Haven't seen this issue covered in my year/body style on here.
08 Gmc Sierra crew cab Slt 4x4.
I've swapped my 4L60 for a 4L80 and now have check engine light and some of my electronics don't work. ie, the prndl indicator, reverse lights, reverse tilting/parking mirrors, backup/parking sensors and the Rev limiter in park.
I read somewhere that there's an adapter /box that you can add on to remedy this but I can't find it.
Any and all help would be greatly appreciated.
Thanks!