2001 GMC Yukon diagnostic codes

2001 GMC YUKON
145,000 MILES • V8 • AWD • AUTOMATIC
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SHERRY JOHNSON
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What does it mean when the repair code is P0440?

What should I fix?

Thanks, Sherry
Feb 12, 2008 at 2:15 PM
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DENNYP
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P0440 is an EVAP system fault. You first need to make sure your fuel cap is tight. If that ckecks ok, then you will need to take it to a shop that is equipped to test EVAP systems.
Feb 26, 2008 at 8:52 PM