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amsoil bypass filter
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  1. 01-04.5 LB7 Duramax Powertrain
    Hey guys, so I finally got a break from the wife's ToDo list and installed my AmsOil Bypass kit and put in AmsOil full synthetic 5w-40. After getting everything installed and filled up I took it for a drive. About a mile down the road I start to hear what sounds like a pump hum that changes with...
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