Viper 791XV & DEI 457G / Door Locks Inop

I have a 2004 2500 HD Chevy Duramax.

Have instaled the Viper 791XV with the DEI 457G.

I have done the programming to the 457G.

The doors do not lock or unlock.

Tryed it with & without the diode on the black ground wire. No change.

I have the dome light wire connected.

Also checked another 457G same problem.

The system remote starts fine.

What am I missing ?

Thanks Gus, I have rewired the 457G as you said. Both ground & power from the diagnostic plug.

NO change . Remote starts fine, No Lock or UnLock. Also no trigger after the door is opened.

I am almost to the point of ripping it all out and throwing it in the trash

Did you verify if PIN 2 was Purple wire at OBD Connector?

Yep I have checked the PIN 2 wire.

Yep have tryed eveything with the doors shut keys out.

The Viper will remote start the vehicle fine, just Lock / unlock function not working ?

The red (+12) wire going into the 457G ?

The red (+12) wire going into the 457G has power all the time even with the doors shut.

I may have something wired wrong, as if i use the Viper remote to lock the doors, I get the "beep" feedback from the Viper. However the dash lights flash. When I use the factory key fob to lock I do not get the dash light flash.

Tomorrow I will retrace all my connections. kind of start over ?

Well now I am confused.

I have checked & Rechecked all the wires. Everything is correct.

It is starting to really P_SS me off !