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Old 08-25-2020, 10:01 AM   #26
hatzie
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Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,915
Re: Low power on 2001 6.0

The dealership shops are usually full of parts changers.
Sounds like your mechanic is not much better.

Take it to someone that will actually diagnose it. Don't clear the codes in the ECM. It makes it a lot more difficult to get a read on what's happening.
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RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
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