2010 Chevy Tahoe Tighten Gas Cap

2010 Chevy Tahoe

Chevy Tahoe On the 2010 Chevy Tahoe, when the Tighten Gas Cap message comes on AND there is a Check Engine Light also on, this means there is a problem somewhere in the EVAP (emissions control/recovery) System. First, make sure the replacement fuel cap meets GM specs. Most aftermarket caps will not meet specs. If you are certain the cap is good, then the next thing to do is to have the Diagnostic Trouble Codes (aka “P-Codes”) scanned from the on-board computer. Unfortunately, there are literally dozens of parts and…

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2006 Pontiac Torrent P0455 EVAP Leak

2006 Pontiac Torrent

Pontiac Torrent On the 2006 Pontiac Torrent, the P0455 is “EVAP System Large Leak Detected”. This is a very “general” code, and there is no 1-answer, “it’s this…” kind of answer. There will need to be some testing done. If you have already replaced the Fuel Cap, make sure the replacement cap meets Pontiac OE specs. Most after market caps (like from Auto Zone) do not meet specs. Locking or Universal caps also do not meet specs. If you are certain the Fuel Cap is good and sealing correctly, then…

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