SERVICE MANUAL UPDATE SEC. 8A DRIVER INFORMATION CENTER

SUBJECT: SERVICE MANUAL UPDATE - SECTION 8A, DRIVER INFORMATION CENTRE

VEHICLES AFFECTED: 1990-92 "W"

This improves the Diagnostic test information in the 1990 thru 1992 Grand Prix Service Manuals Section 8A-86, Page 8A-86-9. Use the following updated diagnostic procedures when servicing the Driver Information Centre (DIC).

Add the following symptom and diagnosis to the SYMPTOM TABLE:

Symptom: SYSTEM FAILURE message is displayed (STE only).

Diagnosis: Communication with the Driver Information Centre (DIC) Module has been lost.

Check for a poor connection or an open in the DK GRN/WHT (935), YEL (936) and RED/WHT (937) wires (refer to schematic page 8A-86-0).

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.