Your 1996 GMC Sierra truck might not go in reverse because the Transmission Fluid is empty. You might also have damaged the transmission or the transmission linkage could be broken.
what to do if my reverse lights on my 1993 gmc 1500 truck wont work
Take it out of reverse.
pres the brake until it moves
Shift linkage may need to be adjusted?
You are probably low on transmission fluids
Frozen/seized clutch pack, time for a rebuild.
You may have burnt out bulbs, blown fuse or malfunctioning brake switch. Same on any car.
most likely cause is the timing is advanced too much and isnt shutting off properly
cuz it wont silly!
cuz she a rachet hoe who wont leave me alone
the truck driver wont be there at the start but will be there later
it will drive but when in reverse it wont move