G 3500 1 Ton Van V8-350 5.7L VIN K TBI (1987)
Drive Belt: All Technical Service Bulletins
Engine - Incorrect Drive Belt, A/C Compressor
Number:
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.