March 29, 2018 5:45 pm Update
Apparently if you ignore the “Tighten Gas Cap” message the check engine light will come on next time you start your truck until you “Tighten Gas Cap”. β½οΈ Very loose. Either I didn’t put it on correctly the last time I filled up two weeks ago or somebody’s been siphoning gas. Probably the prior. Learn something new every day.