Back after driving the car all day for about 1000km on Tuesday. No start problems anymore so the system seems to work fine with the yellow wire being cut. Toggling the security light on and off is a bit of a hassle as you have to have it in the off position before the engine is shut off. I am going to see iif there is another way of bypassing the system. Maybe a small relaymay do the trick.
I am posting another messgae as a new thread as now I have a new problem with the hi/low beam switch on the steering column.
Seems like my Impala at 89000km is falling apart. Thanks GM.
Again thanks to all who responded