i have a 2005 gmc yukon denali and when I place fuel in the tank the gas flows backwards, spilling. I have to pump REALLY slow and it takes maybe 20-30 minutes when filling up. Does anyone know what could be the problem??
Asked by glmgemini Aug 06, 2017 at 08:41 PM about the 2005 GMC Yukon Denali AWD
Question type: Maintenance & Repair
when fueling the tank the gas flows backwards, spilling. I have to pump
REALLY slow taking breaks and it takes maybe 20-30 minutes when filling up.
Does anyone know what could be the problem??
3 Answers
Restricted filler hose or more likely vent/evap problems
thanks, i will check that because i replaced a brand new evap solenoid and new purge valve and its still doing the same thing
It is the charcoal vapor canister and/or the vent valve attached to it. I also had a P0449 code. I pulled the charcoal canister and it was filled with gas, probably from the previous owner over-filling the tank. If yours is filled with gas, then jump for joy that the internals of the canister didn't break and send charcoal pellets through the hoses going to the fuel tank If that happened, then you have to drop the fuel tank and blow out those lines or you'll still have the obstruction. Also, I pulled apart the vent valve and it was filled with dirt Replace both the vent valve and canister.
