03-03-10-007C: Tire/Wheel Characteristics (Vibration, Balance, Shake, Flat Spotting) of GM Original Equipment Tires - (Sep 21, 2007)


Subject: Info - Tire/Wheel Characteristics (Vibration, Balance, Shake, Flat Spotting) of GM Original Equipment Tires


Models: 2008 and Prior Cars

The purpose of this bulletin is to help explain that , under certain circumstances, a customer may notice a slight tire shake within the first few miles/kilometers of vehicle operation.

Tires may be designed with a nylon overlay configuration engineered to enhance the tire's integrity at high speeds. This allows the tires to be driven at higher speeds without excessive heat buildup.

Important:

Before measuring tires on equipment such as the Hunter GSP 9700, the vehicle MUST be driven a minimum of 10 miles to ensure removal of any flat spotting.
(The tendency to "flat spot" is less likely as the tire accumulates mileage.)

When parked overnight, or for a period of time, the tires may set (flat spot) and require a few miles/kilometers before heating up to their normal operating temperature.
Until the tires warm up, a slight tire shake may be felt but should subside quickly.

Important:

DEALERS SHOULD REFRAIN FROM ATTEMPTING REPAIRS OR REPLACING COMPONENTS.