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.
Factory-Spec Tire Size
Varies by trim
- 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 Factory Service Manual2008 Pontiac Grand Prix Oil Type & CapacityPowered by factory manual data from our partner sites AllOEMManuals.com & WhatTypeOfOil.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.
Other Pontiac Grand Prix Years
2007 Grand Prix2006 Grand Prix2005 Grand Prix2004 Grand Prix2003 Grand Prix2002 Grand Prix2001 Grand Prix2000 Grand Prix1999 Grand Prix1998 Grand Prix1997 Grand Prix1996 Grand Prix1995 Grand Prix1994 Grand Prix1993 Grand Prix1992 Grand Prix1991 Grand Prix1990 Grand Prix1989 Grand Prix1988 Grand Prix1987 Grand Prix1986 Grand Prix1985 Grand Prix1984 Grand Prix1983 Grand Prix1982 Grand Prix1981 Grand Prix1980 Grand Prix