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
STEP 1:
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’
FUEL/DOD/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
NOTE:
MPM Plug will do ECM, TCM, some fuel pump module, but no BCM, it doesn’t do BCM’s.