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  1. Colorado Diesel Mechanical
    Just purchased 2016 2.8 Duramax Z71 with 133,000 miles. First trip out of town yesterday, no load or trailer. Halfway up a steep grade, "reduced power" warning displayed along with check engine light. I pulled over within a mile & shut off truck for 5 minutes. Warning disappeared but check...
  2. Colorado Diesel Mechanical
    Looking for some advice on the above two issues with my 2016 Colorado Z71. I purchased used in Sept. '19 and the truck already had 90k miles logged. I noticed the hissing noise associated with the turbo a couple months ago. From what I've read it's likely a bent fin. The deal with the...
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