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If a connection is not made within specified time, go to Component Testing. 5. Hear all messages during the course of the tests available, and contact the General Motors Technical Assistance Center. Component Testing 1. Verify that there is no exterior damage to the cellular antenna. If damaged, test or replace the cellular antenna assembly. 2. Disconnect the cellular antenna coax from the VCIM. 3. Disconnect the cellular antenna coax from the cellular antenna. 4. Test for infinite resistance between the center conductor of the coax and the outer metal shield. If different than specified value, replace the cellular antenna coax. 5. Test for less than 1 ohm resistance at the cellular antenna coax center conductor from end to end. If greater than specified value, replace the cellular antenna coax cable. 6. Contact the General Motors Technical Assistance Center. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Mobile Telephone Digital Antenna Replacement VIDEO DISPLAY IS POOR OR BLANK Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. Reference Information Schematic Reference IMPORTANT: Vehicle may be equipped with sectioned coax. Test each section and replace only the faulty section, not the entire length or coax.
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Cellular, Entertainment, and Navigation - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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