Soooo just had the 203b code pop up, reductant level performance sensor… if someone could please help. Which actual thing do i gotta replace, is it the reductant def pump , or the actual def heater pump I’m not sure where the sensor is actually located… any suggestions ?? It’s a 2013 LML
I'm a Silverado owner, not an attorney, but I am very frustrated by the lack of response from GM so I'm looking into whether a class action lawsuit might wake them up.
I am seeking input from members that have, or had, issues with their DEF system. Problems like:
inaccurate DEF gauge readings...