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 MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 693 (CELLULAR COMMUNICATION SYSTEM)REPAIR INSTRUCTIONSCOUPLING REPLACEMENT - ANTENNA INNERREMOVAL PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic
Removal Procedure
1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal 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.
Important:
- Use adhesion promoter to ensure adequate bonding of the coupling.
- To obtain maximum adhesion between the new mobile antenna couplings and the glass surface, the couplings and the glass must be kept dry and above 15°C (60°F) during installation. Allow 6 to 8 hours, at 15°C (60°F), for the adhesive to cure after installation. Otherwise, the new couplings may not adhere.
- Do not attempt to reinstall the original cellular antenna exterior coupling or inner coupling using any type of glue, adhesive tapes, etc. Doing so may eliminate the cellular signal transfer through the glass and reduce the maximum performance of the system, including the air bag deployment notification.
- Disconnect the coaxial cable from the mobile communication antenna inner coupling.NOTE: If you use a razor blade or other sharp tool in order to remove the adhesives or foreign objects from the inside of the rear window, use the blade carefully. Damage to the grid lines may result.
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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.