Well, being a tech i replaced mine recently as I felt mine could make the truck handle a little better, which it did for me. My stock ones were not flat out junk but i felt an improvement. Usually on a truck you can fell the rear bounce badly under bumps and uneven wear on the front tires. I wouldnt think you'd need them at your mileage and age but take a look at them, if any are leaking oil you may as well do them. Ive seen some last to 100k easily without wear issues on the tires or ill handling, its a case by case scenario. In our roadrace bikes we change our fork/ shock oils 3-4 times per year because we can feel that difference on the track.
ps- my truck is a 05 with around 60k as well. If you can wait a year monroe has a deal every year call shocktober, buy 3 get one free. Saves about 80$ on your truck for one of the shocks. Look it up under google.