Dominic58

This sounds like a common problem and doesn’t sound like they have a fix for it. Im starting to get worried.

my 2021 silverado 1500LT 5.3L has the same symptoms, this started about a week ago, service parking brake, rough idle, engine light and anti-traction disabled. i find if i turn it off and then restart it goes away but yesterday i got a message from onstar diagnostics that it detected a emissions problem and i need to take it in for service within 7 days.

I’m getting one tomorrow!

About a week a go I get this message service parking brake and the truck is riding real rough, anti traction is disabled plus the engine light is on. I pull over and shut it off for a min or so and restart it and all is fine. Happens again yesterday again, so the same routine I shut it off and restart and all is fine, Then today it happened again but three times however today onstar sent me a diagnostic message saying I have a emissions issue and to take it in for service with in 7 days. Anyone have any ideas?