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lifted06gmc

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  1. I have determined on my 06 GMC Sierra 4x4 that the rear leaf springs were the problem. I ended up loosening up the u bolts holding the leafs together to where the leafs had plenty of gap in them and i sprayed a teflon lube between each leaf. I then changed out the u bolts with new ones also new shackle bolts and bushing and tightened it all back down. The truck hasn't made a popping noise since. It has been almost a year since i done this work.
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