To start, I have a 2002 2500hd 6.0 4l80e 4x4.
i can't shift down to 1 on the lever. I've been messing with it for over a week, still no luck.
so far I've changed the shift cable, shift control mechanism on the column, and the arm that attached to the trans. None of these solved anything.
my next step is to change out the black box the arm attaches to on the trans, I believe it's called the safety neutral switch.
Does anybody have any insight for me?