Chart B found in the 1992 Pontiac Bonneville SSE/SSEI and 1993 Pontiac Bonneville service manuals has been updated.
The enclosed revised chart should replace the following pages for proper SIR system diagnosis:
1992 Pontiac Bonneville SSE/SSEI, page 9J-A2-19 1993 Pontiac Bonneville, page 9J-A2-17
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.