Well after 315.5K miles I decided the 2010 NHT Silverado had reached the end of its service life, so I just traded it for a 2019 GMC Sierra Denali - would never give up the 6.2! Mobil One exclusively, 5 set of tires, brakes at 265K, shocks, etc. at 285K and it was still getting 18 mpg!
Badbo: I swapped my 17s for factory 20s (GMC Sierra/DenaliALY 5419 with Goodyear Eagle LS-2 P275/55R20) on my 2010 NHT LT Crew. I commute about 100 miles a day. The ride is a little firmer/sportier. Overall tire size is the same so no change in speedo (per GPS) and no loss of gas mileage (I average 17-18 mpg consistently).
I also tow a 30' utility trailer with 6-7000 lbs for weekend high school band trips with absolutley no problems with stopping, starting or swaying.
Black with "4X4" decals deleted and the 20s frequently garners compliments!