HELP with removing DEF/ urethra injector for replacement
I have a 12 LML that is showing Exhaust fluid quality poor message and at this point I'm limited to 55 MPH so driving a borrowed vehicle.
I took it to a shop since I haven't been able to clear that message I've done the RFQT test a few times and always fails I ran through the full battery of tests where I do a service regen then the RFQT but it still fails. The downstream Nox sensor is normally about 70% less (120 UP and 30 down) but its still failing.
Mechanic thinks issue is with the Def injector the stream might not be clean / good shop was closing so I just ordered one from Rock auto waiting for it to arrive today but the Magical question is how do you remove the injector so I can try and actuate the injector outside the vehicle to see if it is truly bad or not. The below picture shows how I removed the locking plate. I've tried to twist and pull but the injector isn't coming out am I missing a release spring or something?
There were some ECM updates that were also done but still no change.
I just want to remove the injector and test it to see if it is actually spraying. I can disconnect the line and actuate the pump and it will pump out the fluid no issues.
I'm open to ideas on how to remove this or what else i can try / do. I do have a hand held scanner that can do everything the Tech 2 is able to do.
2012 Chevy Silverado 2500 Silver.
aFe Power Magnum FORCE 51-11922 CIA
Everything else stock