Question about 2002 Chevrolet TrailBlazer

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Gas leak on top part of the engine chevy trail blazer 4.2 it looks like a lilttle fuel filter and it has a small vaccum hose that comes off of it cant find anything about what the part is called

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  • Chevrolet Master
  • 5,278 Answers

If it is on the fuel rail, it sounds like the fuel pressure regulator. Pull the vacuum hose off it and check for evidence of gas there. There should be no gas in the vacuum line, but if there is, it is a failed regulator. If the gas is coming from where the regulator sits, the o-ring is probably bad. Pull the device off and check the o-ring, and replace it with a new one.

Posted on Dec 30, 2012

Testimonial: "thats what it is thank you very much very help full "

  • 1 more comment 
  • jkazyaka
    jkazyaka Dec 30, 2012

    it sits right behide the altnator and it looks like a little filter and the vaccum line goes up to the big plastic piece that sit on top of the coil packs

  • montehammons Dec 30, 2012

    Not sure. Don't know what that would be. Not even sure what the plastic on top of coil pack is. Have someone there look at it to verify if it is the pressure regulator or not.

  • jkazyaka
    jkazyaka Dec 30, 2012

    thats what it is pressure regulator it filling up with gas thank you

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Posted on Jan 02, 2017

old marine
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SOURCE: 2000 chevy cavalier having coolant leak. Found a

That hose is the drain hose for the air conditioner evaporator. If it is leaking coolant, there's a good chance that your heater core is leaking, as it is in the same 'box' that the air conditioner evaporator is in. You'll need to replace the heater core.

Posted on Apr 24, 2009

outdoorsman5
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SOURCE: Vaccum hose diagram for 97 chevy tahoe 5.7 liter

I have the diagram you need. If you send me your email I will scan it off and send it to you. outdoorsman592003@gmail.com

Posted on Sep 12, 2009

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