gmc sierra reverse light problem

I am giving you the wiring diagram for the backup light circuit.

do you happen to have a schematic for the neutral safety switch. do you also happen to know why the truck is doing this?

The backup switch circuit is pretty simple and isolated. I would look at the ground and make sure it is a good metal to metal corrosion free fit.
I am attaching the neuatral switch diagram.

I will be happy to donate more money but would you be willing to send a better schematic of the neutral safety switch. When i enlarged it, it was very blurry and I couldn't make out what was what. Do you have a better image? My apologies for my inadequate computer skills.
Thank you!

It is not your inadequate computer skills. Sometimes the images just don't come out well and sometimes they are crystal clear. I am sending you a new one using another program that is more complicated, on my end but will be the same for you, and usually puts out better pics. Otherwise, if it comes down to it I can e mail you the pic, that should take care of it.
I actually ended up splitting the diagram into 2 pices as well. 1of2 is the top and 2 of 2 is the bottom.

I had this same problem on my 2000 GMC Sierra stepside and I could only get power to my passenger side rear lights and no power to the right rear lights after much confusion and chasing 12v with a meter and a test light! I traced all the problems back to the rear buss block where all the lights are wired into so I went to the local junkyard and picked 3 of them up for 11 dollars each and I replaced it and voila everything is back working. Hope this helps anyone with the same problem

Thanks for sharing! We hope this can help someone with a similar problem.Thanks for using 2CarPros.
Danny-