Can these plugs be put i backwards andcause a no speedo and no upshift?
Can these plugs be put i backwards andcause a no speedo and no upshift?
Yes sir they can be plugged in backwards and cause the truck to not shift.
The one on the left is the only one I have hooked up. Green and purple. Due to the 241 swap. Shifts fine and accurate mph.
2013 CC 5.3
81 C10 LS1 project