very hard ti fill the tank fast

Asked by Feb 12, 2017 at 05:57 PM about the GMC Sierra 1500

Question type: Maintenance & Repair

Hi when I go to gas up take very long , will not take fast fill up ???

2 Answers

7,695

Check the Evap system. The vent tube might be kinked or restricted and can't get rid of back pressure when you're pumping fuel. It's a 3/4" or 1" rubber hose that's connected to the fuel tank neck right below where u pump fuel

75,585

Also the canister filter gets saturated if you top off the gas tank when filling it. Suppose to stop refilling on the first click of the pump nozzle.

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