2005 6.6 duramax check engine
I have a 2005 GMC Duramax 6.6 while recently coming home through Virginia and West Virginia on North 77 my check engine light came on after about 3 or 4 good mountain passes. Stop for the evening the ...
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The 2005 Duramax had some issues with overheating due to air restrictions in the intake design. It's possible that under your towing load that air restriction came into play and the engine was running too hot.
