Noticed a couple of weeks ago that when driving up hill the Ascent ( 2019 ) would jerk or miss out but not when going down hill or driving on flat land. This is an intermittent problem. The day I took it to the dealership and coming out of the mountains into the valley, no problem. And after staying at the dealership for a few days, they found no problems. The car was also having a break job at 26,000 miles. The next day after picking up the car, the same hill it started to jerk and the RPM jumped around. This car has all the updates, recalls, etc. Notice that Keith99RS also had the same problem but didn't see the resolution. Going back to the dealer on Monday and they plan to keep the car all week to drive in the mountains. Any suggestions what may be going on ? Remember, all updates, recalls, and has premium ags.