i have a 07 silverado ltz with xm radio installed by the factory.
i would like to know if anyone knows how to access the xm antenna so i can use my portable xm roady xt, i do not want to put the magnetic antenna on the roof, i want to use the antenna already on the roof.any suggestions? thanks

 

in order to access that antenna you would have to drop the headliner, the wiring runs behind that.

 

If you have a new style truck, the xm reciever is above a plastic hush panel above passengers feet. If it is a classic style, it is directly behind the glove box.

either way the reciever will be a small steel box, with a puke green connector that is the antenna lead

 

thanks shawnvw, i will try to find it, i have the new model, should be easy i guess.