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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1580 (Instrument Panel, Gages, And Console) >> Repair Instructions >> Instrument Panel (I/P) Harness Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the battery negative cable.
  2. Disable the SIR. Refer to DISABLING & ACTIVATING AIR BAG SYSTEM .
  3. Remove the front seats. Refer to SEAT REPLACEMENT - FRONT BUCKET  in Seats.
    4. Fig 1: Identifying Body Wiring Harness
    G01640941Courtesy of GENERAL MOTORS CORP.
  4. If replacing the I/P harness on a TrailBlazer, Envoy or Bravada, remove the rear seat cushions. Refer to SEAT CUSHION REPLACEMENT - REAR NO. 1 (TRAILBLAZER, ENVOY, BRAVADA)  in Seats
  5. If replacing the I/P harness on TrailBlazer EXT or Envoy XL, remove the second row seats. Refer to Seat SEAT SYSTEM  in Seats
  6. Remove the center console. Refer to CONSOLE REPLACEMENT  
  7. Remove the instrument panel (I/P). Refer to INSTRUMENT PANEL (I/P) ASSEMBLY REPLACEMENT   . 
  8. Fold the front portion of the rear carpet in order to reveal the I/P harness connected to the rear electrical center. Refer to INTERIOR TRIM  or INTERIOR TRIM  in Interior Trim.
  9. Remove the I/P harness from the rear electrical center. Refer to WIRING SYSTEMS (GENERAL INFORMATION)  in Wiring Systems.
  10. Disconnect the inline I/P harness electrical connectors from the body wiring harness electrical connector.
  11. If replacing the I/P harness on a TrailBlazer, Envoy or Bravada, remove the I/P harness electrical connectors from the cellular communication Module. Refer to COMMUNICATION INTERFACE MODULE REPLACEMENT (TRAILBLAZER, ENVOY, BRAVADA)  or COMMUNICATION INTERFACE MODULE REPLACEMENT (TRAILBLAZER EXT, ENVOY XL)  in Cellular Communication.
  12. If replacing the I/P harness on a TrailBlazer EXT or Envoy XL, disconnect the two inline I/P wire harness electrical connectors from the body harness.
  13. Remove the HVAC support bracket from the I/P substrate. Refer to INSTRUMENT PANEL (I/P) CARRIER REPLACEMENT   . 
    Fig 2: Removing Instrument Panel Harness Electrical Connectors
    G01640942Courtesy of GENERAL MOTORS CORP.
  14. Disconnect the park brake electrical connector (2).
  15. Disconnect the automatic transmission shift interlock electrical connector (1).
    16. Fig 3: Disconnecting Automatic Transmission Shift Interlock Electrical Connector & Park Brake Electrical Connector
    G01640943Courtesy of GENERAL MOTORS CORP.
  16. Disconnect the sensing diagnostic module (SDM) electrical connectors.
  17. Disconnect the 10-way in line electrical connector located near the SDM.
  18. Disconnect the 4-way in line electrical connector located near the SDM.
  19. Disconnect the electrical connector (3) from the HVAC evaporator blower motor resister pack.
  20. Disconnect the electrical connector (2) from the passenger temperature valve.
  21. If equipped, release the rosebud that retains the theft deterrent shock sensor to the I/P support bracket.
    22. Fig 4: Disconnecting Electrical Connector From HVAC Evaporator Blower Motor Resister Pack
    G01640944Courtesy of GENERAL MOTORS CORP.
  22. Disconnect the SIR electrical connector (1).
  23. Remove the splice pack retaining bolt located at the front of the shift lever bracket.
  24. Disconnect the electrical connectors (1) from the discharge air temperature sensors.
  25. Disconnect the electrical connector (2) from the auxiliary blower motor.
    Fig 5: Disconnecting Electrical Connectors From Auxiliary Blower Motor & Discharge Air Temperature Sensors
    G01640945Courtesy of GENERAL MOTORS CORP.
  26. Disconnect the electrical connector (2) from the accelerator pedal sensor.
  27. Disconnect the electrical connector from the stop lamp switch (1).
  28. Remove the connector retaining bolt and disconnect the electrical connector (3) from the steering column.
    Fig 6: Disconnecting Electrical Connectors From Steering Column, Switch & Sensor
    G01640946Courtesy of GENERAL MOTORS CORP.
  29. If equipped, disconnect the electrical connector from the clutch pedal switch.
    Fig 7: Disconnecting Electrical Connector From Clutch Pedal Switch
    G01640947Courtesy of GENERAL MOTORS CORP.
  30. Remove the bolts (1) that retain the I/P wire harness to the left I/P support bracket.
    Fig 8: Removing Instrument Panel Wire Harness Bolts
    G01640948Courtesy of GENERAL MOTORS CORP.
  31. Disconnect the electrical connectors (1) from the transfer case shift control module, located near the left side of the steering wheel support bracket.
  32. Partially remove the HVAC module assembly in order to gain access to the remaining electrical connectors. Refer to HVAC MODULE ASSEMBLY REPLACEMENT  in Heating Ventilation and Air Conditioning.
    Fig 9: Disconnecting Electrical Connectors From Transfer Case Shift Control Module
    G01640949Courtesy of GENERAL MOTORS CORP.
  33. Disconnect the electrical connector (1) from the HVAC discharge air temperature sensor.
  34. Disconnect the air inlet electrical connector (2) from the HVAC actuator.
    Fig 10: Disconnecting Electrical Connector From HVAC Discharge Air Temperature Sensor
    G01640950Courtesy of GENERAL MOTORS CORP.
  35. Disconnect the defroster (4), air conditioning (3), and driver's side temperature valve (2) electrical connectors from the HVAC actuators.
  36. Disconnect the discharge air temperature electrical connector (1) from the HVAC actuator.
  37. Open the hood.
  38. Remove the air inlet grille in order to gain access to the windshield wiper motor. Refer to AIR INLET GRILLE PANEL REPLACEMENT  in Wipers/Washer Systems.
    Fig 11: Disconnecting Discharge Air Temperature Electrical Connector From HVAC Actuator
    G01640951Courtesy of GENERAL MOTORS CORP.
  39. Remove the I/P harness retaining clip from the plenum weld stud.
  40. Disconnect the I/P harness electrical connector (1) from the windshield wiper motor.
    Fig 12: Disconnecting Instrument Panel Harness Electrical Connector From Windshield Wiper Motor
    G01640952Courtesy of GENERAL MOTORS CORP.
  41. Disconnect the I/P harness inline electrical connector (1) from the forward lamp harness.
  42. Disconnect the battery positive cable terminal (2) from the underhood junction block.
  43. Disconnect the 2 I/P harness two-way electrical connectors (3) from the underhood junction block base.
    Fig 13: Disconnecting Instrument Panel Harness Inline Electrical Connector, Battery Positive Cable Terminal & Two-Way Electrical Connectors
    G01640953Courtesy of GENERAL MOTORS CORP.
  44. Disconnect the I/P harness inline electrical connector from the chassis inline wiring harness.
    Fig 14: Disconnecting Instrument Panel Harness Inline Electrical Connector From Chassis Inline Wiring Harness
    G01640954Courtesy of GENERAL MOTORS CORP.
  45. Remove the ground terminals (2) from the front fender.
  46. Remove the nut (1) that retains the ground terminals to the weld stud located on the front plenum.
    Fig 15: Removing Ground Terminals & Retaining Nut
    G01640955Courtesy of GENERAL MOTORS CORP.
  47. Disconnect the I/P harness electrical connector (2) from the powertrain control module.
  48. Disconnect the I/P harness inline electrical connector (1) from the engine harness inline electrical connector.
  49. Remove the I/P harness grommet from the bulkhead.
  50. Pass the exterior portion of the I/P harness through the bulkhead.
  51. Remove the I/P harness from the vehicle.
    Fig 16: Disconnecting Instrument Panel Harness Electrical Connector From Powertrain Control Module
    G01640956Courtesy of GENERAL MOTORS CORP.
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