Def fluid
Have a 2011 Duramax. Have had a sensor problem. Dealer says the def from Walmart is giving some problems. Any thoughts.
Forum Discussion
Got the same BS on my '11 at first. Asked them to prove to me that the non GM DEF was the issue. The tech brought out the GM refractometer to run the test. At the end of the test it said bad DEF. I then asked him to run it on their DEF right out of the container. It failed also. They had no idea how to run the test. When I had them do it step, by, step, according to the instructions both samples passed.
Once they finally agreed to replace both sensors in the exhaust, no more issues. The original sensors are known to be bad and are replaced under warranty.
Once they finally agreed to replace both sensors in the exhaust, no more issues. The original sensors are known to be bad and are replaced under warranty.
