S.S.
i love my suburban, I can fit so much stuff in it! People ask me often to help them.
You really need to go to a used car lot with pick up trucks and see which one works for you. I don't know if you're tall or short or what. I don't know if you will be toting your grand babies while you are thrift shopping.
If your car gets you from point A to point B and doesn't cost you every month in repairs? There is no downside. Log on to consumerreports and get information on the trucks you have narrowed it down to. If you have a trusted mechanic? Ask him/her which trucks they work on the most!! Then you know what to avoid as well!
Good luck! Congrats on retirement!