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Home >> GMC >> 2007 >> Envoy 4.2 S, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 607 (Cellular System, Entertainment System & Navigation System) >> Diagnostic Information and Procedures >> No Global Positioning System (GPS) Reception >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the GPS antenna coax cable from the navigation radio.
  2. Ignition ON, test for 4.5-5.5 volts between the coax cable connection center conductor at the radio and ground.
    • If not within the specified range, replace the radio.
  3. If all circuits test normal, replace the GPS antenna.
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