2014 Silverado 1500 4x4 ext. cab, bought new. 93K Still on first set of replacement brake pads. Couple minor repairs while under warranty. Only major out of warranty repair, $350 for new A/C condenser last summer. Everything still works, including heated front seats and remote start. OEM battery went teats up at 3.5 years. Dealer's replacement was a tad cheaper than Advance Auto Parts.
Best part, still does 20 or better, highway mileage.
Total for repairs since a new Chevy in 2002, 2006 GMC, 2010 Silverado and the 2014, all 4x4 ext. cabs: Probably less than $600. And the 5.3Ls are rockets.
I have the the same 2014 truck with the GMC sticker on it (Z71 Crew 4x4 SLT). 103k miles - still has original brakes. Other than tires and a battery, the only thing that has been done is the AC Condenser, which was very common. Mine still runs like new, no creaks, rattles, still very strong (been tuned and a few parts replaced), and it's wearing 33x12.5 and will still get 20+ mpg on the highway. I'll probably get the AFM disabled because I made it louder and it can drone a bit in 4 cylinder mode.
With the insane prices out there now I have no plans to do anything with it. I have several friends with in the same date range with 200k+ miles on them.