This is my second T1...traded in a 2019 2WD custom in order to get a 2020 4WD custom with a 5.3 back in March. Dealer called....offered me a brand new truck with 4wd, V8 and to lower my monthly payment without increasing my financing commitment. No brainer.
Got a 2.25" ProComp level up front ($520 installed at 4wheelParts Marietta) which allowed for 35x12.50x20 tires on stock wheels. Yes they fit. No spacers. No rub. No trimming (although I'd already deleted the "rock/mud guards"). It is NOT a trail boss, so hoping this gives others the confidence to go for 35/12.5"s where possible.
Tires are Atturo Trail Blade X/Ts which have a lot of mixed reviews from the 2015-2016 days, but have really gotten a lot better in the last few years. They balanced with a few ounces, look aggressive and so far ride quiet as a church mouse. They are 34.9" tall and 12.52" wide. Only paid $820 out the door (Discount tire gives you $200 or so for your H/T takeoffs...one of the few places that still pay for them), so if they last me anything past 18 months I feel i'm in the black.
She's actually sitting .75" nose high (reverse rake) at the moment, so I've got a SDT 1" rear block that I'm installing next month.
I've also got a Ronin antenna, Rough Country rear light strip under the tailgate, OEM bed liner, OEM steps, Chevy soft roll up bed over and Clazzio Leather seat covers in baseball glove brown (installed myself for $800....highly recommend over Katzkin). I also painted the tow hooks with plasti-dip red. Not permanent, so might do the full upgrade to rough country red hooks if I can figure out how to get around that pesky driver's side bolt (don't want to have to take the whole front end apart).
There's also a thread on here about the $20 exhaust upgrade that isn't permanent. I did that too and it sounds perfect (not high schooler loud, but perfect grumble and lets everyone know it's a V8 without being obnoxious). It would take me 2 mins to return it to stock.
Next steps: 1" rear block, window tinting, de-badge the CUSTOM on back, rear wheel well liner, AMP Power steps, and maybe some chrome (handles and mirrors).
All-in, including taxes, I'm still under $34K total for a brand new truck (including mods) that sits, sounds and looks how I want. Pretty happy with that.