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2005 gmc envoy_sle
101 Posts
Discussion Starter · #1 ·
I had Auto Zone read the code. My question(s)...
I have seen the gas cap light come on in the past, so I would tighten it and it would go off. So how does the P0442 code point to the gas cap not being tight instead of just getting the gas cap light (an actual light showing the gas cap)???
How would the computer know the difference of any small leak in that general area?
I have a feeling this will be a hard one to trace :worried:
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