Steve_G

I just had someone put a tester on the truck to see what codes might be showing up and all that comes back is "ERROR".

I put a jumper on the starter relay and starter turns the engine fine so I know the battery is good.

I can't find a fuse listed as being For PCM B. I was thinking maybe the "Engine control module" fuse was the same but It wasn't blown. Or any others I checked.

So I have a 2016 Sierra. No issues till yesterday when I went to start after running into a store. I got one click then nothing. All the different systems service warnings come on display when I turn key. I recharged battery to make sure it was good. I jumped the starter relay to make sure it wasn't starter. It turns over great with or without the key on. Having all the systems service warning coming on seems the most confusing. Any ideas would be appreciated. Thanks