Have been having problems with my CIM in my Vectra C GSi. I have already got opcom and bought a new CIM from Vauxhall with the correct part number for my registration plate. I de-paired (deleted transponder keys and reset the CIM) the old CIM, and fitted the new unit.
Entered the security code correctly which worked fine. When I went into OPCOM and into the CIM to select the 'replace/change CIM' option, it seemed to do nothing. Almost as if the function is unavailable.
I even tried to do add the transponder keys and it says programming failed.
Has anyone managed to do this yet?