Welcome, had a 2001 for 22 years, 280,000 miles, started burning a little oil and a mysterious coolant leak with no trace. At 217, finally had to rebuild transmission and replace most accesories. Now i did tons of offroading, camping, fishing, hunting, towing a boat and travel trailer. For its whole life, at 200,000 miles had to do upper control arm and swaybar bushings. Never broke down, never stranded me, and i beat the hell out of it. If you drive it normal you should get 350,000 miles or more out of it no problrm. Oh lastly at 248,000 had to replace a seal on the AC system, thats it. $4000 total repairs for an abused truck for 22 years, is damn good in my opinion.
If you want to just level it, do like i did for 10 years, just crank the torsion bars, no need to buy anything. After 1.25" level for me, it still had full travel and never had an issue, plus leaves about 1.5" of space before the control arms hits the stoppers. So unlike many trucks or SUVs, it doesnt max out the suspension movement, and only cost an alignment.
Great trucks, super easy to find parts at salvage yards.
Lastly recommend the 07 to 13 tahoe caliper and rotor upgrade. Makes a huge difference in stopping, especially if you tow. When i would hit long downhill graded, it would warp the rotors, after the upgrade, never another brake issue. For under $300 online, the whole setup was included, uses stock caliper bolts, brake lines, and bolts right in same spot. Just completely bolts right up. Just have to have 17" rims. Takes an extra 2 minutes on a brake.job to swap the parts. Unfortunately i see from the picture that you have the 16" rims. I got 2007 silverado rims to swap at salvage, $120 for the set, but that was 10 years ago.
Enjoy that bad boy, and great color choice.