If you don’t have access to the service history of the vehicle, you might think of having the vehicle thoroughly inspected by a professional mechanic, to tell you what kind of shape it’s in.

At the very least, if the mileage is genuine, almost all the fluids will be due for replacement based on age, alone. Check the maintenance section of your owner’s manual to get the full list of items due at your truck’s mileage/age.

All the best!

When i baught it they changed the oil the trans was a little low so they topped it off fluid still looks and smells good 

i checked the dif fluids all look clean all in all very clean and maintained vehicle no record of plugs changed though should i go ahead and change them just due to age