Attempted to start the vehicle the next Morning and nothing was working?

MAMACOUCH1998

MEMBER
2007 GMC YUKON
6.2L
V8
4WD
AUTOMATIC
228,376 MILES

Going down the road the door started cycling and walking and walking the gauges in the dash started pegging out and dropping and didn't come back up and stability track come on the readout on the dashboard and traction control sometimes ABS brake light would come on for no reason and go back off. Then when I got home and parked it went out and started the next morning absolutely dead. I have replaced the battery the starter the ignition switch the starter relay and I still get absolutely nothing when I turn the key but at the lights everything in the dashboard the radio all that work stores lock and unlock Powers roll up and down windows but nothing when I turn it to the start position absolute silence no clicking no turning no moving nothing.

1 Reply

STEVE W.

MECHANIC
13,463 POSTS

With nothing working but the lights and not much else I'm going to have you check one of the problem areas on those trucks, the ground cables. They run one from the battery to the right front of the block and one from the battery to the radiator support (it also ties in the lights and horn to that ground) An easy test if you have jumper cables is to just run one from the ground on the battery to a clean spot on the engine. See if it tries to start. If it does remove the ground cable and inspect it, they corrode inside the insulation and still look okay. Also check the left-hand battery if it has it. Next there is a ground that goes from the block back to the firewall, those tend to rot off. Bad grounds can cause a lot of strange things.