2019 GMC TERRAIN Steering Problems

Friday July 25, 2025 I was driving my 2019 GMC Terrain SLE and when exiting the interstate the brake pedal got hard and I could not stop. After almost rear ending another vehicle, I got the vehicle into the ditch and safely off the road. After several attempts to correct the problem, I was unsuccessful. The vehicle was towed home and seen by a mechanic. The vacuum pump went out while I was driving.

My ESC randomly comes on. Service parking brake message comes on intermittently. Messages pop a up saying steering wheel assist limited, drive with care. Again, all of these are intermittent but when they happen my steering wheel locks up. Even mid turn. Being intermittent it doesn’t always happen and weather seems to affect when it happens, or that’s a coincidence.

When turning right or left from a stop, the steering wheel jerks sharply in the opposite direction as soon as the car starts to accelerate. Diagnostic tests and inspection determined that the steering gear is loosing voltage causing the jerk in the steering wheel. The gear has the latest calibration and needs to be replaced. Cost estimate to replace is $2035.63

THERE ARE NUMEROUS DEFECTS RELATED TO THE STEERING, THE LOW SPEED FORWARD AUTOMATIC BRAKING DOESNT WORK AND THE FRONT PEDESTRIAN BRAKING DOESNT WORK. THE LANE KEEP ASSIST WORKS MOST OF THE TIME BUT THE LANE DEPARTURE WARNING NEVER WORKS. I BROUGHT IT TO THE DEALER 3 TIMES AND EACH TIM EIM TOLD THAT SINCE THERE ARE NO COMPUTER ERROR CODES IT HAS TO BE WORKING. THEY EVEN GAVE ME PAPERWORK WHERE GM TELLS THE MECHANIC WHAT TO TELL THE CUSTOMERS WHO COMPLAIN THAT THESE FEATURES AREN'T WORKING.