S15/T15 4WD P/U V6-262 4.3L (1988)
Drive Belt: All Technical Service Bulletins
Belts - Serpentine Belt Chirp
GMC NUMBER:
88-T-136
GROUP:
6A - Engine Mechanical
DATE:
August, 1988
CORPORATE
NUMBER:
836520R
SUBJECT:
SERPENTINE BELT CHIRP
MODEL:
1988 S/T TRUCK WITH 4.3L ENGINE (VIN CODE Z)
FIGURE 1
Some owners of 1988 4.3L S/T trucks may experience a chirping noise from the accessory drive belt. "Belt Chirp" is a short duration, intermittent, high
pitched sound and should not be confused with belt "squeal", which is continuous in nature. This condition can be addressed by aligning the power
steering pump pulley 3/4 mm plus or minus
1/4 mm (.030" plus or minus .010") forward of flush with the power steering pump shaft (See Figure No. 1). A wheel puller should be used to perform
this realignment.
Labor OP:
T7460
Labor Time:
.3 Hr.
