NVG 126/226 Transfer Case Grating/Grinding Noise When 4WD is Engaged, Service 4WD Lamp On, DTC C0327 Set (Replace Clutch Pressure Plate Bearing Assembly and Clutch Lever)
| Subject: | NVG 126/226 Transfer Case Grating/Grinding Noise When 4WD is Engaged, Service 4WD Lamp On, DTC C0327 Set (Replace Clutch Pressure Plate Bearing Assembly and Clutch Lever) |
| Models: | 2004-2007 Buick Rainier |
| 2002-2008 Chevrolet TrailBlazer Models |
| 2002-2008 GMC Envoy Models |
| 2002-2004 Oldsmobile Bravada |
| 2005-2008 Saab 9-7X |
| Built Prior to September 18, 2007 (NVG 126) or September 21, 2007 (NVG 226) |
This bulletin is being revised to add the 2002 model year. Please discard Corporate Bulletin Number 08-04-21-001 (Section 04 - Transmission/Transaxle).
Condition
Some customers may comment on a grinding type noise in the transfer case when 4WD is engaged in either AUTO or 4WD mode. This noise may also be accompanied by the SERVICE 4WD lamp being illuminated and DTC C0327 set.
This condition is more prevalent on vehicles where 4WD is continuously used.
Cause
This noise may be caused by a faulty clutch pressure plate bearing.
Correction
A more robust clutch pressure plate bearing, inner plate and clutch lever has been released for service. Replace the clutch pressure plate bearing, inner plate and clutch lever. Refer to the Transfer Case Disassemble and Transfer Case Assemble procedures in SI. Former and new parts should not be intermixed during transfer case overhaul and they are to be used in sets only.
DO NOT replace the transfer case assembly unless extensive internal damage has occurred.
Parts Information
Part Number | Description |
|---|---|
19178973 | Clutch Pressure Plate Bearing Assembly with Inner Plate |
19178970 | Clutch Lever |
24242560 (NVG 126) | Transfer Case |
24242561 (NVG 226) | Transfer Case |
Warranty Information (excluding Saab U.S. Models)
For vehicles repaired under warranty, use the appropriate labor operation for the repair performed:
Labor Operation | Description | Labor Time |
|---|---|---|
K4400 | Transfer Case Assembly - R&R | Use Published Labor Operation Time |
K4410 | Transfer Case Assembly - Replace | Use Published Labor Operation Time |
Warranty Information (Saab U.S. Models)
For vehicles repaired under warranty, use:
Labor Operation | Description | Failed Object | Fault/Reason Code | Location Code | Warranty Type | Repair/Action Code | Labor Time |
|---|---|---|---|---|---|---|---|
4411001 | Transfer Case Assembly - R&R (Engine Code S) | 44100 | 47 | 0 | 01 | 01 | Use Published Labor Operation Time |
4411007 | Transfer Case Assembly - R&R (Engine Code M) | 44100 | 47 | 0 | 01 | 01 | Use Published Labor Operation Time |
4411009 | Transfer Case Assembly - Replace (Engine Code S) | 44100 | 47 | 0 | 01 | 01 | Use Published Labor Operation Time |
4411010 | Transfer Case Assembly - Replace (Engine Code M) | 44100 | 47 | 0 | 01 | 01 | Use Published Labor Operation Time |
