GMC Sierra 1500 2015 vs GMC Sierra 2500HD 2020 size comparison
GMC Sierra 2500HD 2020–2023 is 523 mm (9.0%) longer than GMC Sierra 1500 2015–2018. It is 47 mm (2.3%) wider, 143 mm (7.6%) taller and 392 mm (10.8%) longer in wheelbase. Boot space with the seats up is 1512 L and 1971 L (+459 L).
| Dimension | GMC Sierra 1500 2015–2018 | GMC Sierra 2500HD 2020–2023 | Difference |
|---|---|---|---|
| Length | 5829 mm | 6352 mm | +523 mm (+9.0%) |
| Width | 2032 mm | 2079 mm | +47 mm (+2.3%) |
| Height | 1884 mm | 2027 mm | +143 mm (+7.6%) |
| Wheelbase | 3645 mm | 4037 mm | +392 mm (+10.8%) |
| Boot | 1512 L | 1971 L | +459 L |
GMC Sierra 1500 2015–2018 dimensions · GMC Sierra 2500HD 2020–2023 dimensions