Car model and year: 2007 C6 Chevrolet Corvette Symptom: put my 07 base in for new harmonic balancer + a few other maint. items. I wanted to do was flash my ECU and get it back to stock. Apparently there are some applications which once applied put the thing on lockdown. Vxdiag Vcx Nano Gm Scanner I was informed: “If ur using an aftermarket tuner like hptuners and so on. The tuner locks the ecu.”. The next step is to unlock it and flash back in the stock OEM tune. Someone did a re-tune on the car, and locked the tune; which locks a tech II/MDI from working with the ECM. Note, because of this reason, most tuners will not lock an after market tune!!!! So either need to find out how did the tune to unlock it, or will need to pull the ECM, send it a third party to unlock it and flash back in the stock OEM tune. Clearing and reflashing a ECM to your car from aftermarket cost around $60, while unless you have the means to re-flash the new one, add on another $200 for dea...
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