Bose Radio - Poor Sound Quality
90chevy34Number: 91-93-9A
Section: 9A
Date: October 1990
Corp. Bulletin No.: 039006
Subject: SOUND QUALITY OF BOSE RADIO
Model and Year: 1991 CAPRICE
TO: ALL CHEVROLET DEALERS
Condition:
The BOSE radio system may not have sufficient sound quality on the 1991 B model with BOSE radio (RPO UQ4). The equalization may be inadequate and the bass response may be limited.
Cause:
The original amplifier (P/N 16149121) had limited bass response and equalization. A new amplifier assembly design was used after VIN M W145367.
Correction:
Replace the amplifier assembly, located in the package shelf near the speakers, with P/N 16155131. Follow the directions in the Service Manual.
Part is currently available from GMSPO.
Warranty Information:
Labor Operation: R0896
FAILURE CODE: 92
See applicable labor time guide for labor hours.