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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 >> Installation Procedure

Installation 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. Position the I/P harness to the vehicle.
  2. Pass the exterior portion of the I/P harness through the bulkhead.
  3. Install the I/P harness grommet to the bulkhead.
  4. Connect the I/P harness inline electrical connector (1) to the engine harness inline electrical connector.
  5. Connect the I/P harness electrical connector (2) to the powertrain control module.
    Fig 1: Connecting Instrument Panel Harness Electrical Connector To Powertrain Control Module
    G01640957Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  6. Install the grounding nut (1) that retains the ground terminals to the weld stud located on the front plenum.

    Tighten 

    Tighten the nut to 10 N.m (88 lb in).

  7. Install the grounding bolt (2) that retains the ground terminals to the front fender.

    Tighten 

    Tighten the bolt to 10 N.m (88 lb in).

    Fig 2: Installing Grounding Nut & Bolt
    G01640958Courtesy of GENERAL MOTORS CORP.
  8. Connect the I/P harness inline electrical connector to the chassis inline wiring harness.
    Fig 3: Connecting Instrument Panel Harness Inline Electrical Connector To Chassis Inline Wiring Harness
    G01640959Courtesy of GENERAL MOTORS CORP.
  9. Connect the 2 two-way I/P harness electrical connectors (3) to the underhood junction block base.
  10. Connect the battery positive cable terminal (2) to the underhood junction block.
  11. Install the battery cable terminal nut.

    Tighten 

    Tighten the nut to 10 N.m (88 lb in).

  12. Connect the I/P harness in line electrical connector (1) to the forward lamp harness.
    Fig 4: Connecting Instrument Panel Harness In Line Electrical Connector To Forward Lamp Harness
    G01640960Courtesy of GENERAL MOTORS CORP.
  13. Connect the I/P harness electrical connector (1) to the windshield wiper motor.
  14. Install the I/P harness retaining clip to the plenum weld stud.
  15. Install the air inlet grille. Refer to AIR INLET GRILLE PANEL REPLACEMENT  in Wipers/Washer Systems
  16. Close the hood.
  17. Install the HVAC module assembly to the vehicle. Refer to HVAC MODULE ASSEMBLY REPLACEMENT  in Heating Ventilation and Air Conditioning.
    Fig 5: Connecting Instrument Panel Harness Electrical Connector To Windshield Wiper Motor
    G01640961Courtesy of GENERAL MOTORS CORP.
  18. Connect the discharge air temperature electrical connector (1) to the HVAC actuator.
  19. Connect the defroster (4), air conditioning (3), and drivers side temperature valve (2) electrical connectors to the HVAC actuators.
    Fig 6: Connecting Discharge Air Temperature Electrical Connector To HVAC Actuator
    G01640962Courtesy of GENERAL MOTORS CORP.
  20. Connect the air inlet electrical connector to the HVAC actuator.
  21. Connect the electrical connector (1) to the HVAC discharge air temperature sensor.
    Fig 7: Connecting Electrical Connector To HVAC Discharge Air Temperature Sensor
    G01640963Courtesy of GENERAL MOTORS CORP.
  22. Connect the electrical connectors (1) to the transfer case shift control module, located near the left side of the steering wheel support bracket.
    Fig 8: Connecting Electrical Connectors To Transfer Case Shift Control Module
    G01640964Courtesy of GENERAL MOTORS CORP.
  23. Install the bolts (1) that retain the I/P wire harness to the I/P support bracket.

    Tighten 

    Tighten the bolts to 2.5 N.m (22 lb in).

    Fig 9: Installing Instrument Panel Wire Harness Retaining Bolts
    G01640965Courtesy of GENERAL MOTORS CORP.
  24. If equipped, connect the electrical connector to the clutch pedal switch.
    Fig 10: Connecting Electrical Connector To Clutch Pedal Switch
    G01640966Courtesy of GENERAL MOTORS CORP.
  25. Connect the electrical connector (3) to the steering column.
  26. Install the steering column electrical connector bolt.

    Tighten 

    Tighten the bolt to 6 N.m (53 lb in).

  27. Connect the electrical connector to the stop lamp switch (1).
  28. Connect the electrical connector (2) to the accelerator pedal sensor.
    Fig 11: Connecting Electrical Connectors To Steering Column, Accelerator Pedal Sensor & Stop Lamp Switch
    G01640967Courtesy of GENERAL MOTORS CORP.
  29. Connect the electrical connector (2) to the floor auxiliary blower motor.
  30. Connect the electrical connectors (1) to the discharge air temperature sensors.
  31. Install the splice pack retaining bolt located at the front of the shift lever bracket.

    Tighten 

    Tighten the bolt to 10 N.m (88 lb in).

    Fig 12: Connecting Electrical Connectors To Floor Auxiliary Blower Motor & Discharge Air Temperature Sensors
    G01640968Courtesy of GENERAL MOTORS CORP.
  32. Connect the 4-way in line electrical connector located near the SDM.
  33. Connect the 10-way in line electrical connector located near the SDM.
  34. Connect the SDM electrical connectors.
  35. Connect the park brake electrical connector (2).
  36. Connect the automatic transmission shift interlock electrical connector (1).
    Fig 13: Connecting Automatic Transmission Shift Interlock Electrical Connector
    G01640969Courtesy of GENERAL MOTORS CORP.
  37. Connect the SIR electrical connector (1).
  38. Attach the rosebud that retains the theft deterrent shock sensor to the I/P support bracket, if equipped.
  39. Connect the electrical connector (2) to the passenger temperature valve.
  40. Connect the electrical connector (3) to the HVAC evaporator blower motor resister pack.
  41. Install the HVAC support bracket to the I/P substrate. Refer to INSTRUMENT PANEL (I/P) CARRIER REPLACEMENT   . 
  42. If replacing the I/P harness on a TrailBlazer, Envoy or Bravada, install the I/P harness electrical connectors to the cellular communication module. Refer to COMMUNICATION INTERFACE MODULE REPLACEMENT (TRAILBLAZER, ENVOY, BRAVADA)  or COMMUNICATION INTERFACE MODULE REPLACEMENT (TRAILBLAZER EXT, ENVOY XL)  in Cellular Communications.
    Fig 14: Connecting Electrical Connector To HVAC Evaporator Blower Motor Resister Pack & Passenger Temperature Valve
    G01640970Courtesy of GENERAL MOTORS CORP.
  43. Connect the inline body electrical connector from the body wiring harness electrical connector.
    Fig 15: Connecting Body Wiring Harness
    G01640971Courtesy of GENERAL MOTORS CORP.
  44. If replacing the I/P harness on a TrailBlazer EXT or Envoy XL, connect the two inline I/P wire harness electrical connectors to the body harness.
  45. Pass the I/P wire harnesses through the rear carpet in order to install the I/P harness to the rear electrical center.
  46. Install the rear carpet. Refer to INTERIOR TRIM  or  INTERIOR TRIM  in Interior Trim.
  47. Install the I/P harness to the rear electrical center.

    Refer to WIRING SYSTEMS (GENERAL INFORMATION)  in Wiring Systems.

  48. Install the I/P. Refer to INSTRUMENT PANEL (I/P) ASSEMBLY REPLACEMENT   . 
  49. Install the center console. Refer to CONSOLE REPLACEMENT   . 
  50. If replacing the I/P harness on a TrailBlazer, Envoy or Bravada, install the rear seat cushions.

    Refer to SEAT CUSHION REPLACEMENT - REAR NO. 1 (TRAILBLAZER, ENVOY, BRAVADA)  in Seats.

    Fig 16: Installing Instrument Panel Harness To Rear Electrical Center
    G01640972Courtesy of GENERAL MOTORS CORP.
  51. If replacing the I/P harness on TrailBlazer EXT or Envoy XL, install the second row seats. Refer to SEAT SYSTEM  in Seats
  52. Install the front seats. Refer to SEAT REPLACEMENT - FRONT BUCKET  in Seats.
  53. Enable the SIR. Refer to DISABLING & ACTIVATING AIR BAG SYSTEM .
  54. Connect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE  or BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE  in Engine Electrical.
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