DTC’s keep returning

Mike1205 · June 30

I changed my from brakes and forgot to put my 2020sverado into maintenance mode. Set reduced power and T/C also brake warning and ABS. SO I So I tried set it into maintenance mode and reset it. Did this several times with no change. Then my parking brakes locked. Got a scan tool reset all DTC’s. But still had service engine light. Truck ran fine until I shut it off. As so as I turn it on ALL DTC’s came back with reduced power and steering. Limited speed also. Docs are: U3007, P0604(1/10), p25A2-00, C116C-71, C116B-71, C116B5A, C053B, C0021, C1595, any thoughts would be appreciated . And now the parking brake won’t release

Edited June 30 by Mike1205
More codes

Chillin36 · July 1

good morning, sir.

same thing happened to me on my 2020 gmc Sierra. try disconnecting the battery. I kept getting the same codes and warnings so i gave up on it. I just left the battery disconnected overnight and truck was back to normal in the morning. I did change the brake pads to early so I had to have the dealership reset my brake pad life.