GMC Sierra Specs

Every GMC Sierra generation, measured

One row per generation. Watch the weight column — that is where most of the change happens for the GMC Sierra, 1,870 lb of it since 1994, and it is the number that decides fuel use, tyre wear and how far the car takes to stop.

From 1994 to today the Sierra gained 17.3″ of length (8%) and 1,870 lb of weight (44%). A modern compact often outweighs the mid-size car of a generation before.

Sierra year by year

Measured every model year, not just at generation changes — 33 years on record for the GMC Sierra. Small moves inside a generation are facelifts; the jumps are the 8 new platforms below.

Will a Sierra fit

The practical question behind every dimensions search, and for a 19.6-foot GMC Sierra it has a straight answer. A single-car garage in the US is typically 20 feet deep and a street parking space about 18, so the Sierra overshoots the garage by 0.6 ft. We allow a foot of clearance in both — nobody parks to the millimetre.

Against cars of the same length

Compared with 75 vehicles within ten inches of the same length — a fair proxy for «cars of this size», regardless of what the marketing calls them.

A longer wheelbase for the same overall length means shorter overhangs — usually more cabin space and a steadier ride. At 6,076 lb the GMC Sierra is 556 lb heavier than typical for its size, which generally shows up as fuel economy and stopping distance.

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, 33 measured model years for the GMC Sierra between 1994 and 2026.

One row per generation, not per model year: manufacturers rarely change the body between facelifts, and the GMC Sierra fits into 8 rows instead of 33. Where a generation offered several body styles, the figures are the base measurements for that generation of the GMC Sierra.