GM Service Manual Online
For 1990-2009 cars only

Object Number: 891581  Size: SH

For tire pressure and maximum tire load rating specification values, refer to tire loading information sticker located on rear edge of driver's side rear door.

The metric unit for tire inflation pressure is the kilopascal (kPa), although inflation pressures are usually given in both kPa and psi. To convert between kPa and psi, use the following conversion formula:

1 psi = 6.9 kPa

Important: Tire valve caps must always be installed onto the tire valve to keep dirt and moisture out of valve.

Maintaining correct tire inflation pressure is essential to proper vehicle performance. The specified inflation pressure is carefully calculated to provide satisfactory ride, stability, precise steering, acceptable tire wear, and resistance to road damage.

Tire inflation pressure should be checked when tires are cold. Cold tires are defined as tires on a vehicle that has not been driven for at least three hours or more than one mile.

It is normal for the tire inflation pressure to increase 28 kPa (4 psi) as vehicle is driven distances more than one mile, as the tires heat up. Therefore, on a vehicle with warm tires, never attempt to correct tire pressure by letting air out of the tire; wait until the tire cools down to check and adjust tire pressure. Letting air out of a warm tire reduces cold inflation pressure.