GMC chervolet camaro 1999 Service Manual page 50

General Information
A Process of Elimination
You must understand a few basic concepts before
attempting to diagnose a vibration. As in any
diagnostic process, you must perform the
following steps:
• Gather the information
• Decipher the information
• Make your correction based on the results
Road test the vehicle and inspect the vehicle in a
manner which systematically eliminates different
components. This process supplements the
information which you have received from the
customer concerning the complaint. Concentrating
efforts on the areas that have not been eliminated will
make repairs faster and more effective.
1
Legend
(1) Hard Cornering, Under Inflation
(2) Excessive ioe on Non-Drive Axle
2
Vibration Diagnosis and Correction 0-47
Tire and Wheel Inspection
182126
The tires on all new GM models have a tire
performance criteria (TPC) rating number molded on
the sidewall. The TPC rating will appear as a
4-digit number preceded by the letters TPC SPEC on
the tire wall near the tire size. A replacement tire
should have the same TPC rating.
2 3
95607
(3) Heavy Acceleration on Drive Axle, Excessive
Toe on Drive Axle, Over Inflation