A Tire Performance Criteria
(TPC) specification number is molded in the sidewall near the tire size of
all original equipment tires. The specification number assures that the
tire meets the following GM performance standards:
• | Rolling Resistance, etc. |
Usually, each tire size has a specific TPC number assigned. Replacement
tires should match the original tires for the following:
Replace the original tires with tires of the same TPC specification
number. Use of any other tire size or tire type may seriously affect any or
all of the following:
• | Affect the speedometer/odometer calibration |
• | Affect the vehicle ground clearance |
• | Affect the tire clearance to the body and chassis |