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Showing results for tags 'dfco'.
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Hello Guys, i have registered new to this board. I've read much in the past but haven't been active here. I bought this year a ´17 Black Silverado HC with the awesome 6.2 V8 and the 8 spd tranny. Georgeos Truck - best vehicle i've ever driven. I put some Pics here later. I got a question - probably someone can give me advise or tell me its just normal. My DFCO (deceleration fuel cut off) kicks in very incosistently. Once the engine is warmed up i will activate for the first decelerations when i let off the throttle. But after a few minutes most of the time it won't kick in again. Sometime i think it is about ambient temperature - when it was colder it was also less often. When at highway speed it literally never activates. I have no clue why. I have no check engine lights or other issues. Regards and thank you in advance for everything which help me to determine the problem