factory alarm

I am trying to install an aftermarket alarm/remote starter in my 98 gtp ive looked at several wiring diagrams and tested the wires they dont seem to match up i need to know what wires arm and disarm the factory alarm...

Where are you getting your info? It is one of the easiest newer cars to mess with. The disarm wire is orange/black in the DKP 32 pin plug location 5. It automatically arms when you lock it. If you need more, email me. Also, curious what you are installing exactly.

i figured out thoese wires i thought if i disarmed it the dome light would turn on and the doors would unlock also but i guess not i am installing a black widow 2way pager alarm / remote start... i heard somethin about haveing to test the resistance of the ignition key???

yes, you have the VATS system so you need to pay very close attention to what you do on that. If not, the car will not start, not even with the keys!

what is vats?? is it like passkey??

Yes, (Vehical AntiTheft System). It is the little black chip in the body of the ignition key. Not all cars have them. The true Passkey system is mostly on the newer cars although some started in late '97 cavaliers, sunfires and simular platforms. They have progressed to "same but different" systems now. Like my '01 Silverado has PK2 system while the new '05 Grand Prix, big Caddys(excluding Escalade), and other lines have PK3 systems on them now none of which have any sort of "chip" in the key that you can see. In fact, the PK1 and PK2 do not use special keys but the PK3 systems do.

The below link may also help you out with verifying the wires.

~Larry~

http://mywebpages.comcast.net/alitaki/GrandPrix/security.html#1

Ive been searching and i cant seem to find any information on it someone said in another post that the 1998 gtp didnt have any system in it how can i tell if it has one of these systems (there is nothing etched into my key)

Yes, in '98, the GP didn't come with any sort of imobolizer.