Question about Pontiac Grand Prix

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I want to disable XM radio and OnStar on my 2005 Pontiac Grand Prix. Can I remove the fuse(s) for each Unit without harming my vehicle? Can I disconnect any wiring harnesses? Where do I find each Units location? Thank You for your help!

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I have disabled factory xm/onstar units from many cars with no issue. i believe the onstar/xm units are both located in the trunk of you car behind the carpet (usually labeled accordingly). If you can find the fuse dedicated to the unit you can pull that. I have found the fuse is sometimes located on the unit. If you cant find the units then you can pull out the radio and unplug them from the back (more often than not it will be the smallest harness coming out the back). A quick way to test... have your car on and pull one plug at a time... make sure, once you have located it, test you audio (some harnesses are for amplified audio systems). The only neg. effect i have seen (rarely) has been the loss of the door chime.

Posted on Apr 26, 2010

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On the bottom of the page there is a link for product support. On the next page, type "2005 Grand Prix" in the search box and hit enter. The top link shows an image and pinout on models with Monsoon sound systems, the second link for ones without.

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