hearing a noise from under truck after turning it off
when a can is left in full sun its makes a popping noise, that's the sound I am hearing from under my 2002 Chevy Silverado 2500 HD series, after I shut it off. - As of last night there is a high pitched shrill sound coming from my gas tank when I am idleing, its driving me crazy, what could be happening?
The pinging is probably the exhaust contracting and expanding. The shrill you hear is probably the fuel pump ready to fail.
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