For 1990-2009 cars

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

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

#### VEHICLES AFFECTED: 1992 "C AND H" MODELS

Code 24 (Chart 1) found in the 1992 C and H service manuals contain an error that could lead to confusion and misdiagnosis of the SIR system (driver only).

The enclosed revised chart should replace the following pages for proper SIR system diagnosis:

1992 Pontiac Bonneville SE, page 9J-A-47 1992 Pontiac Bonneville SSE/SSEi, page 9J-A1-47 1992 Oldsmobile Eighty-Eight, page 9J-A-47 1992 Oldsmobile Ninety-Eight, page 9J-A-47

Please update your respective Service Manual 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.