See also:

Buying New Tires
GM has developed and matched specific tires for the vehicle. The original equipment tires installed were designed to meet General Motors Tire Performance Criteria Specification (TPC Spec) system rat ...

Treadwear
The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 ...

Coverage
Services are provided up to 5 years/160 000 km(100,000mi), whichever comes first. In the U.S., anyone driving the vehicle is covered. In Canada, a person driving the vehicle without permiss ...