K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Speedometer Head: All Technical Service Bulletins
Instruments - Speedometer Whine or Buzzing Noise
Number:
89-99-8C
Section:
8C
Date:
FEB., 1989
Subject:
SPEEDOMETER WHINE OR BUZZING NOISE
Model and Year:
1988-89 C/K TRUCKS
TO:
ALL CHEVROLET DEALERS
Some vehicles may experience a high pitched whine or buzzing noise that originates from the speedometer when the vehicle is in motion.
A sound deadening rubber gasket has been added between the speedometer drive motor and the back of the speedometer assembly to eliminate noise in
new speedometers.
Dealers may either order the assembly from GMSPO for replacement in-house or send the I.P. cluster to their Delco Service Center for repair.
For in-house repair, the new speedometer assembly part numbers are 16131595 for early production vehicles and 16128247 for later production vehicles
with red indicator on speedometer dial.
For trucks under warranty, use:
Labor Op.
N4310
Labor Time:
.5 Hr
