Hi Mick. I have programmed a used Pump on a Vectra C with Tech 2, I was supplied with both security codes for the vehicle and the replacement second hand pump, I Reset the pump using its own Code and Reprogrammed it to the car using the vehicles own code.

I was also told that it is not possible to reset the pump due to a mismatch of security codes, But it worked for me.

I assume its the PSG 16 Style pump/engine ecu with the 2 multiplugs. ??

H.T.H. Tony.