I just bought a Kenwood DNX-8120 in dash navigation unitand im planning to have it installed this weekend. My question is will the Metra GMOS-04 work to retain Onstar and door chime? I have searched ih the forums and it seems like there are mixed success with this harness on the 06 H3. Is there anyone who have used this successfully on the 07 H3 with monsoon? thanks

 

I used the GMOS-04 when I installed my Pioneer AVIC-D3 navigation system. This harness is the easiest to install since it has everything on the single harness, including +12V ignition power, OnStar, chimes, even the leads needed for a GPS like parking brake, reverse signal and speed pulse. You can also retain the fader in the after market unit. Some people complained about alternator noise, but this is remedied by turning down the input level on the harness itself.

You can see my harness here: LINKY

 

thanks for the info. now i can have this installed this weekend without any worries.