Bad grounds

[the sandman]

I have a 02 3500 cab and Chassis what engineer thought it would be a good idea to put Brown on a cab Mount right behind the driver's Tire or put the main battery ground on the core support mount why is it that all the grounds on my Chevy seem to be broken in one way or another are there any more spots I should look for broken grounds gas gauge works for a second when the battery is disconnected and reconnected and then it goes out and stays out unless I hit the battery disconnect and then it will come on again for a second and then go out anyone know what's causing this

 

[the sandman]

Grown

 

[ORVietVet]

Welcome to the forum from Oregon.

Ground problems are notorious on lots of GM trucks. Look thru Charm.li and check where the grounds are on your truck and literally open up every one of them and clean/inspect. If need to redrill and tap and reattach, do so.

The fuel gauge may be ground related but could also be sensor related. Found this at Charm.li: https://charm.li/Chevrolet/2009/Sil...tem - GM Fuel System Treatment PLUS(R) Info./

Basically TSB#05-00-89-078C talks about the fuel pump sender unit gets sulfur buildup that causes readings problems and using an additive like Techron for a few tanks may clean the sensor up and get the fuel gauge to work again. Is way easier than replacing the pump sensor assembly. I am dealing with this on a customer's 09 Silverado K2500HD, right now.

 

[Cadillacmak]

Welcome to the forum!