GMC Cargo Space by Model

Measured cargo space across 1 GMC models — 30 cu ft of trunk space on average, up to 30 cu ft in the roomiest. Below, every model from the roomiest down, with what genuinely fits inside each.

EPA interior volume · 1 models · 1 trunk measurements · Updated Nov 3, 2026

Quick answer

GMC models average 30 cu ft of trunk space — roughly 5 checked suitcases. The roomiest holds 30 cu ft, the tightest 30, across 1 measurements.

What actually fits

A translation from cubic feet into luggage, on GMC's own models, so the numbers below mean something.

FIG.01·GMC — what fits in each trunk
Model	Trunk volume	Checked cases	Carry-ons	Stroller	Measured
GMC Terrain	30 cu ft	5	15	yes	2027

ROWS 1·SOURCE EPA interior volume + ForCar

Across GMC the trunk averages 30 cu ft, against 15.4 cu ft for every car we measure.

GMC models by cargo space

From the roomiest down — 1 models with a measured trunk.

FIG.01·GMC models by cargo space
Model	Cargo	Checked suitcases	Cabin
GMC Terrain	30 cu ft	5	104 cu ft

ROWS 1·SOURCE EPA interior volume + ForCar

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How we count

Cargo and passenger volumes come from EPA interior-volume records — the same figures manufacturers file for the window sticker, measured to a standard method rather than claimed in a brochure.

The luggage counts are ours — computed for all 1 GMC models below. We assume 80% usable volume, because a trunk is not a cube: wheel arches, a sloping tailgate and the shape of the cases themselves waste the rest, so the 30 cu ft GMC averages becomes 24 cu ft you can actually pack. Suitcase sizes are the airline standards — 22 × 14 × 9″ for carry-on, 27 × 21 × 14″ for checked, and the roomiest GMC here swallows 5 checked cases. Numbers are deliberately conservative; if we say four cases fit, four cases fit.

Everything on GMC

Recalls1,414 campaigns Fuel economy53 mpg best ReliabilityEvery model ranked Common problems39,396 complaints Check a VINBy production run DimensionsSize and weight What yours is worthValuation by model Insurance costPer model, per state Window stickersOriginal Monroney labels Decode a VINWhat each character means About the brand25 models tracked

Frequently asked questions

Which GMC has the most cargo space?

The roomiest holds 30 cu ft. The table above sorts every GMC model from the largest trunk down.

What is the average GMC cargo space?

30 cu ft across 1 models — about 5 checked suitcases.

Where do these figures come from?

EPA interior-volume records — standardised measurements filed by manufacturers, not marketing claims.

Cargo and passenger volumes from EPA interior-volume records, 1 measurements across 1 GMC models, seats up. Luggage capacity computed by ForCar at 80% usable volume against airline-standard case sizes. Last updated Nov 2026. — ForCar Reviewed by Denis Kataev, founder of ForCar.

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