p0455 code on chevy suburban LT 2005

Question

I've changed the purge valve, solenoid, and charcoal cannister and still it's hard to fill my tank and my check engine light is on. What next?

Answer 1

Hi there

This code is for a large evap leak. This normally will make it easy to fill the tank because there are fuel vapors leaking from the system. I would look for a possible blockage from the canister to the purge control line. If the charcoal is being sucked into the purge line, it will cause the hard fueling. As for the evap leak, I would check the gas cap. If it's fine, then you should have a smoke test done to locate the problem.