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...
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I recently filled mine to the top then towed my 35k combined load from NW WA to So cal. I filled to the top at a Truck Stop and calculated at 347mpg. My fuel consumption was around 123 gallons 9mpg.
I also can easily add a 2.5 gallon DEF at 1/2 tank.
I also can easily add a 2.5 gallon DEF at 1/2 tank.
