4 week old 2016 Yukon denali XL, has stalled 3 times in last 4 weeks, engine cuts off after a left or right turn, and it has to be restarted! could have easily had an accident or worse. Took it to the dealer, 3 times. 1st two times, all of service dept. Could not diagnose the problem. Today, after a stall, called onstar, ran a diagnostics, found nothing of value, I left it at dealership and contacted district mgr. Matt tillson. I was told that they would escalate the issue. I did tell dealer that GMC and dealership would be at fault if vehicle is in an accident and dies while I am driving. I did not want the vehicle back without the problem having been fixed.

- Katy, TX, USA

On February 27, 2016 purchased a brand new GMC, Yukon sle, 2016, and VIN# ([xxx]). on February 28 2016 I noticed a rumble in the engine, a vibration of the entire vehicle, a loud hissing from under the vehicle and an extreme jerk when traveling uphill. On February 29, 2016 I brought the vehicle in to clyde revord motors, 7900 evergreen way everett, wa. 98203 for the mechanic to test drive. Mechanic concluded the nonconformities did exist. On March 3, 2016 I brought the vehicle in to clyde revord motors, 7900 evergreen way everett, wa. 98203 for repairs. Mechanic could not fix the nonconformities and ordered a torque converter. On March 8, 2016 I called clyde revord motors, 7900 evergreen way everett, wa. 98203 and was told incorrect torque converter was ordered and correct torque converter reordered. On March 14, 2016 when torque converter arrived I brought the vehicle in to clyde revord motors, 7900 evergreen way everett, wa. 98203 to install. On March 15, 2016 vehicle returned to me with three of the same nonconformities remaining a rumble in the engine, a vibration of the entire vehicle, a loud hissing from under the vehicle. On March 22, 2016 I brought the vehicle in to clyde revord motors, 7900 evergreen way everett, wa. 98203, for repairs of the three remaining nonconformities. On March 24, 2016 vehicle returned to me with the same three remaining nonconformities. On March 30, 2016 I brought the vehicle in to clyde revord motors, 7900 evergreen way everett, wa. 98203 for the manager to test drive. Manager concluded same three remaining nonconformities. Mechanic replaced exhaust flex joint. Vehicle returned to me with two of the same remaining nonconformities, a rumble in the engine at 1300 RPM rolling and a vibration of the entire vehicle traveling up hill. The vehicle also shakes when decelerating at low speeds. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Mount Vernon, WA, USA

Vehicle has vibration & noise wihen in 4 cylinder mode of operation. Gives headache on long drives. GM says that the vehicle is operating as designed. Most agrivating.

- Brownsburg, IN, USA