LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2012 >> Chevy Express H1500, Van Cargo >> Repair and Diagnosis >> External Pages >> Different car >> Section 1921 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B2462 (Communication Interface Module) >> Circuit/System Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Testing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2011 GMC Savana Special, 2011 GMC Savana Camper Special, 2011 GMC Savana, 2011 Chevrolet RV Cutaway, and 2011 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the GPS and cell coax cable connector at the vehicle communication interface module.
  2. Using the EL-49903-5 adapter with EL-49903-4 coax cable, connect the EL-49903  to the vehicle communication interface module, place the test antenna on the roof of the vehicle.
  3. Ignition ON, wait 5 minutes, then contact the OnStar call center consultant by pressing the blue OnStar button. A call center consultant should answer the call, ask the consultant to verify the vehicle location to confirm the GPS system is functioning.
    • If the OnStar GPS does not function, replace the vehicle communication interface module.
  4. Ignition OFF, perform the coax cable test on the coax cable, refer to Component Testing . The coax cable should pass the test.
    • If the coax cable does not pass the test, replace the coax cable.
  5. If all circuits test normal, replace the cellular and digital radio antenna.
scientia non olet · About LEMON Manuals