Having problems with your 2003 Chevrolet TrailBlazer ?
No gps signal allowed when truck on
\015 When i turn on my trailblazer i lose all signal to my gps. i have tried an external antenna but the problem persists.\015
One other thing to check would be to see if the Onstar, has it's own fuse by chance & if yes, remove it & try yur GPS after.
Repair Help & Product Troubleshooting for 2003 Chevrolet TrailBlazer
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