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1992 GMC knock noiseShariNorman 09-24-2007, 08:53 PM My 1992 GMC has a knock noise when accelerating. Help! twistedthumper 11-23-2007, 01:43 AM does it have the knock at idle? it could be a sparkplug pingin against the piston or a valve opening to far or not closing. vBulletin®, Copyright ©2009, Jelsoft Enterprises Ltd.
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