Just replaced my condenser at 79k, so they do go out. $1300 repair and AC will freeze you out now.
If the AC is warm, something is wrong, period, been through that crap enough living in FL.
I saw a previous comment about the trans - my 2017 Tahoe LT has a 6 speed, not an 8 speed - unless I'm crazy, but sure feels like 6 gears.
For what it's worth - coming out of a F250 Lariat extended with the diesel - I love being able to whip a u turn in the short body Tahoe. Thing turns like a jeep in tight spots.
But with 4 kids I'd get the XL.
5.3 is plenty of power BTW for the regular Tahoe, I test drove a XL with the 6.2 and it was a beast.
But premium is a turn off for me, too many rural stations are a crapshoot, and we road trip to weird places around the south.
Great trucks, you love either one, had a loaner Dodge Ram during repairs and couldn't drop it back off fast enough, no comparison to a Tahoe or Yukon.