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Old 01-10-2007, 06:16 PM   #11
toms68cst
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Join Date: Jun 2000
Location: Bismarck, ND
Posts: 4,300
Re: Mystery gas tank noise

Forgive me for stating the obvious but you can hear the gas itself sloshing around if the gas tank is about 1/2-3/4 full. Sometimes the gas in my truck really slaps the sides of the tank. If it's someone new to our trucks it may be unexpected.
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Unrestored 68 C-10 CST. Original 327. 4-Speed CH465. 50k or so miles.

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