Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1248 (ENTERTAINMENT SYSTEM)REPAIR INSTRUCTIONSANTENNA EXTENSION CABLE REPLACEMENT (IP)INSTALLATION PROCEDURE

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

Install the antenna extension cable as noted before removal.
Important: Ensure that the cable is secured to the harness at least every 150 mm (6 in) to aid in protecting and routing the cable.
Use electrical tape in order to secure the extension cable along the outside of the wiring harness.

Fig 1: Installing Antenna Extension Cable
Courtesy of GENERAL MOTORS CORP.
Connect the IP antenna extension cable to the body harness antenna extension cable along the front door hinge pillar.
Connect the IP antenna extension cable to the radio. Install the radio. Refer to RADIO REPLACEMENT .
Install the instrument panel (IP) compartment. Refer to COMPARTMENT REPLACEMENT - INSTRUMENT PANEL (I/P) in Instrument Panel, Gages and Console
Install the right IP insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - RIGHT in Instrument Panel, Gages and Console.
Install the right carpet.
Install the right carpet retainer. Refer to CARPET RETAINER REPLACEMENT - FRONT in Interior Trim.

Fig 2: Connecting Instrument Panel Antenna Extension Cable To Body Harness Antenna Extension Cable
Courtesy of GENERAL MOTORS CORP.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

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

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