgate up) | 69"175 cm | 51"130 cm | 22"56 cm | 63 cu ft1784 L |
| Bed (tailgate down) | 69"175 cm | 51"130 cm | 22"56 cm | 63 cu ft1784 L |
| Tailgate opening | – | 51"130 cm | 22"56 cm | – |
Figures are typical for the current generation and vary slightly by trim and model year. The tailgate opening is the limiting dimension for wide or tall items, so measure it before the volume.
What fits
What fits in the GMC Sierra 1500 bed?
Measure smart
What to measure.
Four numbers decide nearly every fit check. Get these right and the rest follows.
- 01The bed length from the bulkhead to the closed tailgate, then again with the tailgate down for long loads.
- 02The width between the wheel wells, which is tighter than the width measured at the bed rails.
- 03The tailgate opening width and height, the real limit for tall or boxed loads.
- 04Your item at its widest point, including handles, rails, and packaging.
Don't make these
Common mistakes.
Most “it didn't fit” stories trace back to one of these oversights.
- ⚠Measuring the width at the bed rails instead of between the wheel wells, where a sheet of plywood actually rests.
- ⚠Assuming the tailgate-up length when the load only fits with the tailgate down.
- ⚠Forgetting that a tonneau cover or bed cap cuts the usable height.
- ⚠Trusting the brochure bed length instead of your own cab and bed configuration.
Frequently asked
Questions we keep getting.
What are the GMC Sierra 1500 truck bed dimensions?
The GMC Sierra 1500 bed is about 69 inches (175 cm) long and 51 inches (130 cm) wide between the wheel wells, roughly 63 cubic feet. Dropping the tailgate adds usable length for long loads.
01What are the GMC Sierra 1500 tailgate opening dimensions?
The GMC Sierra 1500 tailgate opening is about 51 inches wide and 22 inches tall (130 x 56 cm). Width between the wheel wells is the usual limit for wide loads like a sheet of plywood.
02Will a 4x8 sheet of plywood fit in the GMC Sierra 1500 bed?
A 4x8 sheet is 48 inches wide. With a bed about 51 inches between the wheel wells, it lays flat between the wells; lower the tailgate for the full 96 inch length.
03Does the GMC Sierra 1500 bed size change by configuration?
Pickups offer multiple bed lengths, commonly 5.5, 6.5, and 8 feet, depending on the cab choice. The figures here reflect a common configuration; check your trim's bed length for an exact number.
04
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