Why Is My 1997 Gmc Jimmy Overheating?

What is your question?

Hi I have a 1997 Gmc Jimmy that's overheating. When starting the truck it takes longer for it to heat up but when driving a small distance it gets all the way up to 260 degrees and drives fine. It doesnt appear to have any issues driving, no smoke, it does show some power loss but it does have 219,000 miles on it. Idk if it's a coolant leak or not. I put antifreeze in it yesterday when it started over heating. There is still antifreeze in it and iy didnt appear to help anything.

What makes this problem better or worse?

When driving for about 10 mins.

How long has your 2001 GMC Jimmy had this problem?

Since Yesterday