Hi Friend,

I'm working on a 2009 Chevy Express van. The battery died and lost the Vtd password in the ECU. The security module is happy with the keys I reprogrammed. But theft light is on and engine won't crank.

I used CK100 to learn the keys but I don't think the computer relearned the password. In the chevy manual, it's called Vehicle Theft Deterrent Learn, ECM or PK3 Replaced.

What scanner can do this relearn? Or does anyone know where the offsets are in the eeproms so I can do this manually?