Where is the reverse light switch for 1995 gmc sierra located?

Question edited for clarity.

I don't know. It is definitely there. Check out the vidoes and click the images tab, second image.

https://www.google.com/search?q=1995+gmc+sierra+5.7+crankshaft+position+sensor+location

..

see notes

could be the reverse planetary gear, which also runs 2nd and 4th gears.

Put you a couple of more body grounds on it if that helps From the Block to the fender and from the frame to the body

The brake switch should be mounted under the dash, usually attached to a bracket so that the switch contacts the brake pedal lever.

brake light switch is bad

Check fuses first. If thats OK, could be a problem with the brake switch (down by the pedal) or the wiring.

If you have tilt stearing, lower the stearing wheel. Carefully remove the dash trim around the instrument panel and radio a/c controls. Unplug the headlight and truck bed light switches. Lay the trim panel aside. On the side of the control module gently slide a flat screwdriver in the slot until the clip disengages. (Look at the new one to see which way the clips face.) Repeat on other side. Disconnect wire harness plugs. Assembly for the new module is the reverse of the above. Be careful to use gentle pressure on the dash trim or it may break.

rebuild gearbox bruv its knackered

just unplug and unscrew its threaded like a bolt