One of our customers has figured out how to delete or disable Active Fuel Management (AFM) on a 2014 GMC Sierra 1500 with MPM ECU Tuning tool, working 100%
Follow 5 steps below:
BEFORE STARTING, MAKE SURE THAT YOU HAVE A BATTERY MAINTAINER IN THE CAR, YOU NEED CONSTANT POWER TO MAKE THIS READINGS AND WRITING, DO NOT RISK BRICKING THE ECM
Hit MPM PLUG in PCMTUNER software, once it opens. click on read ( see picture below)
Check: How to install and activate MPM Plug software?
STEP 2: hit Gather info, and then Read.
will give you the option to read transmission, ECM, and CCM. just go for the ECM to do this.
STEP 3: SAVE ALL ORIGINAL DATA, ONLY THEN:
Click on ‘engine’, then go to fuel, and change DOD to ‘Disable’
STEP 4: hit ‘Write’
STEP 5: choose ‘write calibration’ on the prompt and hit write. wait until is done and take it for a ride to check it out
MPM Plug will do ECM, TCM, some fuel pump module, but no BCM, it doesn’t do BCM’s.