K 1500 Truck 4WD V8-6.0L VIN U (2001)
Rocker Arm Assembly: All Technical Service Bulletins
Engine - Needle Bearings Found Upon Oil Change
File In Section: 06 - Engine/Propulsion System
Bulletin No.: 02-06-01-029
Date: September, 2002
INFORMATION
Subject:
Needle Bearings Found in Oil Pan
(Replace Rocker Arms)
Models:
1998-2002 Chevrolet Camaro, Corvette
1998-2002 Pontiac Firebird
2002 Cadillac Escalade, Escalade EXT
1999-2002 Chevrolet Silverado
2000-2002 Chevrolet Suburban, Tahoe
2002 Chevrolet Avalanche
1999-2002 GMC Sierra
2000-2002 GMC Yukon, Yukon XL
2003 HUMMER H2
with 4.8L, 5.3L, 5.7L or 6.0L V8 Engine
(VINs V, T, G, S, U - RPOs LR4, LM7,
LS1, L56, L04, L09)
Condition
Some customers may comment or technicians may notice needle bearings being found during an engine oil change. The bearings may be found in either
the drain pan used or on the magnetic oil pan drain plug.
Cause
One or more rocker arms may have experienced a bearing failure.
Correction
1.
Inspect all of the rocker arms for bearing retainer cap failure. If one or more defective rocker arms are found, replace all 16 rocker arms. Refer to
the Engine Mechanical sub-section in the appropriate Service Manual.
2.
If no condition with the rocker arms is found, refer to the service history for previous rocker arm repair. If previous rocker arm repair was made,
then the engine may not have been thoroughly cleaned of loose roller bearings. If no previous rocker arm repair was made, then look for another
condition.
3.
Remove the oil pan and clean out any additional bearings found within the oil pan. Refer to the Engine Mechanical sub-section in the appropriate
Service Manual.
4.
Install the oil pan. Refer to the Engine Mechanical sub-section in the appropriate Service Manual.
Parts Information
Parts are currently available from GMSPO.
Warranty Information
