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 690 (ENTERTAINMENT SYSTEM)REPAIR INSTRUCTIONSANTENNA CABLE REPLACEMENTINSTALLATION 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 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

Install the coaxial cable harness to the roof beams with the rosebud clips (3).
Connect the power lead connectors (2).

Fig 1: Installing Coaxial Cable Harness
Courtesy of GENERAL MOTORS CORP.
Install the antenna connection (2) at the windshield.
Connect the ground connector (1) to the roof beam.

Fig 2: Connecting Coaxial Cable From Antenna Module
Courtesy of GENERAL MOTORS CORP.
Connect the coaxial cable connectors (2).

Fig 3: Connecting Coaxial Cable Connectors
Courtesy of GENERAL MOTORS CORP.
Install the coaxial cable connections to the antenna module.
Install the upper instrument panel trim pad. Refer to TRIM PAD REPLACEMENT -- IP UPPER .
Install the headliner. Refer to HEADLINER REPLACEMENT (WITH SUNROOF) or HEADLINER REPLACEMENT (WITHOUT SUNROOF) .
Install the upper rear quarter trim panel. Refer to TRIM PANEL REPLACEMENT -- REAR QUARTER UPPER .
Install the right side windshield garnish molding. Refer to GARNISH MOLDING REPLACEMENT -- WINDSHIELD PILLAR .

Fig 4: Connecting Coaxial Cable To Antenna Module
Courtesy of GENERAL MOTORS CORP.

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:

• 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.