Trying to complete an e-fan swap on a 2004 Avalanche 5.3, using Windows 10 and a MPVI3
I was finally able to successfully read the ECU by removing the radio amp fuse and unchecking Use High Speed.
I activated the fans, set the temps, and tried to write the flash. Got an error: Control Unlocker: Timed Out
Now, my truck wont start.
Is the ECU bricked?? How to resolve this??