What happens if DEF tank does not clear?
What happens if DEF tank does not clear? After a normal DEF tank fill, the DEF fluid level reading (on Tech 2) should have increased to 100%. If fluid was added and the level does not change, the DEF fluid may be frozen. The fluid will have to be thawed before completing the process in this PI. A reading of 100% does not indicate that the entire tank is thawed. What does Def fluid tamper mode on GMC mean? (Service Exhaust Fluid System-see owner's manual now) A DEF Fluid Tamper mode - Tamper mode is for conditions associated with an...