Section 854 (Transfer Case - NVG 236/246-NP8)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. 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 B0790: Neutral Indicator Control Circuit Voltage
- DTC B2725: Range/Mode 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: Motor Circuit Voltage
- DTC C0321: Open Lock Solenoid Coil, Open Motor Lock Control Circuit, Or Open Motor Lock Feed Circuit
- DTC C0327: Encoder Signal Feed Back Voltage
- DTC C0359: 4WD LO Output Circuit Voltage High
- DTC C0374: Unable To Correct Sensed Wheel Slip
- DTC C0379: Front Axle Switch Voltage
- DTC C0550: Checksum Test Indicating Invalid Data
- 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
- Service Indicator Always On
- Service Indicator Inoperative
- Transfer Case Shift Control Switch Indicator Always On - Two or More
- Transfer Case Shift Control Switch Indicator Flashes, then Returns to Previous Mode
- Transfer Case Shift Control Switch Indicators Flash Continuously 15 Seconds or More
- Transfer Case Shift Control Switch Indicator Inoperative - One or More
- 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 Clunk during Acceleration and Deceleration
- Transfer Case Shudder or Binding
- Transfer Case Will Not Shift
- Transfer Case Jumps Out of Gear
- Transfer Case Leak Diagnosis
- Repair Instructions
- Transfer Case Shield Replacement
- Transfer Case Fluid Replacement
- Transfer Case Encoder Motor Replacement
- Transfer Case Speed Sensor Replacement - Front
- Transfer Case Speed Sensor Replacement - Left Rear
- Transfer Case Speed Sensor Replacement - Right 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
- Transfer Case Shift Control Module Replacement
- Transfer Case Control Module Reprogramming
- Description and Operation
- Special Tools and Equipment