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1990 Corvette: Service Bulletin: ABS Code 63 Revised Diagnostic Chart

Subject: SERVICE MANUAL UPDATE SEC. 5E1 ABS DIAGNOSIS-REVISED CODE 63
Model and Year: 1990 CORVETTE
Source: Chevrolet Service Bulletin
Bulletin Number: 90-430-5 - (08/21/1991)

This bulletin serves to update the ABS Code 63 (Page 1 of 3) diagnostic chart on page 5E1-37 in Section 5E1 "Antilock Brake System Diagnosis" of the 1990 "Y" Service Manual. Please use the attached revised Code 63 (Page 1 of 3) diagnostic chart when diagnosing ABS Code 63 conditions on 1990 Corvettes.

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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