Hi I have 2021 GMC Sierra X31 and had the service engine light come and go after a week the service trailer brakes, service power steering and service ECM among other codes. But it’s intermittent. It kinda seems when I steer faster than it pops and sometimes the rear camera comes on when this happens. It doesn’t matter if I am in drive or in park. Battery is good. Today I took the 3 wire harnesses off the power steering module and put them back on, cleared the codes and then disconnected the battery for about 10-15 minutes and when I turned it on everything seemed to work. I took it down the road and back. All good. Then I tried another test drive and by the time I got back I completely lost power steering and all the other stuff came back. I would really like to fix this myself since the dealership is about 3 hours away and I need my truck. I was reading this forum and someone had mentioned the bolts that hold down the fuse box by the battery. Just wondering what that was all about? Also if anyone has any suggestions, I’d greatly appreciate it.
