2005 Chevrolet Silverado Vibration in front end.

2005 CHEVROLET SILVERADO
179,000 MILES
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CNV8079
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I have a 2005 Chevy silverado when I get to 70 mph there is a slight vibration
In the steering. This vibration will get worse. If I hit the brakes to slow down it becomes a violent vibration. Then when the truck is slowed down under 20 mph the vibration goes away. Recently I have found that when the vibration happens that when at speed if I hit the brakes the vibration will fade away. I have had the tires balanced and rotated, I have had 3 mechanics check out the front end they say everything is tight. Of course the does not happen consistently.
Jun 13, 2013 at 1:17 PM
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CARADIODOC
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What you're describing can be caused by a warped brake rotor, (lateral runout, not thickness variation that you would feel in the brake pedal), and it can be caused by a caliper that is not fully releasing, typically due to a restriction in one of the rubber flex hoses. With the truck raised up in front, look for a wheel that's fairly hard to turn by hand.
Jun 14, 2013 at 9:37 AM