A/C - Moan or Vibration with Compressor ON
89Chevy19Number: 88-409-1B
Section: 1B
Date: APRIL, 1989
Subject: MOAN OR VIBRATION WITH A/C RUNNING WITHOUT SERPENTINE DRIVE
Model and Year: 1985-88 B, G, F CARS WITH 4.3L, 5.0L, 5.7L (VIN CODES F, G, H, Z, 6) WITH C60 A/C
TO: ALL CHEVROLET DEALERS
This bulletin cancels and supersedes Dealer Service Bulletin 87-34 dated December, 1986, (Section 1B) and 87-72 dated February, 1987, (Section 1B). All copies of the above listed bulletins should be discarded. This bulletin expands model/year applications.
Some 1985-88 B/G and 1985-87 F cars equipped with V-8 (VIN F, G, H, or 6) or V-6 (VIN Z) engines (without serpentine accessory drive) may exhibit a moan or engine vibration when the air conditioning compressor is engaged. This condition may be corrected by the installation of a support brace to the A/C compressor mounting bracket. Refer to the illustration for installation procedure.
The following components will be required:
PART NAME PART NUMBER NUMBER REQUIRED
Support Brace 10055819 1
Stud (3/8-16) 14057002 1
Bolt (3/8-16) 9440169 1
Nut (3/8-16) 14057004 1
IMPORTANT: THE STUD SHOULD BE COATED WITH THREAD SEALANT, P/N 1052080, PRIOR TO INSTALLATION.
Parts are currently available from GMSPO.
Labor Operation Number: T1188
Labor Time: .4 Hours