GM Service Manual Online
For 1990-2009 cars only

Object Number: 177748  Size: SH

All vehicles are equipped with a high pressure compact spare tire. The compact spare tire uses a narrow 4 -inch wide rim, although the wheel diameter is usually 1 inch larger than the road wheels.

Do not use the compact spare tire with the following items:

    • Standard tires
        Snow tires
    • Wheel covers
    • Trim rings

If such use is attempted, damage to these items or other parts of the vehicle may occur. Use the compact spare tire only on vehicles which offered the spare tire as the original equipment.

Caution: To avoid serious personal injury, do not stand over tire when inflating. The bead may break when the bead snaps over the safety hump. Do not exceed 275 kPa (40 psi) pressure when inflating any tire if beads are not seated. If 275 kPa (40 psi) pressure will not seat the beads, deflate, relubricate the beads and reinflate. Overinflation may cause the bead to break and cause serious personal injury.

Periodically verify inflation pressure. Maintain inflation pressure at 415 kPa (60 psi). The compact spare tire can be mounted and dismounted from the wheel using present tire changing equipment and procedures. As with other tires, completely seat the beads at 275 kPa (40 psi). The tire may then be safely inflated to 415 kPa (60 psi).