SERVICE MANUAL UPDATE-SEC 9JA (S.I.R. SYSTEM DIAGNOSIS)

SUBJECT: SIR SYSTEM DIAGNOSIS AND SECTION 9J-A1 DRIVER ONLY SIR SYSTEM DIAGNOSIS

MODELS/YEARS: 1992 EIGHTY EIGHT AND NINETY EIGHT

Code 24 (Chart 1) found in the 1992 Eighty Eight and Ninety Eight Service Manuals contain an error that could lead to confusion and mis-diagnosis of the SIR system.

Please make the following correction to page 9J-A-47 in your copies of the 1992 Eighty Eight and 1992 Ninety Eight 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.