1997 Chevrolet Blazer Vibration

1997 CHEVROLET BLAZER
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LIONSFAN112000
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I have a 97 Chevy Blazer 4wd w/4.3litre and the mileage is at 169000. I have had the truck for a short while and don't really know any history of this truck. The problem I am having is a vibration when I am accelerating. You can feel it more when speed is around 55mph or more. When driving at higher speeds the vibration goes away when I take my foot of the accelerator. There is probably a list of things that it could be, but where should I start?
Jun 13, 2007 at 9:51 AM
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TOYPAR
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That could be ALOT of things. I would start at the drivetrain, Bent rim, wheel balance, tire pressure, tire coindition, differential , now the motor, Diagnose the igntion system could be a bad plug, plug wire, cap, rotor, coil or timing. Fuel pressure, harmonic balancer, crank pulley, tensioner pulley and idler pulley. Good luck.
Jun 26, 2007 at 9:16 AM
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MAPLELEAF_NUT
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lionsfan112000...have you had any luck troubleshooting this problem...I have the same vechicle....with approx the same milage...and also the same problem......it vibrates at around 80-90 km/h for a little while....when I cruise up at 100-110km/h...all the vibration goes away....also..when it vibrates..if I let off on the gas..it goes away..it only vibrates under power...sounds very similar to your problem. I am suspecting the transmission...but I would really like to know how you have made out at your end.
thanks
Jul 16, 2007 at 8:48 PM
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CHEVY22
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CHECK THE U JOINTS AND THE CARRIER BRG BEFORE ANY MAJOR REPAIR THE CARRIER BRG IS AT THE SLPIT OF THE FRT AND REAR DRIVESHAFT

JIM
Jul 22, 2007 at 8:27 AM
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WHATEVER987987
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check out the u joints first.. i've heard that to actually work from what sounds to be the same problem. i have the same problem now and will let u know how it goes soon as i get money to try.
Apr 3, 2013 at 2:28 PM
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ASEMASTER6371
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u joints are the first stop here. i bet one is either locked up or very loose

Roy
Apr 20, 2013 at 7:53 AM