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2003 chevy trailblazer_ltz
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8 Posts
Discussion Starter · #1 ·
Hey everyone,

I got gas Saturday morning (only got it to about 3/4 of a tank, had to get going) and that night the SES light came on.

Now I have been told that if you don't tighten the gas cap that it can cause it to come on.

Well this happened also last saturday, and I tightened it, and it went off, but after driving all day.

So, my question is, how long does it take for the computer to check the fuel system to make sure it's sealed, and should I consider getting a new gas cap?

Thanks!
 

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2003 chevy trailblazer_ls
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5,268 Posts
it does not check all the time...
certain conditions need to be met for this 'check' to take place.

I dont recell exactly- but it may be something like X number of cold engine key cycles.
 
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