I have an 01 yukon that died while driving down the freeway and wouldn't restart. when you crank it over it starts for 10-15 seconds surges the whole time and then dies. I have changed the fuel filter and have gotten under the vehicle and heard the fuel pump building up pressure but can't seem to figure out why it wont start or when it does stay running. The minute you push on the gas pedal it dies. Anybody have any suggestions?