GM Service Manual Online
For 1990-2009 cars only

Object Number: 70071  Size: SH

Object Number: 70081  Size: SH

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.

Remove the wheel hub cap prior to mounting or dismounting a tire from a wheel. Use a tire changing machine to mount or dismount tires. Follow the equipment manufacturer's instructions. Do not use hand tools or tire irons to change a tire as they may cause the following damage:

    • May damage the tire beads.
    • May damage the wheel rim flanges.
    • May damage theTPMS sensor/transmitter.

Important: Do not lubricate the tire beads or wheel rims with lubrication containing silicone.

Clean the rim bead seats with a wire brush or a coarse steel wool to remove old rubber and light rust or corrosion. Clean and lubricate with an approved tire lubricant the bead area before mounting or dismounting a tire. Inflate the mounted tire to 275 kPa (40 psi) so that beads are completely seated.

Take care when mounting or dismounting tires on vehicles equipped with the Tire Pressure Monitoring System (TPMS). Position the tire and wheel assembly on the changing machine so that the upper/lower bead breaker or other tire changing tools will not contact the wheel sensor during the tire mounting or dismounting. Many tire changing machines have upper and lower bead breakers located 180° apart that operate simultaneously. On such machines, locate the valve stem midway between the two bead breakers so that the wheel sensor is at least 90° away from either breaker.

Install the valve core and inflate to the pressure specified on the tire placard at the rear of the driver's door. Check the locating rings of the tire to be sure they show evenly around the rim flanges on both sides of the wheel.

Magnesium Wheel Refinishing (Export Only)

Magnesium wheels are not to be refinished. Only minor scratches or nicks may be touched up.