I prefer to do as much of the service/repairs on my Burb as I can. That way I know what has been done,and what may need attention in the near future, and were the fasteners torqued properly and cleaned,all parts needing lubrication got it,etc. Most shops aren't going to treat your vehicles like they were theirs. If you find one that does, keep them handy.
However, sometimes I don't have the time to do the fixing, so I have a shop that can. They were able to replace the u joints last year, when a driveline noise suddenly got a lot worse. Mom and I were between work visits,and I didn't have time or tools to do it right then. For the money spent, it was well worth it,to get back on the road. These guys do my annual state inspection, and are familiar with my Burb. I've had them do a couple other jobs on it that I couldn't handle.
They did the state inspection on it today ( passed with flying colors! Yay!). Tomorrow I'm bringing it to them to do the front end work that I haven't been able to get to. With power tools and a lift, they can get it done lots faster than I can.
My dad brought me up to know how to fix stuff on our cars and trucks, so I wouldn't get taken advantage of.
To answer your question a little better; yes, most basic maintenance on these trucks is stuff that's not difficult, and it's good knowledge to have.