While driving vehicle at normal speeds the steering assist goes out and becomes very hazardous to drive. It is intermittent and does not do it all the time. When connected to dealer diagnostic machine it throws several codes. I have read on several GM sites this problem is widespread and GM is actively saying they haven-??t heard of this problem. When the problem occurs it is almost impossible to control the truck to get over to the side of the road.

- Richmond, NH, USA

Loss of power steering. Loss of engine propulsion at high rates of speed. Engine would not start.

- Keswick, MT, USA

The contact owns a 2020 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle started pulling to the left, and the vehicle ended up in the next lane. The vehicle returned to normal functionality, but the failure became a regular occurrence. No warning lights were illuminated. The vehicle was taken to the dealer, who was unable to duplicate the failure. The vehicle was not repaired. The contact stated that the vehicle had been taken to the dealer six times because of the failure. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 17,000.

- Branford, FL, USA

The ESC comes on and loss of power steering

- Bridgeville , DE, USA

I went to start my truck after going into the store and the Service Power Steering ESC warning came on and I had no power steering. This is a very dangerous situation without power steering in the vehicle and someone is bound to get seriously injured if this happens while they are driving. I have read numerous threads on this same issue and it does not look like GM has taken this into accounty by recalling all these vehicles with this same exact issue. While most complain that when they take it to the dealership, they cant find any error codes, or when the replace the modules it starts creating more issues with other electronics. GM needs to take care of this issue with the power steering module so the safety of their drivers is not compromised.

- San Antonio, TX, USA

On 01/07/2025 I got in my truck to take it to GMC for an oil change and 75,000 mile service. When I began to drive I noticed I could barely turn the truck at all. The power steering was not working. Then a warning popped up to have the power steering serviced. The GMC dealership is an hour from my house. The entire drive the power steering didn't work. I explained what was going on to the GMC dealership and when they went to look at the truck the power steering was working again. When I left the dealership the power steering was working. I stopped at a friends house for about an hour and when I went to leave the power steering was not working again. I ended up having to drive an hour again with no power steering and made an appointment with GMC to get the power steering looked at. Currently they haven't commented on the Power Steering function but rather that there is a gear needing to be replaced in the steering column. Upon looking online it shows "Several model years of GMC Sierra trucks have been subject to a recall for intermittent power steering issues related to electrical glitches within the EPS system." However, my truck seems to not be on this list of affected vehicles but there is no other explanation of why this is happening with my truck and GMC has not commented on why it is happening but it is extremely dangerous.

- Union, WA, USA

On [XXX], I was driving my truck on [XXX] through Phoenix, AZ. It was 5 days after I had purchased the vehicle and only had 250 miles on the odometer. I was in the left lane was traveling at approximately 75mph. Within the span of about 20 seconds, several lights on the dash annunciated and several messages including a message about a brake failure and steering assist failure and then the engine suddenly turned off. The steering seemed heavy and the brakes seemed less responsive. I was able to coast to a stop on the side of the road thanks to the help of a couple truckers who blocked traffic across multiple lanes. The truck was towed to the dealer and they told me the entire engine needed to be replaced. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- North Pole, AK, USA

Without warning power steering went out. Flashed code: service power steering; service esm and traction control light. After two restarts, went away like it never happened. I was backing a 24 ft trailer at the time of occurrence. There are numerous other people with the same problem in online forums. I cannot believe that there has not been a recall or even service bulletin regarding this problem. It is a MAJOR safety concern

- Jacksonville, FL, USA

While driving, the power steering (electronic) failed. Driver Info Center gave no waring until the system failed. After failure the DEC gave a warning to "Service Poser steering".

- Vine Grove, KY, USA

The right side started clicking out of no where when I turn the steering wheel

- Southfield, MI, USA

Electronic power steering stops working randomly which makes it nearly impossible to safely drive the vehicle. The strength needed to turn the vehicle is so great that the steering wheel elevation lock fails and the wheel slams to the lowest limit of travel. Problem started around 50,000 miles and was only a warning that went away as soon as I got in the truck again. However reappeared today and the steering went out this time. The GM dealer in Mexia Texas didn't know what was wrong, I am taking it to a dealer in Corsicana tomorrow. This is a known problem that GM has had in the past however my vehicle has no active recall to make my truck safe free of charge. This puts myself and other drivers at risk because there would be no way to rapidly maneuver the vehicle to avoid a colision.

- Mexia, TX, USA

The truck has developed a shake that can be felt in the floor boards, seat, and steering wheel at highway speeds. It-??s has spent several months at dealerships without being fixed. I have replaced tires, wheels, shocks, upper control arms, and the transfer case without success.

- Harlingen, TX, USA

I own a 2020 GMC Sierra 1500 4-Cyl, Turbo, 2.7 Liter with 20K miles and I owned the truck for almost 2 years. All of a sudden my vehicle started receiving multiple warning messages. While driving I stopped, and when traffic stopped in front of me the engine died all the lights were on warning messages on the dashboard started showing up. Electronic Stability Control, Antilock Braking System, ECM, reduced Engine Power, etc., and the brakes were hard to step on it and the steering wheel hard to turn, I took my foot off the brakes and pressed it again to start. It started but the check engine light was still on, this happened FOUR times already and THREE times while parked when I tried to start, after a few tries giving few minutes intervals, it will start with all the lights on and warning messages on the dashboard start showing up. Electronic Stability Control, Antilock Braking System, ECM, reduced Engine Power, etc., and the brakes were hard to step on it and the steering wheel hard to turn.

- Aventura, FL, USA

Normal driving conditions vehicle decelerated and warning lights and notification appeared. Warning were -??Service ECS-?? and -??Steering Assist is reduced Drive with care-??. Shut off vehicle for 30 minutes and warnings were no longer present and vehicle drove normally. Happened again 24 hours later. Received email notifications from GMC to arrive within one day. This was a know recall of the previous model year.

- Two Harbors, MN, USA

Drivers side upper control arm failure. Threw truck into oncoming traffic. Dealership has inspected multiple times stating everything was good to go. Been complaining about a loud clunk to dealership for months

- Remer, MN, USA

I started my truck like normal and my service power steering light drive with care message came on and then Service ESC and the traction control light. My power steering was completely gone. I researched and found that 2020-21 GMC SUVs were recalled due to the same issue. My GMC truck is doing the same thing. I barely made it home from the store not having power steering is extremely dangerous, I still have no power steering. I just purchased this truck from CarMax last month.

- Hutto, TX, USA

The truck stated to have the check engine light on, by the time that happened the brakes were hard to step on it and the steering wheel hard to turn, I had been asking to GMC superior of Siloam springs to check the truck because, got scared while I couldn't make stop the truck while on traffic, but they don't had open appointments for that day or the other following days, so a week after they got one and I missed because my work, I set another one at GMC on Springdale but they want me to charge me whenever the truck has an extended warranty, so I told them to leave it like that so finally got another appointment at Siloam springs location but while driving down there the same thing happened all the light on warning messages on the dash board start showing up and the brakes were hard to step on it and the steering wheel hard to turn, I got told them what was happening, about and how exactly happened. That day after 30 minutes I got a call saying that it was fixed I still asked if they were sure he said yes, the next day I almost crashed with a neighbor at my work place because I couldn't stop the truck, so today I took back the truck and the guy at the desk told me that they may just erase the codes and don't really checked what was wrong, I'm just filling this report because even if I got full coverage on that truck, I'm not gonna be responsible if I'm involved in an accident.

- Springdale, AR, USA

Steering locked up after normal use at lunch. After sitting, traction control light then on and wheel would not turn after work. Did a computer reboot and steering released. Results still pending, she is not home yet.

- Ashtabula, OH, USA

It was fine and we drove to our neighbor, parked about 15 mins. When we started the truck to turn back, the steering was super heavy, with 2 messages pop up on the dashboard: Services ESC, and service power steering drive with care. Tried several times to re-start the truck, it's keep the same. In our neiborhood, parrot tulip view, pflugerville, tx 78660. Raining all night, not sure if it's related to the weather.

- Pflugerville, TX, USA

My truck Tuesday March 16th had me update software as soon as I got to work, after it was done I got out of my truck and it would not lock with push button or fob. When I got into my truck to go home 10hrs later it made a bunch of clicking noises and after a minute it showed update complete on screen then started. The very next day I drove back to work which is 22 miles. When I took my truck to lunch three blocks away I had ESC service light and service parking brake accompanied by check engine light. I called local dealership to get it looked at and they said Friday was as early as I could get it in. I left work early at 1:30 and tried to drive it and it was squalene like a bad power steering pump and shaking as I drove. I went ahead and took it the dealer.

- Burbank, OK, USA