how does the ignition key cylinder come out? i followed instructions posted by Vikki last year that i printed out.my key cylinder has never been changed as i had to remove the casting over the slot,do all you have to do is depress the tap inside the slot with the key turned in run and pull? or does the two brass contacts shown in pic beside the slot have to come out too ?,if so how does it come out?.asking because they seem to me to be moving with the cylinder as i wiggle it.Vikki posted the instuctions direct from the pontiac service manual.would be nice if all my locks used the same key.thanks