2020 GMC AT4, 5.3L, 10-speed, 32k miles.
I was on a trip in early May, 5 hours from home. Bad timing for an electrical problem. I've never had a problem before, the truck has been perfect.
I had just driven about 550 miles in the previous 1.5 days. We stop for dinner, come out and start my truck. The Service Power Steering and Service ESC light up the dash like a Christmas tree. Driving with no electric steer is both difficult and dangerous. But I limped it about 2 miles to our hotel and jumped on the forums.
Sadly, GM-Trucks.com has an 11 page thread about this issue in 2019-2020 GM's. So strange, but the solution was to wait 20 minutes and restart the truck. I did that (it was more like a half hour) and sure enough, it worked perfectly again. Strangest damn thing I have ever experienced with a vehicle. Upsetting.
That was at 30k miles (yes, I put 2k on in about 4 weeks). It has not recurred. I don'k know what happened, whether it downloaded its own software patch, "rebooted," or reset in some way, but it self-resolved (at least for now). According to others, some dealerships are saying they've never heard of such a thing, others are saying they've heard it but not seen it. It seems like one of those things that is common enough to be concerned, but not so common that a TSB was issued or a recall exists.
I still don't have a good answer as to what happened, but am throwing this out there in case anyone else experiences it.
Sent from my iPad using Tapatalk Pro
I was on a trip in early May, 5 hours from home. Bad timing for an electrical problem. I've never had a problem before, the truck has been perfect.
I had just driven about 550 miles in the previous 1.5 days. We stop for dinner, come out and start my truck. The Service Power Steering and Service ESC light up the dash like a Christmas tree. Driving with no electric steer is both difficult and dangerous. But I limped it about 2 miles to our hotel and jumped on the forums.
Sadly, GM-Trucks.com has an 11 page thread about this issue in 2019-2020 GM's. So strange, but the solution was to wait 20 minutes and restart the truck. I did that (it was more like a half hour) and sure enough, it worked perfectly again. Strangest damn thing I have ever experienced with a vehicle. Upsetting.
That was at 30k miles (yes, I put 2k on in about 4 weeks). It has not recurred. I don'k know what happened, whether it downloaded its own software patch, "rebooted," or reset in some way, but it self-resolved (at least for now). According to others, some dealerships are saying they've never heard of such a thing, others are saying they've heard it but not seen it. It seems like one of those things that is common enough to be concerned, but not so common that a TSB was issued or a recall exists.
I still don't have a good answer as to what happened, but am throwing this out there in case anyone else experiences it.
Sent from my iPad using Tapatalk Pro
