Nut and Bolt tightening checklist

Is there a list out there of what the manual is talking about for the maintenance item "tighten nuts and bolts on chassis and body"? Started towing recently, and will continue to be doing a lot more in the future and just want to make sure I'm checking everything I need to on the truck.

I also find it "funny" that the front diff oil needs to be replaced long before the rear diff and transfer case oil.

 

Do both differentials at the same time.