Will a plug on the trany make my truck not start or have anything to do with it? Thought the plug was wired wrong because truck wont shift right

Asked by Jul 10, 2015 at 10:42 PM about the 2000 GMC Sierra 1500

Question type: Maintenance & Repair

Wired the plug different and now it
wont start. And will the plug being
wired wrong make it not shift right?
My reverse lights are on in park. Any
help? 2000 gmc sierra 4 wheel drive

3 Answers

80,345

Yes. The neutral safety switch "thinks" the truck is in reverse now. It will not start in reverse. Do NOT try to start it in any gear but park or neutral. Otherwise the truck will lunge forward or backwards. In other words don't move the shifter and try to start it. Wire things up correctly first and your problem should be solved. HTH. -Jim

It ran before this. I figured id mess with the wires to see if i could get the reverse light to come on in reverse and not park but now the truck wont even turn over. I wired the plug back how it was and it still wont start

Any idea on what wires do what?

Your Answer:

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