ELECT. SYSTEMS MANUAL UPDATE SIR SYS. DIAG. CODE 24, 25, 26

SUBJECT: ESM UPDATE - SIR SYSTEM DIAGNOSIS CODE 24,25 OR 26 SET (REVISED DIAGNOSTICS)

VEHICLES AFFECTED: 1992-93 "C/H" MODELS

APPLICATION:

----------- 1992-93 Buick LeSabre and Park Avenue/Ultra.

The SIR system diagnosis found in the above mentioned manuals has been revised to avoid confusion.

The enclosed revision should replace the following pages for proper SIR system diagnosis.

1992 LeSabre, Electrical Systems Manual, page 130 1993 LeSabre, Park Avenue/Ultra, Electrical Systems Manual, page 315

Please update your respective service manuals accordingly.

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.