Getgoguy

Any info would be helpful . Bought this new 2020 3.0 liter duramax to replace my tundra vibration at 65-plus . I do have 18” wheels with falken wild peaks on it but it has had a shake that felt like unbalanced tires even with the stock tires. I have had to the dealership several times they have visually inspected and don’t see a problem just paid them to road balance with little change. They put it in some test deal “pico” and that’s where they determined it was balance issue . I just drove back home 100 miles and nearly same vibration especially while going up slight incline . Not sure where to look for answers. They did say they didn’t see any dents or weights missing on driveline . I’m lost but not super excited about spending that much money for a crappy vibrating ride ..