For 1990-2009 cars

The OnStar Communication Interface Module (CIM) monitors the Remote Control 3-Button Mirror Assembly for stuck buttons.

### DTC Parameters

• | Any one button is depressed for 15 seconds.

• | This test runs every 300 ms.

• | Illuminate the Red OnStar telltale.

### Diagnostic Aids

If the condition is suspected to be intermittent, initiate multiple button presses in order to duplicate the condition.