Section 946 (Transfer Case (NVG226-NP8))
WARNING: This page is about a different car, the 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Transfer Case
- Diagnostic System Check - Transfer Case
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B0770: AWD Indicator Control Circuit Voltage
- DTC B0775: 4HI Indicator Control Circuit Voltage
- DTC B0780: 4LO Indicator Control Circuit Voltage
- DTC B0785: 2HI Indicator Control Circuit Voltage
- DTC B0790: Neutral Indicator Control Circuit Voltage
- DTC B2725: Switch Signal Circuit Voltage
- DTC C0300: Open, Short To Ground, Short To Voltage Or Faulty Sensor
- DTC C0305: Open, Short To Ground, Short To Voltage Or Faulty Sensor
- DTC C0306: Open, Short To Voltage, Or Short To Ground In Motor Control A Or Motor Control B Circuits, Or An Open, Or Short To Ground Inside Motor
- DTC C0321: Open Lock Solenoid Coil, Open Motor Lock Control Circuit, Or An Open Motor Lock Feed Circuit
- DTC C0327: Out-Of-Range Reading From The Encoder Signal, A Short To Voltage On 5 V Reg. Encoder Circuit
- DTC C0359: Short To Ground, Short To Voltage, Or An Open In The 4WD Lo Circuit
- DTC C0374: Unable To Correct Sensed Wheel Slip
- DTC C0379: Front Axle Control Circuit Short To Ground, Short To Voltage, Or An Open Circuit
- DTC C0550: Critical Operational Parameters Stored In EEPROM Have Failed, Checksum Error
- Symptoms - Transfer Case
- Front Axle Will Not Engage
- Front Axle Will Not Disengage
- Transfer Case Shift Control Switch Inoperative
- No Correction for Slip in AWD Mode
- Transfer Case Shift Control Switch Indicator Always On - Two or More
- Transfer Case Shift Control Switch Indicator Flashes 10 Seconds, then Returns to Previous Mode
- Transfer Case Shift Control Switch Indicators Flash Continuously
- Transfer Case Shift Control Switch Indicator Inoperative - One or More
- Service Indicator Always On
- Service Indicator Inoperative
- Transfer Case Popping Noise
- Transfer Case Whine or Rumble Noise
- Transfer Case Growl or Grinding Noise
- Transfer Case Grating Noise
- Transfer Case Clunk in 2HI Only
- Transfer Case Clunk in 4HI
- Transfer Case Clunk in 4LO
- Transfer Case Shudder or Binding
- Transfer Case Leak Diagnosis
- Repair Instructions
- Transfer Case Shift Control Module Replacement
- Transfer Case Control Module Reprogramming
- Transfer Case Fluid Replacement
- Transfer Case Motor/Encoder Replacement
- Transfer Case Speed Sensor Replacement (Front)
- Transfer Case Speed Sensor Replacement (Right Rear)
- Transfer Case Speed Sensor Replacement (Left Rear)
- Transfer Case Output Shaft Seal Replacement - Front
- Transfer Case Output Shaft Seal Replacement - Rear
- Transfer Case Assembly Replacement
- Transfer Case Input Shaft Seal Replacement
- Transfer Case Adapter Replacement
- Transfer Case Shift Control Switch Replacement (GMC)
- Transfer Case Shift Control Switch Replacement (Chevrolet/Oldsmobile)
- Description and Operation
- Special Tools and Equipment