Stuck Switch

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

The sunroof system has a sunroof stuck switch feature that will allow a closing due to one of the sunroof switch signal circuits being shorted to ground or a faulty sunroof switch. If either the sunroof switch open, open vent or express signal circuits should become grounded, that sunroof signal circuit will input a low signal to the sunroof module. This will drive the sunroof window to the requested position. If the same signal circuit continues to remain low, as if a stuck sunroof switch or a short to ground, the sunroof module will ignore any other input request for 1 minute. After 1 minute, a request to close the sunroof window will be granted once the sunroof switch is pressed to the close position. The sunroof system will become inoperative once in the close position, until the ignition is cycled back on.