GMC models average 205.9″ long and 4,661 lb. The largest on record is 244.1″, the smallest 173.6″ — a spread of 70.5″ within one badge.
GMC size profile
| Measure | Average across 15 models |
|---|---|
| Length | 205.9″ (17′ 2″) |
| Width | 76.8″ |
| Height | 73.2″ |
| Curb weight | 4,661 lb |
| Longest model on record | 244.1″ |
| Shortest model on record | 173.6″ |
GMC models by size
From the largest down, with the number of generations we have measured for each.
| Model | Length | Width | Curb weight | Generations |
|---|---|---|---|---|
| GMC Sierra | 79.5″ | 5,505 lb | 8 | |
| GMC Yukon XL | 79.9″ | 5,734 lb | 4 | |
| GMC Suburban | 78.3″ | 4,837 lb | 2 | |
| GMC Canyon | 72.4″ | 4,292 lb | 3 | |
| GMC Vandura | 79.5″ | 4,969 lb | 2 | |
| GMC Envoy | 74.8″ | 4,694 lb | 4 | |
| GMC Sonoma | 66.9″ | 3,236 lb | 3 | |
| GMC Acadia | 78″ | 4,469 lb | 3 | |
| GMC Yukon | 78.7″ | 5,284 lb | 6 | |
| GMC Hummer EV SUV | 86.6″ | — | 1 | |
| GMC Safari | 77.6″ | 3,843 lb | 4 | |
| GMC Terrain | 73.2″ | 3,622 lb | 3 | |
| GMC Jimmy | 66.9″ | 3,765 lb | 3 |
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How we measure
Dimensions come from NHTSA vPIC and Transport Canada vehicle records — manufacturer-declared figures, held in metric and converted to inches and pounds for display, 51 such records for GMC alone, model years 1985 to 2025.
One row per generation, not per model year: manufacturers rarely change the body between facelifts, and for GMC that means 46 generation rows instead of 51 year-by-year ones. Where a generation offered several body styles, the figures are the base measurements for that generation, which is how the 13 GMC entries below are built.
Frequently asked questions
How big is an average GMC?
205.9″ long and 4,661 lb, averaged across 15 models.
Which GMC model is the largest?
The Sierra at 227.6″ — the smallest is the Jimmy at 178.7″, a spread of 48.8″ inside one badge.
Where do the GMC figures come from?
NHTSA vPIC and Transport Canada records covering 51 GMC build entries between 1985 and 2025 — manufacturer-declared dimensions, converted from metric for display.
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