When I open my gas cap why does a hissing noise happen?

What is your question?

This happens regardless if the gas tank is full or empty. Also when I am pumping gas the gas pump stops frequently. My check engine light has been on for over a year and the dealership stated they think it is on because I need the thermostat replaced.

How long has your 2007 Hummer H3 had this problem?

About 2 months

redbat23 in Canton MI

May 15, 2018

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What are the best Hummer repair shops?

RepairPal Certified shops can diagnose and repair your 2007 Hummer H3. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

Popular Answer

When I open my gas cap why does a hissing noise happen?

What is your question?

How long has your 2007 Hummer H3 had this problem?

About 2 months

redbat23 in Canton MI

May 15, 2018

1 Reply

Popular Answer

Kings Auto and Truck Repairon Jun 8, 2018

Sounds like maybe the fuel tank vent valve is stuck closed.Have the codes read at Auto zone to verify my hunch.

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Popular Answer

What are the best Hummer repair shops?

RepairPal Certified shops can diagnose and repair your 2007 Hummer H3. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.