Need Help No Crank

[Fowler]

i have a 2019 sierra at4 5.3.  so as stated i have a no crank issuse i have a few codes 

 

P0617-00

P0622-00

P062B-00

P16E3-00

P26E6-00

P305E-00

U0102-00

U01B0-00

U0284-00

U1345-00

 

So if your still reading i have changed the better, changed the batter sensor module and pulled the ground strap off the passenger side and cleaned eveything and reinstalled still the same also tighten the bolts in the fues panel under the hood so i am at the point iam not sure whatever to try and i rather not spend a pile of money on parts that may or may not fix anything.  if anybody has has this issues and have a guid on what i can check next that would be great.

[SteveP45]

Have you examined all of the wiring harnesses for damage by rodents such as mice or chipmunks chewing on the eco friendly and apparently tasting soy based insulation of the wiring?  Or other wear or broken connections.

 

 

[silveradosid]

this might help youhttps://gm-techlink.com/?p=15518

[Fowler]

That's my next course of action when the rain stops.

[Fowler]

so it was the main ground strap from the engine to the firewall under the fender skirt on the passenger side not the 14 inch small one that goes from the firewall to the chassie but the one futher in that comes directly from the motor to the firewall.  when i was looking for geound strap location i couldnt find much on location but a guy on here " auto raiders" pointed me in the correct direction.