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 ...
Forum Discussion
ksss wrote:
OnStar will tell you what your code is as well if you have it. You want to make sure you check it soon as it will cycle out of the computer and it will be lost.
Even if the CEL does go out with key cycles, it is stored in the ECM until it is read & erased with a reader.
