I got my windows tinted the other day, but the douche didn't put my antennae back on the window!!!!!! Is this the ONstar antennae or something else?

its only for ONStar.....if you dont have it, then dont worry about it

If it is the coupler on the inside hanging down all you need is some 3M double sided foam tape to reattach the coupler to the window tint.

GM specifically warns that these need to be replaced when removed. The adhesive they use is an integral part of the design. Changing the thickness and/or density will affect how they work because they are capacitively coupled components.

I did not know that. I used 3M tape on mine after my window was tinted with no problems.

Two questions:
1. Do you need to replace the inside coupler or just the grey tape holdiong itto the window?

2. When you upgrade to the new Digital OnStar is the coupler replaced at that time?

It won't render the antenna completely useless but can certainly impede designed performance/specs. The glass acts as a dielectric barrier in this case and will change the circuit due to the change in capacitance. It'* likely the tint film is have some effect as well.

They replace the entire coupler. The adhesive tape is applied at the time of manufacture. There is no good way to separate the original material from the coupler housing without causing some degree of damage. Anytime RF is involved, small or insignificant changes may not be small or insignificant.

Yes. In fact both the coupler and the antenna are replaced. Had I been thinking ahead a little more, I would have just upgraded to the roof mount antenna at that time. Instead, there was a transition step when they changed the glass mount antenna. There was a defrost line damaged during this process that I had to repair.

ddalder
THX for the replies and clarifications. I upgraded to digital so any problem I might have caused was fixed.

I too was worried about the thickness of the 3M tape but I had a piece that was less dense and used that one.