2017 Approaching 100k, How Deep Should I go?

[Andrei20]

There's been no issues with her and she's paid off! No sense in buying new.

Aside from the plugs, brakes, and general inspection, what else should I do? All fluids replaced? Rotors as a precaution?

What vehicle are we talking about?
If it's a Cummins engine, I'd recommend a valve set. Other than that, like on any other pickup, just regular maintenance, engine oil, transmission and power steering fluids, brake fluid (it's recommended every two years, but 99.9% of people ignore that, including me), transfer case, axles. Accessories belt.

 

[Jeepwalker]

4dr 1500 Ram, 5.7L (in the initial post)