Hi all, new here. I have a 95 Jimmy SLT 4X4 and I purchased her about 6 months ago. Since I bought it, the idiot light goes on and off every few days. No drivability changes and can't figure out the pattern except when I fill up, it goes off. I replaced all the vacuum lines to and from the ball. Any idea's?

 

Maybe try a new gas cap? It could be loosening after you put it on.