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  1. BrentB

    L5P monitor or ??

    So, bought my first Duramax this year (don't know what took me so long) and I love it. I took it in for it's first service this week and had an issue I brought up with the guys at the dealership. Most of the time I get ~22mpg on this highway I travel. Occasionally, it goes down to about 13mpg on...
  2. BrentB

    Howdy from Central Texas

    Been lingering for a while, but having an issue with my truck, so decided to join in and look for some help.
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