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My Dixie Wrecked
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5,510 Posts
I'd imagine the blue and yellow are the Onstar and the XM is the black one.
 

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502 Posts
what year is your truck? the onstar module sits under your radio( can see it from under if u stick your head under it) unplug the 2 connectors and 2 antenna wires and you have to jump the tan/black wires from each connector and then jump the tan wires from each connector. those are lan wires so you just need to close the loop and leave them unplugged.

if its an 07 to early 08 u can just pull the fuse marked "info" under the hood iirc..
 

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GMFS Member
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259 Posts
The shark fins pick up am/fm?
The am/fm antenna is mounted on the front right side fender, the one on the roof is only for XM/Onstar.
 
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