For 1990-2009 cars

# SERVICE MANUAL UPDATE-SEC. 8A LOW COOLANT MODULE DIAGNOSIS

#### MODELS/YEARS 1989 EIGHTY-EIGHT AND NINETY-EIGHT MODELS

The 1989 Eighty-Eight and Ninety-Eight Service Manual is missing the Low Coolant Module Diagnostics in "Cell"77" of Section 8A.

Refer to the Low Coolant Module Diagnostics on the back of this bulletin.

Please mark a reference to this bulletin in your copy of the 1989 Eighty-Eight and Ninety-Eight Service Manual at Page 8A-77-6.

The Low Coolant feature of RPO Y67, Reminder package, was deleted from production after November 13, 1988.

LOW COOLANT Indicator lights Check Instrument Cluster and YEL/BLK (68) when coolant level is OK wire for a short to (EARLY PRODUCTION ONLY). ground. If OK, replace Low Coolant Module.

LOW COOLANT Indicator does If chime does not sound, do LOW COOLANT not light when coolant level MODULE TEST. is low (EARLY PRODUCTION ONLY). If chime sounds, check "LOW COOLANT" Indicator bulb and related wiring.

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.