Engine Serpentine Belt - Chirping Noise
GMC NUMBER: 87-T-65GROUP: 6B - Engine Cooling
DATE: July, 1987
CORPORATE
NUMBER: 766204
SUBJECT: SERPENTINE BELT "CHIRP"
MODELS: 1987 S/T MODELS WITH 2.8L (VIN CODE R) ENGINES, N40 POWER STEERING AND
WITHOUT AIR CONDITIONING (A/C)
Some 1987 S/T trucks with 2.8L V6 engines, N40 power steering, and without A/C may experience a "chirp" noise from the serpentine belt. This noise may be caused by high belt load conditions.
FIGURE NO. 1:
If this condition is encountered, it can be repaired by removing and discarding the belt idler pulley and replacing the belt with P/N 10069211 (see Figure No. 1). Use the procedures in Section 6B1 - Engine Cooling for belt replacement.
This change was made in production beginning with the following VIN breakpoints:
Pontiac Chevrolet H0124149
GMC H0506673
Moraine Chevrolet H2146612
GMC H2509701
Shreveport Chevrolet H8142478
GMC H8512179