Probably would be a better environmental place to have sender ground. Maybe was not accessable, at assy sequence, to install? Just a guess, I don't have any AD's to look at.
Chevy did not delineate that wire on the wiring diagram like they should have if there was a factory wire for ground. They just show a "chassis" ground symbol like all the other components that use intimate contact/touching ground. The only place they show a dedicated wire is at the headlights. To a ground stud. Kevin and Carl do indicate/show a factory jumper wire to ground from sender flange.
(At neg post of battery the don't show a cable but that is obvious).
Chevy and GMC started to show a wire in 60.
No big deal just picky stuff. I have found lots of poor diagram drafting/old convention. The big one, in a diagram, is a curve/half loop as a wire passes over another.
Last edited by bartamos; 02/17/2025 1:40 AM. Reason: clarification