Six months ago, I bought a 2005 SLT 1500 quad cab 4x2 with a long bed. She's got 190k miles. The seller kindly provided all service records.

I've performed the following maintenance and looking for feedback re: am I missing anything?
Maintenance performed thus far:
Maintenance which I believe should be performed:
Items of concern:
Your feedback is greatly appreciated.

I've performed the following maintenance and looking for feedback re: am I missing anything?
Maintenance performed thus far:
- Oil Pressure Sensor (hellova scare the day after I bought it)
- New AGM battery to replace the dying battery (and post clamps)
- Replaced Idle Air Controller Sensor (erratic idle)
- Replaced Throttle Position Sensor (because of erratic idle, might as well do both while I'm there)
- Transmission Flush, (with/ new tran filter & filter kit pan)
- New tires (and an alignment!)
- conventional oil change (no point in switching to synthetic at this point)
- Drop-In "K&N style" air filter
- Throttle Body has been cleaned
- airbox has been cleaned (along with the little sensor inside)
- Replaced Upper and Lower passenger control arms
- New windshield (had a chip)
- New wipers
- Airbag Recall
- Rear Axle Pinion Nut Recall (dealer had to "rebuild the whole thing")
Maintenance which I believe should be performed:
- plugs (bought 8x Champion RC12MCC4 (439) Copper Plus Spark Plugs)
- coolant flush (looks like it's been 100k miles since)
- brake fluid flush
- power steering flush
- check rear rotors, pads
- PCV valve, which I forgot to install while I had the airbox off :-/
- replace wiper motor to fix the crazy wipers
- clean the wiper fluid reservoir so the light will go off.
Items of concern:
- Serpentine belt was last changed roughly 100k miles ago
- Front brake pads have little life left. Records show rotors were turned once. I plan to replace both pads and rotors at the same time.
- No records re: replacing the hubs, so I'll include those while I do front brakes. I haven't experienced any issues/concerns with the hubs, but at 190k miles, I might as well replace.
- Tie rods/sway bars...front end stuff. I'll inspect when I do the brakes.
- oil pan is leaking. Not bad, but it's leaking. Will tighten bolts to see if that helps.
- I found a recent record where the dealer reported the power steering was leaking. Will need to investigate.
- If the dealer replaced the rear axle pinion nut, doesn't that mean they replaced the rear differential fluid and cleaned the rear axle pumpkin?
Your feedback is greatly appreciated.