gas smell after running on 2004 GMC Envoy

There is a gas smell coming from my car ( near the front doors)when I get home.... They have checked for gas leaks and changed the gas filter. What do we try now?

Asked by for the 2004 GMC Envoy
Have someone check the evaporator on tank.. i hav Replaced several on these vehicles .. also the Fuel cap's do go bad.. and dont vent
2 more answers
there is a recall on the gas tank. it cracks at the filler 04 had the same thing.
turns out the pipes comming out of the fuel pump were rotted out... I had to have the fuel pump replaced.... Smell gone! Thanks for the help and I will watch for these other reasons.