Rpms Fluctuating At 40-55 MPH and shakes

Asked by Nov 01, 2017 at 05:02 PM about the 1998 GMC Sierra C/K 1500

Question type: Maintenance & Repair

My truck had been running fine I replaced my Spark Plugs
and Wires did a tire rotation replaced the knock sensor
and it still does it. I don’t know what to to anymore help

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