GM confirmed no diode on these connectors. Separately part is available for installation.
I explained to them that not only was this connector missing the diode, but also had both wires in grey. They should have come properly wired in one black and one green for +.
Also missing was a notation of connector only on packaging and without diode.
Anyways, to heck with the GM solution I am not tearing apart the whole connection again.
I found at a local Air Cond. shop the connector with diode attached, that even came color coded ! Will cut off GM connector and solder/heat shirnk this one in place to solve this problem. Did not want to chance the diode that came off original connector, as it was too old so here is the new one with diode.