| Subject: | Tire Rotation on Vehicles with Different Front and Rear Tire/Wheel Sizes |
| Models: | 2004-2007 Cadillac SRX |
| 2005-2007 Cadillac STS with V8 Luxury Package Only |
| 2006-2007 Cadillac STS-V, XLR-V |
| 2005-2007 Chevrolet Corvette |
| 2005-2007 Pontiac Grand Prix GXP |
This bulletin is being revised to add the 2007 model year and the XLR-V as well as an Important statement regarding SRX models. Please discard Corporate Bulletin Number 05-03-10-015 (Section 03 - Suspension).
Important: The 2007 Cadillac SRX Sport with RPO R1T is equipped with 20" wheels. The front and rear tire/wheel assemblies are the same size. Customers with this vehicle are able to rotate their tires.
The above listed vehicles are manufactured with tire/wheel assemblies that are different from front to rear. In this case, the tires should not be rotated.
If a customer requests to have the tires rotated during normal maintenance, explain to them that the tire/wheel assemblies of their vehicle were designed to be different sizes to enhance the vehicle's handling performance.
Important: Changing the tire/wheel sizes or rotating the tires may affect the vehicle's handling and ride characteristics. GM DOES NOT recommend changing the OEM tires or wheels.
