was in a drive through, noticed a little smoke in the mirror out of my tail pipe, pulled up a few feet, it died and wont start back up. just cranks 100 mph but no fire up. anybody got any ides? o yea, its a 2007 gmc 2500 auto.

thanks

Try pumping the primer while you get someone else to crank it and see if it will start up. Ive had a few that the pump has gone up and you can get it to run for a minute if you keep pumping the primer.