Thread: 06 GP GT Head unit swap Qs

Ok planning to swap out the head unit on 06 GP GT non-bose non 6-disk non-xm

Heres the list of the things im planning to get

JVC KW-AVX820 headunit

PAC OS-2 to retain onstar and chimes - use this and the cable that comes with the head unit to get it connected.

PAC SWI-JACK for steering wheel controls.

DOUBLE-DIN Dash kit part #95-3527 metra p/n from the how-to

Other Qs
is an antenna adaptor req'd? Had to get one to connect the antenna on my 96 olds curious if its still applicable

Im not planning on putting xm in but just kinda curious

Did gm put the xm antenna in the sail thing on the roof, and if so was it and wiring to under dash included on vehicles that didn't have xm installed? If so would it be possible to wire an aftermarket xm unit to it to avoid running the ugly xm antenna.

Originally Posted by GeeBee

Ok planning to swap out the head unit on 06 GP GT non-bose non 6-disk non-xm

Heres the list of the things im planning to get

JVC KW-AVX820 headunit

PAC OS-2 to retain onstar and chimes - use this and the cable that comes with the head unit to get it connected.

PAC SWI-JACK for steering wheel controls.

DOUBLE-DIN Dash kit part #95-3527 metra p/n from the how-to

Other Qs
is an antenna adaptor req'd? Had to get one to connect the antenna on my 96 olds curious if its still applicable

Im not planning on putting xm in but just kinda curious

Did gm put the xm antenna in the sail thing on the roof, and if so was it and wiring to under dash included on vehicles that didn't have xm installed? If so would it be possible to wire an aftermarket xm unit to it to avoid running the ugly xm antenna.

first off lemme start with ur GM wiring harness. ITS OVERPRICED! I picked mine up back in 2007 from an expensive sound shop for $120, they should be even cheaper than that now days.

Next, ur radio interface is odd, i've never seen one this "universal" for cars. I mean it lists like every car ever made whats applicatable. I'm not saying it won't work, just saying this is new to me so keep me updated! more insight on that one.

and yes the "sail thing" does come on the roof and for an 06 model it should be located above the rear windshield. um I don't see why u cant get an aftermarket XM, I'm not sure what the aftermarket antennas look like but u better bet ur bottom buttons that theres an antenna for it...

for my aftermarket deck, I did not have to have an "antenna adaptor" but an extender cause the antenna line was alittle too short for me.

is that a double din JVC HU?

Yep its a double din JVC head unit.

the os-2 can be had cheaper than what the site lists, the link is to the manufacturer and they just list the suggested retail. It's a bit more than just a harness, has a box to retain factory functionality of chimes / onstar.

The radio interface - you mean the steering wheel control adaptor? Yea i used an older one on my 1996 olds when i put a jvc headunit into it. Have to program it to get it setup. I could do more explaining but its simpler to just link the install pdf for one of them.

Swi-Jack Install pdf / 2004-2008 GP Vehicle specific install

Link for all the PAC modules for 2006 grand prix They make a module for pretty much everything....

This is what imean for an antenna adaptor, sure your extension didn't do this and you didnt realize it?

You may be able to find tha harnes to instal tha deck on ebay....I paid $40 for tha one i got

A note on the PAC OS-2 Modules from the install pdf...missed this earlier "Retains door chimes when used with PAC’s optional CM1 chime module" The PAC OS-2 Product description was a bit misleading, said it retained chimes...no mention of a module.

Heres the $40 Chime module... PAC CM1 Module

The guide in the how-to list shows using the OS-4 as an option, but the grand prix isn't on the list of supported vehicles for it, also looking at the documentation on them they go to different factory harnesses...

The OS-2 Shows connecting to a 24pin and 12pin factory harness, anyone know what connectors a 2006 Grand Prix has? - Save me an hour or so of pulling it and checking just to put it back and wait a week for stuff to get here>=D.

ok, I wasnt sure on those radio interfaces and how it worked.

and Yeah that link from ZZP is about the same thing I have in my car, just one I had lying around the house though. the radio adaptors. maybe I didnt realize that it changed sizes.

um...I don't want to tell u nothing wrong on the 24/12 pin harness. since I can't remember I just took a look at my factory monsoon 6-disc xm radio and it has a 12 pin slot and 24 pin slot. sorry man I just cant remember whats what. been so long since I had that factory HU in.

and ya I know about the chimes and stuff. they are crap, my alpine is all straight wired now, no harness's. because of issues with those crappy things, I think mine was made by scosche or whatever.

good luck wid double din, u should enjoy it.

Originally Posted by offroadfury6

um...I don't want to tell u nothing wrong on the 24/12 pin harness. since I can't remember I just took a look at my factory monsoon 6-disc xm radio and it has a 12 pin slot and 24 pin slot. sorry man I just cant remember whats what. been so long since I had that factory HU in.

Thanks! that's good enough for me to say its the 24 / 12 pin connector, gonna go ahead and order the stuffs>=D

...We should think about re-evaluating this http://www.grandprixforums.net/radio_install_info.php From reading the install docs and such and compatibility things the OS-4 shouldn't fit our cars without trying to figure out a custom harness. Although installer-parts lists the OS-4 for the 2006 GP's so there is conflicting data out there...

Originally Posted by GeeBee

Thanks! that's good enough for me to say its the 24 / 12 pin connector, gonna go ahead and order the stuffs>=D

...We should think about re-evaluating this http://www.grandprixforums.net/radio_install_info.php From reading the install docs and such and compatibility things the OS-4 shouldn't fit our cars without trying to figure out a custom harness. Although installer-parts lists the OS-4 for the 2006 GP's so there is conflicting data out there...

I see what ur saying the poster of that can edit his wording. ya, if ya need a pic of the rear of my factory monsoon, just post so...its not a problem, I try to be as helpful as possible, as there's plenty of stuff I don't know crap about and hope for future ppl help me with my issues...lol u must do alot of online shopping, sometimes I go that route...

Update - started getting the harness together

The SWI-JACK module req's connection to Pin A6 and A7 being wired to accessory.

The Factory to OS-2 Module harness didn't include A6-A7(and some others), So I bought a second GM-24 Connector to steal pins / wires from to avoid cutting into the harness and making it nice and easy to plug in no hassle

I'll be pulling it into the garage in the next couple of days to do the install...if all goes well ill take some pics of me harness work and write up a how-to for it.

Curious as to how i'm going to fit the OS-2, SWI-JACK, and CM1 Little black boxes into the Dash with the double din unit

^^^ you'll cram it in there somehow, keep updated

Yea my oldsmobile was a tight fit, had to shove the SWI-JACK module on top of the radio kinda with the short harness making it hard to get stuff situated during the finagling.

That and my headunit has a USB connection on a dongle from the back that im going to try to run into the console...the wire on it is long enough just a matter of the routing...Love memory sticks...skipping and jumping isnt even an issue....that pioneer DVD double din headunit that has a built in 6 disc changer is even more rediculious cause ill rarely be using discs anyway o.0

Heh the guy at best buy tried to tell me to wire the PAC-JACK directly to the wire coming off the steering wheel cause the resistance in the wire from there to the factory may mess it up. Could stick an ohm meter across 6-7 and see what the resistances come out to - pretty sure the resistances will be split far enough that your wire would have to be very bad to throw it that far out of tolerance and wouldnt even function with the factory head unit...

ok tis all done and working>=D I got in a bit of a rush and skipped taking pics of the harness.

List of things used
PAC OS-2
PAC CM1
PAC SWI-JACK
Antenna adaptor
04-08 Grand prix Double Din in stall kit
GM24 Factory - Stereo Plug to Steal 2 Wires for A6 and A7 for SWI-JACK to the PAC-OS2 Factory GM24 Harness
JVC AVX820

For the Wiring of the Factory Harness to OS-2 put 2 stolen pin / wires from other harness in A6 and A7. A7 is connected to the GREEN wire of the SWI-JACK. A6 is connected to the Yellow Constant Power wire(think A1).

i added the following to the splices between the PAC-OS2 - Stereo Harness to avoid using in line splice connectors.

SWI-JACK Ground to Ground through OS-2
CM1 to same Ground splice
SWI-JACK Power to Red switched accessory provided by the OS-2 harness / Relay.
CM1 yellow constant power to Yellow constant power....doesnt matter where, just wherever's convienent.
CM1 Orange plugs into the harness on the radio side of the OS-2 per instructions.

I didn't like grounding the radio to the harness through the smaller wires of the OS-2. There is a bolt that is a good ground directly behind the stereo. I put a connector on the end of the ground so It could be placed under the washer of the bolt. The bolt was painted so i used a wire brush attachment on the dremel to make the contact points shiny.

Since mine is a DVD unit it requires being wired to the parking brake sensor to play dvd's - this was wired directly to ground of the OS-2 / Radio harness. Verified playing of DVDs while stopped, but i dont think its smart enough to know if its moving.

Unit has a USB connection from the back with a long cord - i routed it down towards the passenger side and out and will later see if i can run it under and into the console storage.

I forgot to plug the mic into the back of the headunit until after i had it all done. Will have to play with that later o.0

Other thoughts Test fitted moving the HVAC controls down into the storage position and removing the storage pod. the wires were a bit short to move the HVAC controls down tho. Reason for wanting to do this is making a gauge cluster to mount where the HVAC controls are since they dont need high visability and the gauges do.

CM1 Module is bloody loud - need to see if theres volume control in the DIC
Verified onstar works - OS-2 only mutes front speakers tho, even when wired to brown wire of the head unit - possibly something wrong there was under the impression the OS-2 would send a mute signal across the brown wire to the mute input of the stereo causing it to mute for the call.
And everything fit in the little bit of space above / below the stereo....barely. Had to cut some material off the install kit's lower piece to allow access to the button for removing the faceplate.
Also first car ive had with a removeable face plate - that seems like its going to get old quick o.0.

wow u confused the hell outta me with all this A1, OS, Module, and CM1 crap. blown out of my mind. So I guess I'm saying, does everything work ok?

Ha, yes everything works. Was trying to get the techie details braindumped while it was still fresh.

Possible issue
It only mutes the front speakers for onstar which i need to do some more fiddling with. So if you have the radio loud and use onstar the rear speakers need to be manually muted. Theres a Tel mute wire running to the head unit from the OS-2 which i thought would mute the whole system but i dunno - need to do some more reading on that>=D