Quote Originally Posted by lovinmydodge View Post
y is it so much? mine was 50 and it had to store extra power for a false remote power source that is trans from the key signal processor.... I've never seen a wiring harness that was over 65 bucks that wasn't for something like an exotic car... and yours is for a cavi...
For GM vehicles that have On-Star, you need interfaces...not just a harness. This is because On-Star and all the warning chimes also utilizes the speakers. So simply adding a harness will not allow those features to function. So you will need the interfaces to allows everything to work. GMOS (Axxess/Metra) interfaces range from $60 and up based on which one it is. The most expensive one I have is $95 for the GMOS-01.