Radio Wire Harness

**grampete** · 03-24-2015

Hi all!

I joined this forum today just so I could ask this question. I've been searching the internet for a while and haven't found anything so hopefully you guys can help.

I am wanting to install a new head unit (pioneer) in my 2008 Grand Prix. I have steering wheel controls, but no OnStar or Monsoon system. I've been searching high and low for a wire harness adapter to keep the factory wire harness in tact. Most of what I find is about $80 worth of an adapter for OnStar, which I don't need! Buttt..... I have found a couple kits on eBay.

Both these kits have dash mounting kits and antenna adapters included.
One kit has a simple wire harness adapter that only supports the audio coming from the radio. No warning chimes, no OnStar, no BS. $20
The other kit has a simple wire harness adapter AND an interface for warning chimes. Again, no OnStar. $60

So my biggest question is, what warning chimes run through the radio? Just OnStar chimes or everything? Because if the chimes aren't a big deal, Ill go with the cheaper unit. But if "warning chimes" means door, seatbelt, CEL chimes, etc., then ill get the more expensive one (because I want those features).

Can anyone shed some light on this situation for me? Sorry for the long post, I just don't know what else to do! Any help is appreciated!

**Scottydoggs** · 03-24-2015

theres a adapter sold at crutchfields some one will pop in with the name and part #.

but the moonson deal there, you'll need to run new speaker wires and install all new speakers, forget the factory amp too. its best to just by pass all the old crap. the speakers are a different ohm, so when you hook up the new hu to them the sound is far from right.

**grampete** · 03-24-2015

Originally Posted by Scottydoggs

but the moonson deal there, you'll need to run new speaker wires and install all new speakers, forget the factory amp too. its best to just by pass all the old crap. the speakers are a different ohm, so when you hook up the new hu to them the sound is far from right.

I don't have the monsoon so that won't be an issue. I'm not doing new speakers either. Just want a new head unit for Bluetooth reasons.

**Scottydoggs** · 03-24-2015

oh, i miss read once again lol i suck.......

best buy should have a pig tail that fits into the factory radio plug, the wires on this plug are all labeled what they are for. makes hooking up a new hu easy. and saves the factory harness so you can go back to the stock radio if you ever wanted to.

**grampete** · 03-24-2015

Originally Posted by Scottydoggs

best buy should have a pig tail that fits into the factory radio plug, the wires on this plug are all labeled what they are for. makes hooking up a new hu easy. and saves the factory harness so you can go back to the stock radio if you ever wanted to.

Will the one from best buy still retain the OnStar and warning chimes, and cost me a fortune? Or will it just be like any normal radio harness? Because that's what im looking for. I don't need all the fancy interface connections.

**Scottydoggs** · 03-24-2015

the pug is just for the power and speaker wires.

you'll need that adapter to keep all the chimes and steering wheel controls. if i knew the part # id tell ya. t theres guys who know more on that part. ive just seen it linked a 100 times in the past.

**grampete** · 03-24-2015

Originally Posted by Scottydoggs

you'll need that adapter to keep all the chimes and steering wheel controls.

Do all the chimes run through the speakers? Like key, warning lights, seat belt, etc?

**Scottydoggs** · 03-24-2015

no idea where they come from, i do know a lot of stuff stops working when the factory radio is removed. the adapter fixes that.

**grampete** · 03-24-2015

Thanks for the help!

**ibra0078** · 03-25-2015

When I did my radio install last year in my GP 2008, I got the expensive harness as all warnings/chimp go through your speakers.

**industrialfish** · 03-25-2015

Originally Posted by grampete

Do all the chimes run through the speakers? Like key, warning lights, seat belt, etc?

Yes.

**simbah** · 03-25-2015

the harness required for the non Monsoon radio is the GMOS-01. You will also need another adapter for the steering wheel controls to function properly. Yes all chimes will be lost with cheap harness. Seat belts, door open key in ignition and all DIC warnings. SO if you want to keep the chimes then you will need the more expensive harness. On a side note you will lose the date function on the DIC, no way around it as the date is kept by the stock radio.

**grampete** · 03-27-2015

Originally Posted by simbah

the harness required for the non Monsoon radio is the GMOS-01. You will also need another adapter for the steering wheel controls to function properly. Yes all chimes will be lost with cheap harness. Seat belts, door open key in ignition and all DIC warnings. SO if you want to keep the chimes then you will need the more expensive harness. On a side note you will lose the date function on the DIC, no way around it as the date is kept by the stock radio.

So no matter what harness I get, the date on the dash won't work?

**simbah** · 03-27-2015

That is correct sir.

**ibra0078** · 03-27-2015

Trust me I thought I would miss the date on thr dash but I don't

**grampete** · 03-27-2015

Originally Posted by ibra0078

Trust me I thought I would miss the date on thr dash but I don't

will everything else on the info center still work? like temp, compass, tire press, trip, blah blah blah? everything but the date and time?

**ibra0078** · 03-27-2015

That is correct, what radio you putting in?

**grampete** · 03-27-2015

Originally Posted by ibra0078

That is correct, what radio you putting in?

Thinking about a Pioneer FHX720BT. I have also looked at comparable units from Kenwood and JVC. Any recommendations? I am shooting for a factory (or at least as factory as possible) look. Looking to stay under $150.

**ibra0078** · 03-27-2015

I put in a avic x930bt in my other car and in my Grand prix believe it or not I put in this http://pages.ebay.com/link/?nav=item...640875&alt=web, it works really well and I didn't want to spend a lot on a HU but I wanted a navigation system. This system does more then my avic and if I would of bought a brand name with the same specs it would cost over 800 for sure.

**JasonandStacys04** · 03-27-2015

When the orginal CD unit went tits up on a 100F summer day. I upgraded to a Pioneer AVIC-D3 in 2007. Still going strong today, got us out of jams in large cities like DC, Philthydelphia, and Pittsburgh. Well worth the $550 unit cost and $200 adapters and install cost. Everything works except for the date display in the center display. Guess there was no way to hook it back up, as there is currently an empty plug that used the original's clock to keep track of the date.