Service Update for Inventory and Customer Vehicles - Steering Wheel Vibration - Replace Front Brake Rotors

THIS SERVICE UPDATE INCLUDES VEHICLES IN DEALER INVENTORY AND CUSTOMER VEHICLES THAT RETURN TO THE DEALERSHIP FOR ANY REASON. IT WILL EXPIRE AT THE END OF THE INVOLVED VEHICLE'S NEW VEHICLE LIMITED WARRANTY PERIOD.

This bulletin provides a service procedure to replace the front brake rotors on certain 2008 model year Chevrolet Cobalt SS vehicles. On some of these vehicles, the front brake rotors may not be to GM’s specification, resulting in a vibration in the steering wheel or brake pulsation during light braking between 48-56 km/h (30-35 mph) and 97-113 km/h (60-70 mph).

This service procedure should be completed as soon as possible on involved vehicles currently in dealer inventory and customer vehicles that return to the dealer for any type of service during the New Vehicle Limited Warranty coverage period.

A list of involved vehicles currently in dealer inventory is available on the "Service Update Bulletin Information" link under the "Service" tab in DealerWorld (US), or attached to the Dealer Communication (Canada), used to release this bulletin. Customer vehicles that return for service, for any reason, and are still covered under the vehicle's base warranty, and are within the VIN breakpoints provided below, should be checked for vehicle eligibility in the appropriate system listed below.

Important: Dealers are to confirm vehicle eligibility prior to beginning repairs by using the GM Vehicle Inquiry System (GMVIS). Not all vehicles within the above breakpoints may be involved.

Parts required to complete this service update are to be obtained from General Motors Service and Parts Operations (GMSPO). Please refer to your "involved vehicles listing" before ordering parts. Normal orders should be placed on a DRO = Daily Replenishment Order. In an emergency situation, parts should be ordered on a CSO = Customer Special Order.

1. Remove the driver and passenger side front brake rotors from the vehicle. Refer to Front Brake Rotor Replacement in SI.
2. Install two new front brake rotors. Refer to Front Brake Rotor Replacement in SI.

For vehicles repaired under this service update, use: for details on Product Campaign Claim Submission.