I'm with the others here in resetting all maintenance I can do so it's fresh and a know the timeline and that it's done right with right fluids and filters. this would include oil, trans, diffs, xfr case, air & cabin filters.
I would also take a look at the coolant and depending on mileage change it too.
Some fuel treatment to clean the system.
Take a close look at tire wear to see if an alignment and rotation is needed or perhaps some wear items or idler and pitman. No need to ruin good tires!
If it wasn't detailed, I'd get a used vehicle detailed including a good under carriage and engine bay cleaning. This makes leaks and other issues easier to detect.
I also usually get a good set of mats to save the carpets at the outset.
Recently I started replacing the headlights and driving lights with quality LEDs that are typically brighter and will definitely last A LOT longer than typical replacements.
'18 Colorado ZR2 LWN 2.8L Diesel.
De-badged & Flagged. Soon to be "Bison'd"
'09 Sierra 2500HD LMM CCSB--SOLD
'05 Silverado 2500 LLY CCSB--SOLD
'14 Chevrolet Cruze Diesel
'19 Chevrolet Tahoe 6.2L
GO NAVY! BEAT ARMY!