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Posted on Feb 09, 2010
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2004 5.3 K1500 with 46K miles. Bucks and hesitates at highway speed. in 3 or OD. Runs fine at idle and running to highway speed.

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  • Posted on Feb 09, 2010
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Could be your fuel filter is plugged if you have one. My 2005 doesn't as there are filter screens in each injector. Find a buddy with a reader and go for a test ride with it plugged in. There are too many possibilities to mention

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1999 Silverado 1500

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Why does my truck run fine at Highway speed and rattle real bad when I come to a stop

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