Check the tank near the fuel filler inlet for streaks from leaking fuel. It may be a defect covered by a special extended warranty. Here's the TSB on this. Check what is BOLD for the coverage period as your 2003 may be on the edge of getting cut off depending on when it was put into service:
Subject: 07099A -- SPECIAL COVERAGE ADJUSTMENT - FUEL TANK INLET CHECK VALVE FRACTURE
Models: 2002-2004 CHEVROLET TRAILBLAZER EXT
2002-2004 GMC ENVOY XL
2004 GMC ENVOY XUV
This bulletin cotains a revised service procedure and claim information. Discard all copies of bulletin 07099, dated June 2007.
Some customers of 2002-2004 Chevrolet TrailBlazer EXT and GMC Envoy XL, and 2004 GMC Envoy XUV vehicles may comment on an SES light illumination, which may be accompanied by a fuel odor, and/or a few drops of fuel on the ground when refueling the vehicle. This may be caused by a fracture of a weld on the fuel tank inlet check valve (ICV). The ICV is located above the full fuel level. A fracture in this area may allow fuel vapors to pass through and allow droplets of fuel to accumulate on the side of the fuel tank as it passes over the fracture during refueling.
Special Coverage Adjustment
This special coverage covers the condition described above for a period of 10 years or 150,000 miles (240,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. 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 June 8, 2007, 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 June 8, 2007, must be submitted to the Service Contract provider.
Involved are certain 2002-2004 Chevrolet TrailBlazer EXT and GMC Envoy XL, and 2004 GMC Envoy XUV vehicles built within the following VIN breakpoints:
Year Division Model From - Through
2002 Chevrolet TrailBlazer EXT 22442652 - 22460353
26100010 - 26138714
2003 Chevrolet TrailBlazer EXT 32100002 - 32229743
36100001 - 36246835
2004 Chevrolet TrailBlazer EXT 46100116 - 46119631
2002 GMC Envoy XL 22437217 - 22460354
26100018 - 26138713
2003 GMC Envoy XL 32100013 - 32191834
36100011 - 36246828
2004 GMC Envoy XL 46100127 - 46119624
2004 GMC Envoy XUV 46100001 - 46116824
Parts required to complete this special coverage are to be obtained from General Motors Service and Parts Operations (GMSPO).
Part Number Description Qty/ Vehicle
15229310 Tank, Fuel 1
15034832 Seal, Fuel Sdr (O Ring) 1
General Motors will notify customers of this special coverage on their vehicles (see copy of typical customer letter included with this bulletin - actual divisional letter may vary slightly).
Inspect the fuel tank for a leak at the fuel tank inlet check valve (ICV). Refer to Fuel Tank Leak Test in the Diagnostic Information and Procedures section of SI, if required.
• If a fuel leak is present at the fuel tank ICV, replace the fuel tank. Proceed to Step 2.
• If no fuel leak is present at the fuel tank ICV, no further action is required.
Replace the fuel tank. Refer to the appropriate service procedure in SI.
For vehicles repaired under the terms of this special coverage, submit a claim with the information indicated below:
Inspect Fuel Tank - No ICV Fracture Found
Inspect and Replace Fuel Tank
Customer Reimbursement (Canadian & Export Deaers/US CAC)
* The "Parts Allowance" should be the sum total of the current GMSPO Dealer net price plus applicable Mark-Up or Landed Cost Mark-Up (for Export) for the fuel tank needed to complete the repair.
** The amount identified in the "Net Item" column should represent the customer reimbursement amount.
Customer Reimbursement - For US
All customer requests for reimbursement for previous repairs for the special coverage condition will be handled by the Customer Assistance Center, not by dealers.
A General Motors Customer Reimbursement Procedure and Claim Form is included with the customer letter.
Important: Refer to the GM Service Policies and Procedures Manual, section 6.1.12, for specific procedures regarding customer reimbursement and the form.
Customer Reimbursement - For Canada and Export
Customer requests for reimbursement of previously paid repairs to correct the condition described in this bulletin are to be submitted to the dealer prior to or by June 30, 2008. Repairs must have occurred within the 10 years of the date the vehicle was originally placed in service, or 240,000 km, whichever occurs first.
When a customer requests reimbursement, they must provide the following:
• Proof of ownership at time of repair.
• Original paid receipt confirming the amount of unreimbursed repair expense(s) (including Service Contract deductibles), a description of the repair, and the person or entity performing the repair.
If the work was done by someone other than a GM dealership, the amount of reimbursement will be limited to the amount that the repair would have cost GM to have it completed by a GM dealership.
Dear General Motors Customer:
As the owner of a 2002, 2003, or 2004 model year Chevrolet TrailBlazer EXT or GMC Envoy XL, or 2004 model year GMC Envoy XUV, your satisfaction with our product is very important to us.
This letter is intended to make you aware that some 2002, 2003, and 2004 model year Chevrolet TrailBlazer EXT and GMC Envoy XL, and 2004 model year GMC Envoy XUV vehicles may have a condition where the Service Engine Soon (SES) light may illuminate, which may be accompanied with a fuel odor, and/or a few drops of fuel may fall on the ground when refueling the vehicle. This may be caused by a fracture of a weld on the fuel tank inlet check valve (ICV). The fuel tank ICV is located above the full fuel level. A fracture in this area may allow fuel vapors to pass through and allow droplets of fuel to accumulate on the side of the fuel tank as it passes over the fracture during refueling.
SES light activation does not necessarily indicate a condition due to the fuel tank ICV fracture. Except when SES light activation is accompanied by the additional conditions mentioned (i.e., fuel odor and/or a few drops of fuel on the ground during refueling), please consult your Owner’s Manual.
Do not take your vehicle to your GM dealer as a result of this letter unless you believe that your vehicle has the condition as described above.
What We Have Done: General Motors is providing owners with additional protection for the fuel tank ICV. If this condition occurs on your 2002, 2003, or 2004 model year Chevrolet TrailBlazer EXT or GMC Envoy XL, or 2004 model year GMC Envoy XUV within 10 years of the date your vehicle was originally placed in service or 150,000 miles (240,000 km), whichever occurs first, the condition will be repaired for you at no charge .
What You Should Do: Repairs and adjustments qualifying under this special coverage must be performed by a General Motors dealer. You may want to call the service department at your dealer to find out how long they will need to have your vehicle so that you may schedule the appointment at a time that is convenient for you. This will also allow your dealer to order parts if they are not already in stock. Keep this letter with your other important glove box literature for future reference.
Reimbursement: The enclosed form explains what reimbursement is available and how to request reimbursement if you have paid for repairs for the special coverage condition.
If you have any questions or need any assistance, just contact your dealer or the appropriate Customer Assistance Center between the hours of 8:00 AM and 11:00 PM, EST, Monday through Friday. They can be reached at the number listed below.
Text Telephones (TTY)
Puerto Rico - English
Puerto Rico - Español
We are sorry for any inconvenience you may experience; however we have taken this action in the interest of your continued satisfaction with our products.
Customer and Relationship Services