Just use paint correction compounds if you already have them. No need for a headlight kit.
Keep in mind that the plastic is softer than the clear coat so start with the fine compound.
If the condition is bad, you can wet sand it using 1500 or 2000 grit depending on condition.
Anyway don't worry...
If original radiator, then yes.
Add pcv valve, very cheap.
Fan bearing/support?
Thermostat.
Timing chain doesn't need replacement, it is just one of just because you are in there, and it will keep it quiet for longer time, before inevitable chatter will resume.
I use an Autel MaxiTPMS TS508 for all my tire needs on all my vehicles, but that is $180, so not cheap. I got it in 2019. The current model is WiFi enabled but besides that it has not changed much. They release periodic updates to bring it up to date to the newest cars.
I found it convenient for...
I just finished replacing the fans. One was almost dead with the wheel hardly spinning. The other was still good. The test with blocking the noisy one confirmed the need for repair before I started down this path.
I ordered the same part numbers as the originals from eBay (link). Almost the...
I have the LX card and happy in that regard. But it looks like you have a different year LC truck. Maybe you post in the part number thread and they can help you.
https://forum.ih8mud.com/threads/the-official-part-number-request-thread.1327320/
A rust converter goes in first. Unless you go nuts with the grinder and then have a lot of prep work to do, some hard to see rust spots will be left on the metal. To deal with them and for the peace of mind I always apply converter first. After that follow the regular body paint process.
Not necessarily starting there, but for sure it extends under the trim. If the rust is inside the frame, that is a possibility, but you will find out only after removing the trim. Besides, removing the trim (which is easy) gives you better access to deal with it and properly fix and paint.
If...
I don't know what causes your problem but I have two front sensors that went bad. One is beeping after heavy rain a d most of the winter.
I didn't find any solution or troubleshooting other than replacement.
They are not cheap in my color.