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While my motor is out of the car, I plan on finally having reverse lights from my 5 speed swap.

Does anyone have the factory service manual for this model year and can tell me on the automatic plug which wires trigger the reverse lights?

I don't have it with me but I have a 3t40 guide at home that will show which wire on the switch is used for the reverse.

perfection! please let me know when you can!

Autozone.com has repair manuals/diagrams ect they might have one also, you have to make an account though.

this is actually a really good diagram to have but its not labeled on this

They have all been green/blue on the GMs I've worked on from that era.

I see this as light green... Pin F. There is a dark blue listed but that goes back to the fuse box.

Yeah, it's an ign switched 12v blue wire to the backup switch, and green from the switch to the lights.