Battery Gremlins?

[Glava2876]

2020 Siera 1500 Denali 37k miles

Today I started getting a bunch of messages

have check engine light

service trailer brake system 

service power steering -drive with care

service side detection system

 

power steering cutting out at low speed

open door and the power running boards are opening backwards 

is this a change the battery moment?

or take it to the dealer -I have no warranty 

[EddDe]

Could be the dreaded bad grounding strap. Check out this post:

2019+ Silverado Electrical Issues Attributed To Braided Grounding Strap - 2019-2025 Chevy Silverado & GMC Sierra Troubleshooting - GM-Trucks.com

 

https://www.gm-trucks.com/forums/topic/260048-2019-silverado-electrical-issues-attributed-to-braided-grounding-strap/

[Glava2876]

EddDee, That’s exactly what I found when I looked at the braided ground strap on my truck. Haven’t changed it out yet hopefully in the next day or two. I’ll get back with the results. THANKS!!

[Glava2876]

Installed the new cab to chassis grounding strap and ALL gremlins are gone, 

Like others, the braided strap was oxidized to just about powder -only a about 1/4 of the strands were left, but all were toast.

Thanks to all that pointed me in the right direction!

[EddDe]

What a relief...congrats! What kind of grounding strap did you use? Does an insulated battery cable with pre-installed terminals work okay?

[Glava2876]

I actually bought the factory replacement. It’s GM pn 84498265. My local dealer had it in stock -it was $22.00.

[Glava2876]

1 hour ago, EddDe said:

What a relief...congrats! What kind of grounding strap did you use? Does an insulated battery cable with pre-installed terminals work okay?