Tires - Possible Wheel/Tire Vibration
ENGINEERING INFORMATIONBulletin No.: 09-03-10-009
Date: June 12, 2009
Subject: EI09137 - Possible Wheel/Tire Vibration on Vehicles Equipped with P225/50R18 Goodyear Tires (Engineering Information)
Models:
2008-2010 Chevrolet Malibu
2008-2010 Pontiac G6
2008-2009 Saturn AURA
Attention:
Proceed with this bulletin ONLY if the customer has commented about this concern AND the EI number is listed in GMVIS. If the customer has not commented about this condition, or if the EI does not show in GMVIS, disregard this bulletin and proceed
with diagnostics found in published service information. THIS IS NOT A RECALL. Refer to GM Corporate Service Bulletin 04-00-89-053B for more details on the use of Engineering Information bulletins.
Condition
Important
Only vehicles equipped with 18" Goodyear Eagle LS2 P225/50R18 tires (TPC SPEC 1257 MS) are the subject of this bulletin.
Some customers may comment on a tire or vehicle vibration.
Cause
GM Engineering is attempting to determine the root cause for a concern with vibrations in the vehicles identified above and equipped with Goodyear tires. GM has a need to obtain technical information from the dealer technician during diagnosis and PRIOR to repair. As a result, this information will be used by engineering to help root cause the customer's concern.
Important
If the customer vehicle has less than 800 km (500 mi) since delivery, the vibration may be caused by flat spots on the tires. While a vehicle sits in dealer inventory for extended periods, flat spots may develop on the tires that require extended driving to be eliminated. In many cases, the vibration will correct itself as the tire regains it's original round shape.
Correction
During diagnosis of the customer's concern, document the following information.
1. What is the customer's concern? Be specific.
2. When did the customer first notice the concern?
3. Under what conditions can the concern be duplicated?
4. Does the vehicle currently exhibit the condition?
- If YES, go to Step 5
- If NO, no further repairs are possible at this time; do not proceed with this bulletin.
5. Complete the applicable sections of the Vibration Analysis Worksheet. Refer to Corporate Bulletin Number 03-00-91-001E.
6. Contact the engineer listed below and provide the data collected.
Notice
Following the recommendations in this bulletin does not override the GM guidelines for wheel balancing and alignments as described in Corporate Bulletin Number 01-03-10-012D.
Contact Information
For information and further instructions, please contact a GM engineer.
If the engineer is unable to take your call, please leave the following information in a message:
- Technician Name
- Dealer Name and Phone Number
- Complete VIN and Repair Order Number
If the engineer is unable to respond within one hour, please proceed with normal diagnostics and repair based on the information found in SI.
Warranty Information
For vehicles repaired under engineering direction, use the table above.
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