Forum Discussion
JoeTampa
May 16, 2016Explorer
Chevy says:
"Maintaining Def Quality
The quality of DEF in the tank must be maintained for the vehicle to run correctly. Care should be taken to prevent any contaminants from getting into the uid. Only GM-approved DEF, or DEF fluid containing the API certifed or ISO 22241 label, should be used."
https://www.chevrolet.com/content/dam/Chevrolet/northamerica/usa/nscwebsite/en/Home/Ownership/Manuals_and_Videos/02_pdf/SilveradoHD_DEF.pdf
"Maintaining Def Quality
The quality of DEF in the tank must be maintained for the vehicle to run correctly. Care should be taken to prevent any contaminants from getting into the uid. Only GM-approved DEF, or DEF fluid containing the API certifed or ISO 22241 label, should be used."
https://www.chevrolet.com/content/dam/Chevrolet/northamerica/usa/nscwebsite/en/Home/Ownership/Manuals_and_Videos/02_pdf/SilveradoHD_DEF.pdf
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