Fuel system: after filling up my 2006 gmc envoy with fuel my vehicle would not start. it took 2 attempts of turning the ignition in order for my vehicle to start. the fuel meter still continued to read empty. any time, i would stop and restart the vehicle, i had the same issue. i called onstar to provide me with a goodwrench diagnosis on the vehicle and they stated the diagnosis was the fuel system. onstar stated the vehicle needed to be serviced within 7 days. i noticed there was an investigation for this same issue that was opened on january 7, 2010. *tr