MANUAL UPDATE SEC.8A HEATER & A/C PROGRAMMER TEST A TABLE 1

Model and Year: 1989 Y CAR

This bulletin covers Service Manual Section 8A, page 68-3, Heater and A/C Programmer Test A (Table 1) which is incorrect. Two voltage measurements in the table are incorrect. Correct the table to read as follows:

Measure Correct For Between Voltage Diagnosis ------- ------- --------- T (Lt Blu) and 5 Volts See 6 R (Blk)

U (Tan) and Between See 7 R (Blk) 0.5 and 5 volts

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.