Thread: adding Nav to a GXP

Bought a used nav unit from another gxp to put in my 2008 GXP. Both came with XM radio.. I pulled my radio cdplayer out and it only had 2 wiring plugs going into it.
The navigation unit had the same 2 plugs then 2 more plugs, 1 grey plug with only one black wire coming out of it, the other plug has 2 pink wires and a white plug...
I dont have any other wiring behind my radio for the nav to work. Ive called the dealer and said you cant get any other wiring for the car. True or false? ive looked at tons of diagrams on GMpartsdirect but it doesnt show part numbers.


edit
Found some links for people if you need help..

http://ls1tech.com/forums/ls4-performance/1508019-factory-nav-experts-step-inside-please.html
http://www.clubgp.com/newforum/tm.as...key=&language=
http://www.clubgp.com/newforum/tm.as...de=&s=#3461585
http://www.clubgp.com/newforum/tm.as...de=&s=#3779365
http://www.clubgp.com/newforum/tm.as...mode=1&smode=1

i still cant find the GPS antenna part number or anything like that

Where did you find your nav radio?

Sent from my Samsung Galaxy Note II

let see here, i found mine in the car when i bought it, one of the few to have it stock.

Yeah I had more issues when I went to get my fobs programmed, the reciever was junk so I'm gonna just install Alarm.

The white plug with the 2 pink wires is for the Voice Command, thoes 2 wires go to the onstar module, The other grey plug is for the Nav Antenna

Most ppl tap the CSS at the strut tower location

Originally Posted by gilroy222

Are the corvette Navs identical to the pontiac ones? and do you lose the date in the DIC like you would with an aftermarket deck?

Yes they are the same unit. I was told the symbol at start up will display a vette logo instead of a Pontiac one. No you won't loose the date in the DIC.

Sent from my Samsung Galaxy Note II

Only thing that's diff that I want is the Bluetooth. Believe that is in the on star box thoug.

well o damn lol i could be wrong, but i dont remebr ever seeig a write up for a corvette nav in a impala

yeah sorry about that, got to realize i have a real GXP nav from factory.
Here is what i found: The VSS is on the blue 56-pin connector at the PCM, VSS is on pin 22, dark
green wire, bottom left is pin 1, left of row 2 is pin 14, 8 pins over from
leftmost pin on the second row.

with that info it should be easy to find,

dont know if this will help at all