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1985 - 1991 Corvette: Service Bulletin: Paint Etching/Staining and Permanent Water Spotting

Subject: PAINT ETCHING/STAINING AND PERMANENT WATER SPOTTING
Model and Year:1985-91 ALL PASSENGER CARS AND TRUCKS
Source: Chevrolet Service Bulletin
Bulletin Number: 91-251-0B - (03/12/1991)

A recent long term investigation has indicated that improper car wash procedures contribute to paint staining, etching and permanent water spotting.

Dealer personnel in both new and used car facilities should be advised of the following:

- Avoid washing cars in direct sunlight

- Avoid using strong soaps or chemical detergents

- Avoid using products containing acids

- Cleaning agents should be dried promptly and not allowed to dry on surface

- Standing rinse water should be dried promptly and not allowed to air dry or sun dry on surface

- Drying with a soft chamois is recommended

Should a customer inquire about proper washing procedures, the above recommendations should be given and are in accordance with the information in the owners manuals.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.

© Copyright General Motors Corporation. All Rights Reserved

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