Tires/Wheels
TiresGM offers two tires; the Bridgestone Dueler Alenza HL P255/55R20 107H AL3, GM P/N 19162355 or 19239588, to be used in conjunction with the 20" accessory wheels. The Bridgestone Dueler Alenza HL tire has a Tire Performance Criteria (TPC) spec, molded on the sidewall, that meets or exceeds all Federal Safety guidelines.
Tire Changers
Dealers must have the correct level of tire changing equipment to perform tire changing services. GM requirements and recommendations for servicing glamour wheels are as follows:
- Rim Clamp design
- Runflat capable (preferred)
- Side mounted bead breaking to reduce stress on the wheel and tire
- No metal contact to the wheel at the clamping jaws
- Protective devices to prevent damage during mounting and dismounting operations
- Regulated air pressure to protect user and wheel assembly
- Approved lubricant to avoid wheel slip and damage to the wheel
For further information regarding equipment meeting the requirements for this program, call 1-800-GM-TOOLS.
Important
When mounting the tires, rubber lubricant, GM P/N 12345884 (in Canada, 88863415), must be used. Also, the vehicle should not be driven aggressively (hard acceleration or braking) for at least 6-8 hours after tire mounting to allow the lubricant to dry. Failure to do so may cause the tire to slip on the rim. This condition will affect wheel balance which could result in a vibration.
Balancing
Use only stick-on weights mounted on the outboard center of the rim (behind the spokes).
Balancing of the tire and wheel assembly must be performed on a computerized balancer, capable of static and dynamic wheel balance modes. Assemblies should be balanced to within 1/4 ounce on either rim flange. Proper cones and adapters should be used, free of nicks and burrs to ensure proper balancing.
Wheels
Wheel (Lug) Nuts
Each wheel nut should be torqued in the appropriate torque sequence (refer to graphic) and to 190 Nm (140 lb ft). The torque should be rechecked after the first 160 km (100 mi). To help protect the wheels from theft, a wheel lock kit is also available.
Caution
Incorrect wheel nuts or improperly tightened wheel nuts can cause the wheel to become loose and even come off. This could lead to an accident. Be sure to use the correct wheel nuts.
Care / Cleaning
Use soap, hot water and a 100% cotton cloth to clean and polish the new wheels. If using a wheel cleaner, be sure to select one that will not harm the wheel surface, such as GM Chrome and Wire Wheel Cleaner, P/N 1052929 (in Canada, use 10953202). Avoid car washes that use carbide tipped brushes, as these may damage the wheel's finish. Periodically clean the backside of the wheel to remove road grime, brake dust and grease.