OnStar / B2476 04

Read the instructions below then start the fault diagnostic procedure.

Symptom: Not possible to call OnStar Call Center (OCC).

B2476 04

Fault symptom

Not possible to call OnStar Call Center (OCC).

On-board diagnosis

Enable criteria:

Continuous

Fault criteria:

Open circuit in power supply/grounding to keypad.

Checking the wiring harness

Jiggle the wiring harness at several points to detect intermittent breaks or short circuits. Check also the connector for oxidation or loose pins.

Diagnostic help

Electrical fault in connecting leads or component.