Notice: Use a tire changing machine in order to dismount tires. Do not use hand tools or tire irons alone in order to remove the tire from the wheel. Damage to the tire beads or the wheel rim could result.

Notice: Do not scratch or damage the clear coating on aluminum wheels with the tire changing equipment. Scratching the clear coating could cause the aluminum wheel to corrode and the clear coating to peel from the wheel.

Notice: Damage to either the tire bead or the wheel mounting holes can result from the use of improper wheel attachment or tire mounting procedures. It takes up to 70 seconds for all of the air to completely exhaust from a large tire. Failure to follow the proper procedures could cause the tire changer to put enough force on the tire to bend the wheel at the mounting surface. Such damage may result in vibration and/or shimmy, and under severe usage lead to wheel cracking.

1. Deflate the tire completely.

Important: Rim-clamp European-type tire changers are recommended.

Important: Before the tire is removed from the wheel, note the following items to avoid tire pressure sensor damage upon tire dismounting.

•	Place the sensors cap and valve on a dry clean surface after removal, the cap is aluminum and the valve is nickel plated to prevent corrosion and are not to be substituted with a cap or valve made of any other materiel.

•	When separating the tire bead from the wheel, position the bead breaking fixture 90 degrees from the valve stem.

•	Position the mounting/dismounting head so the tire iron, or pry bar can be inserted slightly clockwise of the sensor body when prying the tire bead up and over the mounting/dismounting head.

•	Using the tire machine, rotate the tire/wheel assembly clockwise when transferring the tire bead to the out side of the wheel rim.

•	Repeat items for inner bead.

2. Use the tire changer in order to remove the tire from the wheel.
3. Remove all residual liquid sealant from the inside of the tire and wheel surfaces. If any tire sealant is noted upon tire dismounting on vehicles equipped with TPM, replace the tire pressure sensor. Refer to Tire Pressure Indicator Sensor Replacement .
4. Use a wire brush or coarse steel wool in order to remove any rubber, light rust or corrosion from the wheel bead seats.

Notice: When mounting the tires, use an approved tire mounting lubricant. DO NOT use silicon or corrosive base compounds to lubricate the tire bead and the wheel rim. A silicon base compound can cause the tire to slip on the rim. A corrosive type compound can cause tire or rim deterioration.

5. Apply GM P/N 12345884 (Canadian P/N 5728223,) or equivalent to the tire bead and the wheel rim.

Important: Before reinstalling the tire on the wheel, note the following items to avoid tire pressure sensor damage upon tire mounting.

•	Position the mounting/dismounting head 180 degrees from the valve stem.

•	Position the bead transition area 45 degrees counter clockwise of the valve stem.

•	Using the tire machine, rotate the tire/wheel assembly clockwise when transferring the tire bead to the inside of the wheel rim.

•	Repeat items for outer bead.

6. Use the tire changer in order to install the tire to the wheel.

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.

7. Inflate the tire to the proper air pressure.
8. Ensure that the locating rings are visible on both sides of the tire in order to verify that the tire bead is fully seated on the wheel.