I'm convinced the LT1 section is the best on LS1tech, lol. I had this question in the electronics section with no luck so I'll post up here.

I have an Autometer trans temp gauge that worked before and I moved the sender and now it doesn't work. I had the sender in the pressure test port on the 4l60e, read high so I decided I'd put the sender in-line with my transmission cooler. So I lengthened the wire to the new sender location and now no workie. I re-did my terminal connection at the sender and the joint where I lengthened the wire to eliminate connection issues. I used a plumbing fitting for the sender, put barbs on the ends. I read the Autometer instruction sheet and it said "sender should automatically ground, if not make provisions for grounding it." Real specific stuff. I thought about screwing it out and putting a ring connect between the sender and the fitting and then running a ground. Didn't wanna bother til I got some opinions.

 

Take a piece of wire approximately 24 inches long and a hose clamp. Strip the insulation off one end of the wire about 2" back from one end. Place it onto the case of the sender and the hold it in place with the hose clamp(so the bare wire touches the case). Then strip back the other end of the wire about 1/4 inch back and crimp on a ring terminal that has a hole in it large enough to secure that end to to black ground terminal on your engine bay. That will effectively ground the sensor so it completes the electrical path for it to work
(your way will work too)

 

Yeah I'm gonna try that. I will use the ring connector between the sender and the fitting for a little neater install. I talked to my dad today and he said since I used teflon tape on the NPT threads on the sender, I may have insulated it enough to lose a ground.