Got a 2018 Silverado Gas 5.3 I cant read the Ecm liked its locked. Have MPVI Pro 4.10.7. Reads my 17 no problem what needs to be done. It is all stock. Do I need to update it? Really dont want to update it for fear of it not working afterwards.
Got a 2018 Silverado Gas 5.3 I cant read the Ecm liked its locked. Have MPVI Pro 4.10.7. Reads my 17 no problem what needs to be done. It is all stock. Do I need to update it? Really dont want to update it for fear of it not working afterwards.
Last edited by wildfan1976; 4 Weeks Ago at 01:22 PM.
I think you're going to need an MPVI2 or 3.
EFI specialist
Advanced diagnostics, tuning, emissions
HPtuners dealer and tech support
email=[email protected]
What I dont get why my 2017 it reads it just fine and the 18 it wont. They both have E92a controllers. The 17 is an 8 speed and the 18 a 6 speed.Originally Posted by edcmat-l1
What does it say when you try to read it? Post a screen shot.
EFI specialist
Advanced diagnostics, tuning, emissions
HPtuners dealer and tech support
email=[email protected]
Covert seed to key failed.
All the factory tunes are technically locked. GM re-uses the same seed and key a lot, but eventually they change them. The ECM (E92A) itself doesn't matter. Looks like they changed the seed and key between 2017 and 2018. HPT cracks the ECMs and saves the list of seed and key combos. Your seed cannot be found. Time to upgrade.
Here is some more info.
https://www.unlockmyecu.com/what-is-a-tuner-locked-ecu/
A standard approach will give you standard results.
My Tuning Software:
VVE Assistant [update for v1.5]
MAF Assistant
EOIT Assistant
Reply With Quote