Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Positioning Radio Extension Cable To IP Support Bars
    GM718022Courtesy of GENERAL MOTORS CORP.
  1. Position the radio extension cable to the IP support bars as previously noted.
  2. Reach through the IP compartment to connect the antenna cable to the radio.
  3. Install the radio extension cable attachments (1) to the IP support bars.
  4. Fig 2: View Of Radio Antenna Cable To Radio Extension Cable
    GM734416Courtesy of GENERAL MOTORS CORP.
  5. Connect the antenna cable (2) to the radio extension cable.
  6. Install the inflatable restraint module. Refer to Inflatable Restraint Instrument Panel Module Replacement in SIR.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.