R 10 P/U 2WD L6-292 4.8L (1988)
Suspension Spring ( Coil / Leaf ): All Technical Service Bulletins
Suspension - Noise From the Rear Spring Area
Number: 90-393-3D
Section: 3D
Date: December 1990
Corporate Bulletin No.: 063401R
Subject:
REAR AUXILIARY SPRING NOISE
Model and Year:
1988-90 C2, C3 AND K3 TRUCKS
TO: ALL CHEVROLET DEALERS
THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO. 90-366-3D, DATED OCTOBER 1990. THE MODELS
INVOLVED HAVE BEEN RESTRICTED AND VIN BREAKPOINTS HAVE BEEN CHANGED. ALL COPIES OF 90-366-3D SHOULD BE
DISCARDED.
Some 1988 - 1990 C2, C3 and K3 trucks equipped with auxiliary rear springs may experience a noise from the rear spring area. This noise may be
described as a slap sound and is caused when the auxiliary, or second stage springs, contact the spring stops.
Figure No. 1
This condition can be repaired by replacing the existing spring stops and insulators with revised one piece spring stops. These revised spring stops
feature insulators which are molded directly to the metal stop (Figure 1).
INVOLVED VEHICLES:
All 1988-90 C2, C3 & K3 vehicles (models C20903, C/K30903 & R05 (dual rear wheels) and C/K30953 & R05) equipped with auxiliary rear springs.
