I doubt it's got a "bad" motor. I wouldn't trust any junkyard bonehead to diagnose it. Might be worth looking into yourself. Could be an easy flip.

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Only diesels in this driveway.
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k