SERVICE MANUAL UPDATE SEC. 5E1 (ABS DIAGNOSTIC CHART)

Subject: SERVICE MANUAL UPDATE - SEC. 5E1 ANTI-LOCK BRAKE SYSTEM (REVISED DIAGNOSTIC CHARTS)

Models Affected: 1988-90 BONNEVILLE MODELS

This bulletin is being revised to change the wording of the first and second sentences. The artwork has not been changed. This bulletin cancels and replaces bulletin 90-5-16A issued 1191. Please discard bulletin 90-5-16A.

The original information contained in System Diagnosis Chart B and Chart B-5 in the 1988-90 Bonneville service manual is incorrect.

This bulletin contains the corrected charts. Please mark a reference to this bulletin in the affected service 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.