Thread: aftermarket alarm install in a 1999 grand prix gt 4dr

Almost as comp said....85 to alarms trunk output (usually the red/white). Jump 86 and 87 with a constant 12v. And then 30 to the cars trunk release....you can disassemble the glove box and get it at the switch. I found mine behind the radio, I cant remember which wire though. I just looked for a 12v once the trunk release button in the glove box was pushed. And I believe it was, in fact, black/white. If you go with a negative trigger, you will need to ground 87 instead of powering it.