2014 Silverado won't start, battery OK, OBD scanner won't turn on

Brian Shaw · January 5, 2023

I tried to start my vehicle today, and got the dreaded clicking noise. Had dash lights, but they were flashing on and off. Tested my one year old battery, and the state of charge was at 47%, and it showed 12.01 volts. Plugged my OBD scanner in, and it couldn't boot up...all the LED diodes were flashing, and the screen would go on and off, then it just went blank. After the OBD scanner screen went dead, everything in the truck was dead as well. No dash lights, no dome lights, and the remote wouldn't lock the doors. This same situation happened in the summer. I had the truck towed to a shop, and they reported that the truck started for them. When I got the truck back home, I cleaned all the frame grounds, and checked the grounds under the dash, which were OK. Four weeks ago, my HVAC control panel went dead along with the heat while going to the store. It turned back on 5 minutes later. What could be the issue? Could it be a computer module going bad?

rlcole321 · January 8, 2023

G218 ground under the dash, sound like the problem, it was an issue with the earlier 'Rados, search the "G218" thread in this forum.

Brian Shaw · January 9, 2023

5 hours ago, rlcole321 said:

G218 ground under the dash, sound like the problem, it was an issue with the earlier 'Rados, search the "G218" thread in this forum.

Thanks for your reply. Yeah, I took off the dash and checked those grounds back in September. They were both fine. I'm going to replace the negative battery cable, since they're a known issue too. Since I only drive my truck twice a week, I'm also going to keep a charger on it to keep the battery fully charged during the winter.

Yotaman · January 9, 2023

Youtube Video May help as well.

It does sound like a ground issue but be triple sure the battery is good

does

Brian Shaw · January 10, 2023

Thanks for the video. Love SMA videos. Eric is one of the best. I did check all my frame grounds this past summer. All connections were cleaned to bare metal, so there are no issues with those. Like I stated on the other post, I'm going to replace the negative battery cable, and use my NOCO GENIUS 5 smart battery charger to keep the battery fully charged this winter. It's a one year Auto Zone battery, but it was at 11.94 volts before I started it last. I only drive the truck two times a week which probably explains all the issues I've been having lately.