I'm sure it can be done with the rear-view mirror with the onstar setup...it's just a matter of extending the wires and soldering. This could be time consuming if you don't have any experience doing this type of work so you may want to have a car audio shop do it for you.
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2003 Hummer H2 LUX...sold
2006 Hummer H2 SUT LUX...sold
2018 Polaris GEM e4
2022 Can-Am Maverick X3 XRS Turbo RR
2024 Rivian R1S Adventure
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