| Subject: | All Wheel Drive Disable Lamp On |
| Models: | 2002-2006 Buick Rendezvous |
| 2002-2005 Chevrolet Venture |
| 2005-2006 Chevrolet Uplander |
| 2002-2003 Oldsmobile Silhouette |
| 2002-2005 Pontiac Montana |
| 2005-2006 Pontiac Montana SV6 |
| Equipped With All Wheel Drive (AWD) |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Customer may comment on an all wheel drive (AWD) disable lamp on, technician may find no codes in any module.
Recommendation/Instructions:
If eSI diagnostics do not lead to a resolution inspect connector C305 and C305B at the body pass through for corrosion, if no corrosion is found suspect the differential clutch pump actuator check valve as the possible cause.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
