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speedometer problems

  1. 6.7 Problems Forum (2011-2016)
    I noticed when going through construction that has the radar billboards my speedometer is 3 MPH faster than reported speed. This is both northbound and southbound, at least 4 different times. Any idea of what it may be before I take her in?
  2. 6.0L Problems Forum
    OK. Pressure washed my truck. Probably got a little carried away with the water. Long story short, ended up with about a dozen different codes and a truck that wouldn't start. Opened up all the connectors that I could find under the hood and used compressed air to dry them out. Used electrical...
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