Todd G 22HC

I apologize if I missed this topic. I have searched high and low. I, like many others, had to have my 6.2 replaced after having it die while on the Interstate. Fun. It took a little over two months to get it back from my local dealer. Right away I noticed an issue that was not present previously. At idle and between approx 1200-1500 RPM's (usually only after warming up, but possibly when cold as well) I get something between a shudder and full out battle between the engine and transmission. The same dealer lamed it on poor fuel and said it was an issue with detonation. So the next 5 fill ups were with 91/93 octane fuel (depending on what I could find) and the 91 was always ethanol free. NO IMPROVEMENT. I reset the system every way the internet tells you. It reset, but not what I need to be reset - assuming that's the problem at all. The worst part of this is that I never had this issue previously and they aren't willing to do anything with it except charge more time for diagnostics. Part of me thinks they screwed something up, although I am aware it could be an odd coincidence. I would appreciate any insight or tips beyond the basic things I have found. I have a basic scan tool which verifies that there are no codes. Pretty frustrated. New tires and new engine but she's a driveway queen aside from the times I decide to roll the dice. TIA.

I've been looking at options to either (safely) increase the travel of the power telescoping wheel or see if it is possible to put in a spacer behind the wheel while retaining full functionality. On top of that, I was wondering if anyone found a way to somehow modify the B pillar so your shoulder has some room to maneuver. I have had no luck finding any information on these things so maybe I am the problem. I can't be the only tall fat guy driving one of these trucks. But maybe I complain the most. Any info is greatly appreciated. Thanks