2008 Pontiac Grand Prix Tire Size & Pressure
The 2008 Pontiac Grand Prix tire size depends on trim: the GXP takes P255/45R18 99W; the Base takes P225/60R16 97S, per the factory service manual.
- GXP: P255/45R18 99W
- Base: P225/60R16 97S
GXP
Tire Specifications
| Position | Tire Size | Pressure | Load Index | Speed Rating |
|---|---|---|---|---|
| All | P255/45R18 99W | Door Placard | — | — |
| All | P225/50R18 94W | Door Placard | — | — |
Base
Tire Specifications
| Position | Tire Size | Pressure | Load Index | Speed Rating |
|---|---|---|---|---|
| All | P225/60R16 97S | Door Placard | — | — |
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More Grand Prix Specs & Repair Guides
🛢️ 2008 Pontiac Grand Prix Oil Type & Capacity →🌧️ 2008 Pontiac Grand Prix Wiper Blade Sizes →💡 2008 Pontiac Grand Prix Light Bulb Sizes →📖 2008 Pontiac Grand Prix Factory Service Manual →Powered by factory manual data from our partner network AllOEMManuals.com.
Frequently Asked Questions
What size tires does a 2008 Pontiac Grand Prix take?
It depends on the trim: GXP uses P255/45R18 99W; Base uses P225/60R16 97S.
What is the tire pressure for a 2008 Pontiac Grand Prix?
Refer to the tire pressure placard on your vehicle's driver side door jamb for exact cold inflation pressures.
What is the bolt pattern on a 2008 Pontiac Grand Prix?
Bolt pattern data is available in the factory service manual.