[65blackfleetside]

I used the stock GM switch that was on my 4L60E for both reverse lights and neutral safety switch. you can picked them up new relatively cheap too. try rock auto. i purchased a plug for this switch with pig tail i think from rock auto? Install it over the shaft with 2 bolts and pin it out . There are 2 different style plugs and wire diagrams so make sure you get the correct one for your switch. There are about 10 wires on the switch most of those illuminate the P-R-N-D-4-3-2-1 indicators. you wont use those. You will just use the ground. and the hot wire when in " P" and the hot wire when in "R" - Very simple.

If I remember correctly- the after market type switches only allow 1 or the other function not both like the OEM. Good luck