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5 Posts
So I don't understand the def/dpf system in my 19 Colorado duramax. In other equipment/older trucks I always would receive a light on dash and you could hear the exhaust screaming when going into regen but in my 19 I have only ever noticed it doing regen well at idle. When it regens its after about 15 minutes of idleing for 2 or 3 3 second burps...never noticed it well driving..just wanted to make sure its normal because reading people's threads it makes me question.. thanks