TrailBlazer 4WD L6-4.2L VIN S (2002)
Harmonic Balancer - Crankshaft Pulley: Technical Service Bulletins
Engine - Revised Harmonic Balancer
File In Section: 06 - Engine/Propulsion System
Bulletin No.: 02-06-01-012
Date: April, 2002
INFORMATION
Subject:
Revised Harmonic Balancer
Models:
2002 Chevrolet and GMC S/T Utility Models (TrailBlazer, Envoy)
2002 Oldsmobile Bravada
with 4.2L Engine (VIN S - RPO LL8) Built After VIN Breakpoint 22358862
A new second design Harmonic Balancer is being used on the 4.2L engine. The new second design may be used to replace the previous first design.
All first design balancers should be removed using the J 44226 removal tool. The second design balancer should be removed with a standard three jaw
puller. Refer to the Engine Mechanical sub-section of the appropriate Service Manual for complete removal and installation procedures.
The illustration shows the first and second design parts.
Parts Information
The part numbers have been changed as well. GMSPO has cancelled and replaced the first design part number with the second design part number.
Parts are currently available from GMSPO.
