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sams60gmc · 06-02-2009, 04:11 PM

Mine is pretty loud and lasts for quite a while. Kinda sounds like someone sticking a stick into the fan maybe??

06-02-2009, 04:11 PM	#13
sams60gmc Registered User Join Date: Sep 2008 Location: Vancouver Washington Posts: 726	Re: Yukon knocking noise? Mine is pretty loud and lasts for quite a while. Kinda sounds like someone sticking a stick into the fan maybe?? __________________ 1960 GMC short fleet, full frame build... http://67-72chevytrucks.com/vboard/s...d.php?t=329718