For 1990-2009 cars

# SERVICE MANUAL UPDATE-SEC. 8A RADIO/AUDIO SYSTEM CHART REV.

#### SUBJECT: RADIO/AUDIO SYSTEM (ETR) CHART REVISION

MODEL/YEARS: 1993 ACHIEVA

In SECTION 8A, Cell 150 Page 4 has diagnostic information that may cause some technicians to refer to Chart 8 instead of Chart 7. At the bottom of the chart, the page number referenced, 8A-l 50-8 is correct.

#### SYMPTOM TABLE

SYMPTOM PROCEDURE PAGE NUMBER ------- --------- -----------

Weak, noisy (FM only, with Chart #7 8A-l50-8 Rear Defogge Antenna)

Noise present with ignition Chart #7 8A-150-8 Switch in "RUN." engine not running

Harsh, popping noise that Chart #7 8A-150-8 changes with engine rpm (ignition Noise)

High whine (like a siren) that Chart #7 8A-150-8 changes with engine rpm (Generator Noise)

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.