I have a 2019 silverado 5.3l l84 got a lifter failer at 97000 out of warranty i order a delete kit from AMS Racing, labor wise is not bad just a pain if you are doing the labor while the engine is in the truck few cuts here there but its part off the job. i got mine put back together, but having issues disabling the DFM. delete kit came with a diablo sport 3 intune to unlock the ECM and TCM, have tune the truck but i cannot disable the DFM it gives me the option to disable it but will not display it as disabled. any ideas why its doing that?
