SERVICE MANUAL UPDATE (ABS) REVISED DIAGNOSTICS CHART

SUBJECT: SERVICE MANUAL UPDATE ANTI-LOCK BRAKE SYSTEM REVISED DIAGNOSTIC CHARTS

MODELS/YEARS: 1988-90 EIGHTY-EIGHT, NINETY-EIGHT, TORONADO

This bulletin replaces Dealer Technical Bulletin 90-T-161, which should be discarded.

The original information contained in System Diagnosis Chart B and Chart B-5 in the 1988-90, Eighty-Eight and Ninety-Eight, and 1988-90 Toronado Service Manuals is incorrect. Please use the following charts.

Please mark a reference to this bulletin in your copy of the affected Service Manuals as follows:

Service Manuals Pages --------------------------------- ----------------- 1989-90 Eighty-Eight & Ninety-Eight 5E1-43 and 5E1-53 1988-89 Toronado 5E1-57 and 5E1-67 1990 Toronado 5E1-53 and 5E1-63

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.