Thread: 06 Grand Prix Manual 5 speed need to bypass park/neutral safety switch

I bypassed it on my drag car because I had a bad switch and I wanted to get it running. My car is a 2001, and I can't remember the difference that the 04+ cars have.

The large purple wire on the starter traces back to the transmission. You need to find the wire going into the transmission from the ignition... it'll be a big 10 gauge wire. Everything else will be much smaller.

Just jump those two wires and you'll be set.

Besides the speed sensor wires, there is one group of wires going to the big plug on the top back of the transmission. All of which are small gauge wires, all the same. The wires you speak of go to the transmission range sensor on the 03 and older Grand Prix's, and they don’t use that in the 04 newer cars. Hence the need for a diagram. I still might grab that purple wire from the starter and follow it, it’s a bigger gauge wire for sure than any wire going to the trans.

Yeah I would follow that wire and see where it goes. If it's not going to the transmission, there must be an external nss someplace. Make sure you post up what you find.

Is there any risk of harming the PCM by individually grounding each of those wires and trying to start it each time?

I’m trying to upload some schematics I got from a friend at a dealership and ran out of space or something so that I could only upload one so far, maybe someone smarter than me on here can use the schematics to help me figure out how to bypass the switch