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Pontiac Cargo Space by Model

Measured cargo space across 11 Pontiac models — 14.5 cu ft of trunk space on average, up to 20 cu ft in the roomiest. Below, every model from the roomiest down, with what genuinely fits inside each.

EPA interior volume · 11 models · 11 trunk measurements · Updated Nov 3, 2026
Quick answer

Pontiac models average 14.5 cu ft of trunk space — roughly 2 checked suitcases. The roomiest holds 20 cu ft, the tightest 7, across 11 measurements.

What actually fits

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

FIG.01·Pontiac — what fits in each trunk
ModelTrunk volumeChecked casesCarry-onsStrollerMeasured
Pontiac Vibe20 cu ft310yes2010
Pontiac Bonneville18 cu ft39yes2005
Pontiac G817 cu ft28yes2009
Pontiac Grand Prix16 cu ft28yes2008
Pontiac Grand Am15 cu ft27yes2005
Pontiac G514 cu ft27yes2010
Pontiac G614 cu ft27yes2010
Pontiac GTO13 cu ft26yes2006
ROWS 8·SOURCE EPA interior volume + ForCar

Across Pontiac the trunk averages 14.5 cu ft, against 15.4 cu ft for every car we measure.

Pontiac models by cargo space

From the roomiest down — 11 models with a measured trunk.

FIG.01·Pontiac models by cargo space
ModelCargoChecked suitcasesCabin
Pontiac Vibe20 cu ft396 cu ft
Pontiac Bonneville18 cu ft3110 cu ft
Pontiac G817 cu ft2107 cu ft
Pontiac Grand Prix16 cu ft2100 cu ft
Pontiac Grand Am15 cu ft292 cu ft
Pontiac G514 cu ft286 cu ft
Pontiac G614 cu ft296 cu ft
Pontiac GTO13 cu ft291 cu ft
Pontiac Sunfire13 cu ft292 cu ft
Pontiac G312 cu ft291 cu ft
Pontiac Wave7 cu ft191 cu ft
ROWS 11·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 11 Pontiac 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 14.5 cu ft Pontiac averages becomes 11.6 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 Pontiac here swallows 3 checked cases. Numbers are deliberately conservative; if we say four cases fit, four cases fit.

Everything on Pontiac
Recalls431 campaignsFuel economy30 mpg bestReliabilityEvery model rankedCommon problems24,842 complaintsCheck a VINBy production runDimensionsSize and weightWhat yours is worthValuation by modelWindow stickersOriginal Monroney labelsDecode a VINWhat each character meansAbout the brand17 models tracked

Frequently asked questions

Which Pontiac has the most cargo space?

The roomiest holds 20 cu ft. The table above sorts every Pontiac model from the largest trunk down.

What is the average Pontiac cargo space?

14.5 cu ft across 11 models — about 2 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, 11 measurements across 11 Pontiac models, seats up. Luggage capacity computed by ForCar at 80% usable volume against airline-standard case sizes. Last updated Nov 2026. — ForCar Reviewed by , founder of ForCar.
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