I have a 2021 GMC Elevation DURAMAX 3.0..... Around 7K on it.... After all being okay, suddenly the DEF gauge started to act weird. It happened after it gave me a low warning. After that and before putting DEF in it, the gauge showed half tank. Decided to fill one jug (2.5 gal), did not move........ After several miles now it was showing full!! Very frustrating. Decided to put the other 2.5 gal in it. It has been 2k miles and still showing full...... Took it to dealership and this is their response: "NO PROBLEMS FOUND, CONDITION IS NORMAL; DEF CONSUMPTION DEPENDS ON ENGINE LOAD, FUEL USAGE, HUMIDITY TEMPERATURE AND IS NOT MILAGE BASED. DEF SYSTEM WARNING WILL APPEAR SHOULD AN ERROR OCCUR"
So how is it that before, that DEF gauge will show different levels as the miles grown and now is not? Is GM Tech just giving me some quick response so to not troubleshoot the fault?
Thanks
