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Does anyone know or can provide any feedback about this product? I drive a 2005 GMC yukon with onstar and I see that now installling my Z1 is going to be a little more involved than needed. I was told that i need to buy a harness that comes from my truck to the unit that will enable me to still retain my door chimes and my ONSTAR in my truck... I saw that PAC makes a unit that can solve this problem, and then i came across this product? I just want to be sure that this will solve the issue because the installers are charging 100 + fir this harness in addition to some antenna device i need and then installation of the radio..... THANKS ANYONE WHO CAN HELP ASAP!!!

I registered just to answer your question....basically you don't want that wire harness either. With that harness you have to have the black box that goes with it that retains your door chime. I have a impala and I've had that harness before. I actually got another harness

this one - Product Image Metra Electronics Corp. GMRC-02 and get an antenna adapter

You need a GMOS-04. The link you posted is for non amplified systems, and a Yukon will have a factory amp. The GMRC-02 will only take care of chimes.

Thanks sirs for your replies...

My yukon does not have an amplified system because i dont have bose and i dont drive a denali... But thanks for your help...

And i was told that the GMOS01 is correct by another source because of the year of my vechicle.. but i am going to contact the company directly and see what they say and i will come back with info.

Thanks for all your help...

Per Crutchfield info....

for my vehicle- its the 01... thanks for your help though sirs!!!

I installed the GMOS01-LAN in a Saturn Outlook 2009. It works well. We had to adjust the volume levels for the OnStar and the Chimes but now it's Ok.

You need to buy a relay for the turn signal sound unless you don't want to hear it anymore.

The factory radio did more that play CDs.

I have the amp & onstar in my car...if you use the lil blackbox you will retain all that...if you don't(which) i did...you won't....trust me I've had both in my car..

Hey guys... I went with the Pac system, per recommendations of my installer so im returning that one...

Thanks though.