Question about 2004 Chevrolet Avalanche

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2005 1500 avalavche changed the gas cap but still tells me to tighten gas cap..hat eles could it be?

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  • richstacey93 Jul 14, 2009

    thanks for the quick response..I will have to take it in and have it put on a computer check..thanks again

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So far you have done the right thing. Next question is has anyone been under the hood just pryor to this light comong on. Possible something was knocked loose.
If not then you need to have it diagnosed. You have a small EVAP ( fuel fumes) leaking out when being tested by the computer. It could be anywhere from the engine compartment to the tot of the tank to the filler neck.
Or it may be a pressure sensor that is out of specs or a purge or vent solenoid.
If you dont have the proper equipment then it need to go get diagnosed.

Posted on Jul 14, 2009

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My 2004 Z66 Avalanche 1500 has a HUM when I reach 40 and after 60 it goes away. An Auth. Chevy dealer rebuilt the rear end to the tune of $2500 And it didnt do any good. It still is the same

Posted on Sep 04, 2009

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I would also check the lines and hoses going to the fuel tank. Any leak in the vapor recovery system will show up as a cap leak which is only a part of the system. (just did one on a Pontiac GA with a similar problem)

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