Gas line leak

  • 1 POST
  • 4.2L
  • V6
  • AWD
  • 200,000 MILES

Noticed my "service engine soon" light come on the other day so I checked it out and I got a P0442 code (small emissions leak). Also noticed the cabin started to smell of gasoline. Put the trailblazer up on the lift today and I think I found a small gasoline leak. In the attached picture, I believe the leak is coming from the line labeled number four. Either at the bend at the end of the line (of the picture) or the bend where number three is pointing. (Cannot remember exact spot) It looks as if the line rusted against the floor pan on the drivers side. I have a multitude of questions but don't know exactly where to start. Is this line hard to replace? Is there a part number? Approximate price? Any information about this type of fix will help! Thank you!

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Saturday, November 19th, 2016 AT 7:09 PM

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  • 2,537 POSTS

I would recommend you take it in to the dealer. There is an extended warranty for a fuel leak that may or may not apply. Here is what the bulletin says.

14423A: Special Coverage Adjustment - Fuel Tank Inlet Check Valve Fracture - (Dec 14, 2015)

Subject: 14423A - Special Coverage Adjustment - Fuel Tank Inlet Check
Valve Fracture

Models: 2004 Buick Rainier
2003-2004 Chevrolet SSR
2002-2004 Chevrolet TrailBlazer, TrailBlazer EXT
2002-2004 GMC Envoy, Envoy XL
2004 GMC Envoy XUV
2002-2004 Oldsmobile Bravada
This bulletin has been updated to revise the Part Information section. Please discard all copies of 14423.

Vehicles involved in Special Coverage 07099 have been transferred to Special Coverage 14423. Special Coverage 07099 has been closed.


Some 2004 model year Buick Rainier, 2003-2004 model year Chevrolet SSR, 2002-2004 model year Chevrolet TrailBlazer, Chevrolet TrailBlazer EXT, GMC Envoy, GMC Envoy XL, and Oldsmobile Bravada, and 2004 model year GMC Envoy XUV vehicles contain a fuel tank inlet check valve (ICV) that could fracture. The ICV is located above the full fuel level. A fractured ICV could allow fuel vapors to pass through and droplets of fuel to accumulate on the side of the fuel tank as it passes over the fracture during refueling. If the ICV fractures, the vehicle's Service Engine Soon (SES) light may illuminate, and the owner may notice a fuel odor and/or a few drops of fuel on the ground when refueling the vehicle.

Special Coverage Adjustment

This special coverage covers the condition described above for a period of fifteen years or 150,000 miles (240,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership.

Dealers are to replace the fuel tank. The repairs will be made at no charge to the customer.

For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after November 2, 2015, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to November 2, 2015, must be submitted to the Service Contract provider.

Vehicles Involved

All involved vehicles are identified by Vehicle Identification Number on the Applicable Warranties section in GM Global Warranty Management system. Dealership service personnel should always check this site to confirm vehicle involvement prior to beginning any required inspections and/or repairs. It is important to routinely use this tool to verify eligibility because not all similar vehicles may be involved regardless of description or option content.

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Saturday, November 19th, 2016 AT 9:53 PM

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