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Tech2 - can?t ?Relearn VIN? for locked OEM radio replacement?

Neverest

Full Member
Joined
Aug 25, 2019
Messages
11
Not sure if this is the proper forum.  OEM replacement radio from same year (?04). Navigate thru Tech2 (clone) menu and after selecting the ?Relearn VIN? option and receiving a couple of ?Onstar not present, etc.) messages and finally selecting the erase auto-theft... prompt, it pauses and then displays ?Loss of Communications With Vehicle...??

Repeated this process several times with same result.

Repeated this process on my ?05 Avalanche with same results?

I know it is communicating with the vehicle because I could read/reset DTCs, retrieve other information,  etc.

Any clues or another approach?

Thanks...
 
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