Hey I'm starting to think I may have a gas leak in the Silverado even though I don't smell gas I have gone 67 miles on a little less than half tank & I'm driving normal I used to be pushing 140 at this point. I also keep parked on level ground so not the gas sitting on one end of the tank. A few times I let it get down to 1/4 left & in no time it was on E with the gas light on. I am doing everything as normal used to be able to get about 2 weeks of driving on 3 1/4 tank now not so much. Any ideas on what I can check?