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Old 10-01-2009, 10:38 PM   #1
GMC Guy
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Join Date: May 2009
Location: Sparks, NV
Posts: 913
Bad Vibrations...

so i took my truck on a 3 hour road trip this weekend to see a brad paisley concert. other than it being over 100 degrees out, the truck cruised fine at 75 the whole way and back. but as i got off the free way coming home, i noticed it was running pretty rough. so i got it and checked everything out, but the past few days it has been shaking at idle and acceleration up to about 30 mph. all the wheels are balanced, tires inflated, all the obvious causes are ok. any ideas of what it could be? i hope i don't start replacing parts that aren't causing it...
any help is always appreciated.
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Greg
1974 GMC
1/2 Ton SWB Fleetside
L33 5.3/4l65e

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