GM Service Manual Online
For 1990-2009 cars only

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

DTC Descriptor

DTC B2462 00: Global Positioning System Sensor Receiver Failure

DTC B2462 08: Global Positioning System Sensor Signal Invalid

Circuit Description

The navigation antenna is connected to the navigation module with a coax cable. The navigation module polls the data from the navigation antenna once every second.

Conditions for Running the DTC

    • The ignition ON
    •  The system voltage is at least 9.5 volts and no more than 15.5 volts.

Conditions for Setting the DTC

    • GPS antenna output above threshold.
    • General GPS receiver error during test.

Conditions for Clearing the DTC

    • The navigation module detects a proper signal from the GPS antenna.
    • A history DTC clears after 50 fault-free ignition cycles.

Reference Information

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Navigation System Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Circuit/System Testing

  1. Ignition OFF, disconnect the GPS coaxial cable from the navigation module.
  2. Ignition ON, test for 4-5.5 volts between the center conductor and the shield of the coaxial cable.
  3. ⇒If not within the specified range, replace the navigation module.
  4. If all circuits test normal, replace the GPS antenna.

Repair Instructions

Perform the Diagnostic Repair Verification.

    •  Electronic Navigation Antenna Replacement
    •  Control Module References for navigation module replacement, setup, and programming.