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Off The Water
Watering Hole
Oh goody, another problem with the '03 Silverado
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<blockquote data-quote="mr.fish" data-source="post: 21076" data-attributes="member: 114"><p>Every 5 key turns, your emission system will throw a test. The gas tank will pressurize to test for any vapor leaks. If the gasket on your cap is bad or the cap is not on at all, the system will not pressurize, therefore throwing a check engine light. When the light comes on, it sets a code, and makes it easier for a mechanic to route out the source of the evap leak. If the cap gets tightened or even replaced, next time your truck runs the test it will reset the light. I used to work in a dealer, and alot of people came in for this exact problem. Most never tightened thier caps, and some were ligits evap leaks.</p></blockquote><p></p>
[QUOTE="mr.fish, post: 21076, member: 114"] Every 5 key turns, your emission system will throw a test. The gas tank will pressurize to test for any vapor leaks. If the gasket on your cap is bad or the cap is not on at all, the system will not pressurize, therefore throwing a check engine light. When the light comes on, it sets a code, and makes it easier for a mechanic to route out the source of the evap leak. If the cap gets tightened or even replaced, next time your truck runs the test it will reset the light. I used to work in a dealer, and alot of people came in for this exact problem. Most never tightened thier caps, and some were ligits evap leaks. [/QUOTE]
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Off The Water
Watering Hole
Oh goody, another problem with the '03 Silverado
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