jon1178 Posted February 15, 2011 Report Share Posted February 15, 2011 Just picked the truck up from the dealership. I had to get both knock sensors replaced because of corrosion. Thankfully still under warranty it was a $648 repair. I noticed on the way home in the higher rpm range I am hearing a whining sound almost like a vacuum but only in the higher rpm range when getting into the throttle. Anybody have this after the repair? I plan on calling the dealership first thing in the morning. Quote Link to comment Share on other sites More sharing options...
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