GM Service Manual Online
For 1990-2009 cars only

Object Number: 70078  Size: MH

All GM vehicles now use P-metric sized tires. P-metric tires are available in two load ranges: standard load (241 kPa/35 psi maximum), and extra load (283 kPa/41 psi maximum). Most passenger car tires are standard load. Most P-metric tire sizes do not have exact corresponding alphanumeric tire sizes. For this reason, replacement tires should be the same TPC specification number (same size, load range and construction) as those originally on the vehicle. If P-metric tires must be replaced with other sizes, a tire dealer should be consulted. Tire companies can better recommend the closest match of alphanumeric to P-number sizes with their own tire lines.


Object Number: 175269  Size: SH

Refer to the tire placard located in the left front door lock pillar.