mada2885

Thanks for the reply. They were at different gas stations.

I did a quick search but didn't find anything really similar. I have a 2018 Sierra I got a couple months ago. This is my first experience with a capless fuel system as my previous truck was a 2015 Sierra. Twice so far I've had substantial overflow when fueling up at two different gas stations. I'm very careful when filling up and I fully insert the nozzle and pump only to the first click indicating it's full. That's where the problem seems to be. At that click gas spills out and then down the side of my truck. I've had to thoroughly wash and wax the area twice now and it's becoming pretty annoying. Not to mention I don't want any paint damage. Does anyone have any thoughts as to why this might be happening? Am I doing something wrong? Thanks.