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Manage My Life

Noise from gas tank (metal expansion)

by Manage My Life Last activity date:
March 10th, 2012

2002 GMC 2500 SLE with extra large gas tank (46 gallon). Makes a banging sound a few minutes after stopping a vehicle and turning off engine. It used to rarely do it an now I hear the sound sometimes when driving down the road. I do have a locking gas cap. At least I think the sound is coming from the gas tank. However I could not rule out catalytic converter or muffler.

Tags:
Automotive
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Answers (4)
Joseph Perez
I strange noise coming from the vehicle can really cause some concern and I will be happy to help. I am adding two links below that describe a similar question. I hope this helps while you wait for your expert response.
Answered in 11 minutes
by Joseph Perez
March 10th, 2012
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