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Midwest | We serviced a '12 DuraMax yesterday. Changed the fuel filter, and in order to pump the hand primer on the filter, removed the air breather tube above the filter housing. Got it pumped up & air bled out, and then started it up without the breather tube on to make sure it ran and no leaks. Well. . . . . . now an engine emission code came up and going to de-rate the pickup in 50 miles. Assume it was because we ran the engine without the breather tube installed ? How do we "reset" it without taking to the dealer ?? | |
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Duramax de-rating
