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The fuel filter is a 12 dollar part. The lines connect to it by clips. If they are plastic lines(black) then they aren't fixed, but need replacing and can be costly. If it is metal then easily fixed. Being a 2004 then I would think there shouldn't be any quality of line issue unless it was damaged somehow. There may also be o-rings on the fuel filter, not sure, you'll have to check, where the lines come together. Maybe not, but check the connections first. That's the most likely spot of leakage.

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16y ago
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Q: How much does it cost to fix a leaking gas linefilter on 2004 Chevy trailblazer ls?
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