K 1500 Truck 4WD V8-393 6.5L DSL Turbo VIN S (1996)
Suspension Travel Bumper: Customer Interest
Suspension, Rear - Bottoms Out on Bumps in Cold Weather
File In Section: 3 - Steering/Suspension
Bulletin No.: 66-34-03
Date: August, 1996
Subject:
Rear Suspension Bottoms Out in Cold Weather
(Replace Jounce Bumpers)
Models:
1995-96 Chevrolet and GMC K1 4 Door Models
Built prior to the Following VIN Breakpoints:
Model
VIN Breakpoint
Chevrolet
TJ347233
GMC
TJ719094
Condition
An owner may report that in cold weather, when the temperature is 20° F (-7° C) or colder, the rear suspension bottoms out over some bumps.
Cause
The jounce bumper material does not adequately dampen suspension jounce when cold. A new jounce bumper has been designed that absorbs more
jounce energy in cold temperatures.
Correction
Replace the jounce bumpers with the redesigned parts.
Service Procedure
1.
Assemble replacement bumper assemblies, P/N 15023225, to brackets, P/N 15023224, using nut, P/N 11516072. Tighten nut to 47 Nm (35 lb ft).
2.
Raise the vehicle on a hoist.
3.
Remove the nuts holding the axle bumper brackets to the frame rails.
4.
Install replacement axle bumper assemblies and brackets to the frame.
Tighten
Tighten nuts to 47 Nm (35 lb ft).
5.
Lower vehicle.
Parts Information
P/N
Description
Qty.
15023225
Bumper Assembly
2
15023224
Bracket
2
11516072
Nut
2
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
