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My '04 Chevy Z71 stutters/shakes at 50-55mph...? need help.

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Old May 5th, 2008, 8:44 PM
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Default My '04 Chevy Z71 stutters/shakes at 50-55mph...? need help.
Iown a 2004 Chevy Silverado Z71 Crew Cab...everything stock. A few days ago I had my radiator taken out to get cleaned and right after I had it put back on I left my house and hit the expressway....this is when my truck started to stutter/shake at 50-55mph...since then i have replaced all the spark plugs but the problem is still there...what can it be? could it have resulted from the radiator situation? please inform.
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Old May 6th, 2008, 3:46 AM
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Default RE: My '04 Chevy Z71 stutters/shakes at 50-55mph...? need help.
#1 suspect is the fuel filter in the tank. #2 THE FUEL FILTER ON THE FRAME.
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Old May 6th, 2008, 9:55 AM
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Default RE: My '04 Chevy Z71 stutters/shakes at 50-55mph...? need help.
Could be the EGR valve most likely.
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Old May 6th, 2008, 10:59 AM
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Default RE: My '04 Chevy Z71 stutters/shakes at 50-55mph...? need help.
what i dont get is WHY...at 50-55mph ONLY?
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