K 1500 Truck 4WD V8-6.0L VIN U (2001)
Transfer Case Clutch: All Technical Service Bulletins
Drivetrain - Transfer Case Clutch Shimming
Bulletin No.: 04-04-21-003
Date: November 10, 2004
INFORMATION
Subject:
Automatic Transfer Case Clutch Plate Shimming - Parts Availability Change
Models:
1999-2000 Cadillac Escalade
1998-2005 Chevrolet Blazer
1999-2005 Chevrolet Astro Van, Silverado, Suburban, Tahoe
2002-2005 Chevrolet Avalanche
1998-2005 GMC Jimmy
1999 GMC Suburban
1999-2005 GMC Safari Van, Sierra, Yukon, Yukon XL
1998-2001 Oldsmobile Bravada
with NV 136/236/246 Automatic Transfer Case (RPO NP4 or NP8)
While performing the transfer case clutch shimming procedure found in Service Information (SI), you may find it necessary to replace the clutch pack
selective fit shim to obtain the correct clutch pack clearance.
The selective fit shims for this repair were previously released as a kit, P/N 12474121, which contained all eight selective fit sizes. Effective
immediately, the clutch pack shims will be available individually as listed below. The shim kit, P/N 12474121, will be discontinued and no longer
available once current stock has been depleted.
Parts Information
Parts are currently available from GMSPO.
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