My 2016 GM Canyon Duramax has been in the shop since Oct 20. Thought it was finally fixed today but drove it and has intermittently long lags between pedal a certain and actual acceleration. No codes show! Replaced turbo, several sensors, intercooler parts, still it is not fixed. I would have never thought GMC would be unable to fix a dang 4 cylinder Diesel engine in under 110 days! And now it gets moved up to corporate tech, the ultimate black hole. I will say GM is trying to find the issue, however after 110 days I’m thinking they need to think WAY outside the box and get me into a vehicle that runs! Thoughts? Comiserators?