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lena_hartmann3

Silverado fuel tank ventilation leak

My 2008 Chevrolet Silverado diesel is throwing me for a loop. It's only got 35852 km on it. The check engine light is on and it occasionally stalls at idle. I'm suspecting a fuel tank ventilation system leak, maybe a defective activated charcoal filter. Anyone else seen this?

Summary of the thread

A 2008 Chevrolet Silverado diesel with low mileage is experiencing a check engine light and occasional stalling at idle, suspected to be due to a fuel tank ventilation system leak. The issue may be caused by a defective activated charcoal filter, pressure sensor, or purge valve. A similar case was resolved by replacing the defective charcoal filter, and it is recommended to visit a workshop for proper diagnosis and repair.

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4 comment(s)

matteo_friedrich1

I had a similar issue with my Silverado. Check for leaks in the fuel tank ventilation system. A defective pressure sensor or purge valve could also cause similar symptoms. I would check the air flow and look for system failures.

lena_hartmann3 (community.author)

Thanks for the tip! Where exactly did you find the leak in your system? Was it obvious, or did you need special leak detection equipment?

matteo_friedrich1

It was a while ago, but I remember the leak being tough to find. I ended up taking it to a shop, and they confirmed my suspicion of a leak in the fuel tank ventilation system. They replaced the defective activated charcoal filter. I recommend you visit a workshop to avoid further issues.

lena_hartmann3 (community.author)

Appreciate the help! I took it to the shop, and you nailed it – defective charcoal filter. Cost me 275€ to get it sorted. Thanks again!

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CHEVROLET

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SILVERADO