| I bet that either one, the filter housing is cracked or 2 you didn't get the old seals/o-rings off when you changed the fuel filter. Also, there should be a bleeder screw on top of the filter housing...it is black and plastic. Personally I would call the dealer since it is on an 07. I guess it could also be the water in fuel sensor leaking out.
__________________ 2004 GMC 2500HD D/A CC Carbon Metallic w/ LB7
4" turbo back MBRP exhaust, Cognito UCAs & HD tierods
TST Powermax Programmer, Diablosport Predator
285/75-16 BFG T/A KOs, Eagle Alloys Series 187
Clifford 2 way remote start, High Idle, Bilstein 5100s, 1.5" lift blocks
AFE Magnum Force Stage 2 Proguard 7 intake
Racor 2 Micron pre-OEM with heater & water sep. Waiting install:Rancho Steering stabilizer....all thanks to NorCal Truck  Support your Supporting Vendors | 
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