DEF when towing
What is your usage of DEF when towing. I have a 2020 GMC 3500 sierra 6.6 Duramax diesel. I have 17000 miles on it now. Most of the miles are regular driving hardly use any DEF. Had my truck servic...
Forum Discussion
just picked up truck from Dealer. Could not find anything wrong with my DEF system. GM did issue an article revised February 3rd 2022 on Excessive Diesel Exhaust Fluid. The gauge is only a reference and may need several key cycles to show actual amount in tank. The rate of DEF will vary on Temperature, Altitude, speed and load. So the harder engine works the more DEF.
They Also stated as the NOx reduction requirements increase the more the newer vehicles will use. I guess 2020 was a reduction requirement year.
Article also states that if you receive message of XXX amount of miles that may not be accurate as well. It could decrease or increase depending on conditions and load of engine.
They Also stated as the NOx reduction requirements increase the more the newer vehicles will use. I guess 2020 was a reduction requirement year.
Article also states that if you receive message of XXX amount of miles that may not be accurate as well. It could decrease or increase depending on conditions and load of engine.
