Lost all electronics
 

2018 Silverado. So battery died tonight. Tried to jump no matter what i did it just ticked. Crazy thing is it fired up drive it a mile and then it was dead. Optima battery. Checked battery 10.5 volts. Took battery out and had tested. Was bad. Got new battery. Runs but lost most electronics. Lost the following
Touch screen
Interior lights
Passenger windows
Rear turn signals
Brake lights
All ac and heater controls
Get a couple needs service pop ups like. Traction control. Tire pressure monitors. Something like safety restraints

Disconnect negative battery cable. Says i need to roll driver window down and back up. Does not help

Any thoughts?

Re: Lost all electronics
 

Try disconnecting both battery connections for about 5 mins. Then when you reattach, try your best to limit the sparking at the terminals as you tighten the terminals.

The sparking induces voltage spikes and the pcm, bcm, and other modules goes into a safe mode to protect itself. Try that first and make sure the terminals are tight. Then check your fuses. Once the voltage and grounds are clean to the pcm’s liking, it will perform a relearn.

Re: Lost all electronics
 

No luck, pulled cables off, checked all fuses all good, careful reconnecting, same thing. thanks

Re: Lost all electronics
 

The multi pin plug that goes into the bulkhead over the battery had to be repinned. Apparently some of the connectors were loose. crazy thing, I had no issues unplugging, or plugging back in.

$330

Re: Lost all electronics
 

Well that’s a first. Thanks for letting us know