Engine - Incorrect Drive Belt, A/C Compressor
88chevy30Number: 89-50-1B
Section: 1B
Date: DEC., 1988
Subject: INCORRECT A/C COMPRESSOR BELT
Model and Year: 1987-89 G30 VANS EQUIPPED WITH 5.7L CARBURETOR
(VIN CODE M) ENGINE
TO: ALL CHEVROLET DEALERS
Some 1987/88 G30 vans equipped with the 5.7L engine and air conditioning (A/C) may experience low mileage A/C compressor belt life. This condition may be caused by an incorrect belt being installed. The incorrect A/C belt (3/8" x 55") has a center cordline (CCL) too low in the belt cross section which can cause overloading of the belt.
A new A/C belt (7/16" x 55.25" "High Ride") which has a higher CCL has been released for service use. If this condition is encountered, replace the A/C compressor belt with P/N 9442377. Tighten belt to 645 N (145 lb) using belt tension gage J-23600-B or BT 33-95-ACBN. Refer to the belt replacement procedures in the Light Duty Service Manual, Section 6B, Engine Cooling.
Parts are currently available from GMSPO.
Labor Time: J0660 .5 Hr.