Ok guys I have a 5.7 vortec powered tahoe and need any help you can give me. Went to my truck last night and it wont start. It cranks and cranks and cranks, but wont start. Every now and they it rumbles a little like it wants to start but nothing. I pulled a plug and i have spark. And i have fuel at the schrader valve ontop of the intake. It just so happens that i filled up with gas last week and parked the truck within a mile of getting gas. Anything i can try before i take it to the shop. Thanks for the help.