SERVICE MANUAL UPDATE SEC. 9J-A-9 CORRECT S.I.R.

SUBJECT: SERVICE MANUAL UPDATE - SECTION 9J-A-SIR (CORRECT SIR DIAGNOSTIC SYSTEM CHECK TROUBLE TREE)

VEHICLES AFFECTED: 1990 C, E, K

The attached "SIR DIAGNOSTIC SYSTEM CHECK" trouble tree replaces the information found in the Service Information Manual on page 9J-A-9 as indicated in figure.

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.