Document ID# 2042853

Subject: Chrome Wheel And Trim Corrosion - keywords body door molding tire warranty #PIT4548 - (12/06/2007)

Models: All GM Passenger Cars and Trucks

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
Chrome wheels and other chrome trim may become corroded if not washed after driving on roads that have been sprayed with magnesium, calcium or sodium chloride.
These chlorides are used on roads for conditions such as ice or dust. The damage is not covered by the vehicle's warranty. Always wash the vehicle's chrome with soap and water after exposure.

Recommendation/Instructions:
Engineering is evaluating a product known as Wheel Wax and it is in the preliminary stage.
However, some have reported successful use of this product as a barrier against the corrosive effects of chloride sprays listed above. More information is available at www.wheelwax.com.

Note: The use of this product or any like it, would be at the customer's choice and expense. It is still recommended to wash the vehicle's chrome with soap and water after exposure, even if using this product.