Current Or Intermittent DTCs And Or Inoperative Transfer Case Shifting - keywords actuator C0306 C0321 C0392 C0396 C0398 connector encoder
| Subject: | Current Or Intermittent DTCs and Or Inoperative Transfer Case Shifting |
| Models: | 2008 Chevrolet Silverado, Suburban, Tahoe |
| 2008 GMC Sierra, Yukon, Yukon XL |
| Equipped With Magna Transfer Cases NQF or NQH |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Customer may comment that the service 4x4 light is on current or intermittently and or can not shift the transfer case into any or certain modes. Technicians may find DTCs related to the encoder circuits, actuator circuits, brake circuits, rotational sensor or Incremental sensor circuits.
Recommendation/Instructions:
Inspect for water intrusion and corrosion at the encoder/actuator connector near the transfer case. If water intrusion or corrosion is found replace the encoder/actuator assembly and repair or replace the vehicle side connector and terminals as necessary.
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.
