I have a 2002 Tahoe that when parked in a down hill position with 1/4 tank of gas or less won't start. Cranks over but nothing. Has happened 3 times in the last 2 months. Twice I added a few gallons of gas and it started. Other times I rocked it by rolling and finally got it going. After reading many posts I feel that the fuel pump may be the problem. I starts great all the rest of the times. Is this a coincidence or could this be the downward slant? Don't want to go to the trouble of dropping a tank if not required..
