CLICK THE LINK FOR THE INSTRUCTIONS FROM HPTUNERS: How to install the new GM E41 ECM Upgrade Kit | HP Tuners
- CONNECT YOUR MPVI3 DEVICE TO THE OBD2 AND IF YOU HAVE A 2017-2018 INSTALL THE HP TUNERS E41 UNLOCK KIT
- Open VCM Editor and Get a copy of the stock read.
- Send the stock read and the SERIAL NUMBER from your MPVI3 to calcotuningmx@proton.me (We need this EVERY TIME, failure to deliver will result in a delays for file service)
- Make sure you have at least 6 credits on the MPVI3
- Once you receive the MOD file, flash it by following the HP Tuners instructions.
- After the Flash is complete you need to install the FISH TUNING E41 Plug Kit for 17-19 or FISH TUNING E41 Plug Kit for 20-23
- You now need to perform resets using either your diagnostic tool (Snap-on, etc) or you can connect to the truck with a J2534 box (Nexiq USB Link w/
- OBD2 Connector works perfectly).
- Setup an account with ACDelcotds.com and purchase 1 light duty subscription for the truck- the 3 day sub should be sufficient.
- Download and install techline connect
- Connect to the obd2 port with your J2534 connector and ensure your specific connector is selected in Techline Connect.
- Reset ALL Emissions data listed.
- Then unplug DEF Injector and EGR
- If your DEF Quality sensor is bad, unfortunately you have to replace it
- You need to unplug all of the EGR Components (See Pictures Below)
- These trucks are unique in that any time the fuel/air ratios are thrown off (Bad MAF or MAP Sensor, or Injector Pigtails go bad, these trucks will throw a Service Emissions Message. Check for codes, do your due diligence and diagnose the problem- TUNING IS NOT THE CAUSE.
- You will have to reset the Emissions system again upon completion of repairs.
- WE STRONGLY ADVISE YOU HAVE YOUR CUSTOMERS KEEP SPARE INJECTOR PIGTAILS IN THEIR GLOVE BOX- THEY GO BAD ALL THE TIME!!!
- Injector pigtails: SINGLE PIGTAIL or a SET OF PIGTAILS