2010 Cadillac CTS4 3.0L sedan

I’m dealing with a CTS with no communication issues and no start I have 120ohms between pins 6 and 14 on the DLC when I disconnect the fuel pump control module in the trunk it goes up to 7.4 KOhms when I jump the positive and negative high and low speed GMLAN wires on the fuel pump control module it drops down to 0.95 Ohms I thought the car would start at this point help please
 

As I'm sure you know, the network contains two 120 Ω terminating resistors. One at each end of the network. With two 120 Ω resistors, in parallel, the total resistance of the network should be 60 Ω. A reading of 120 Ω Indicates that there is an open, somewhere, in the network. According to the diagram,
 
one of the resistors is external, and downstream of the Fuel Pump Control module.
The other is in the ECM. Since you can see the change when you disconnect the fuel pump control module, the external resistor downstream of the Fuel Pump Control module is not the resistor that is missing. This means that the resistor in the ECM is the one that is missing. This could be due to any module between the DLC and the ECM being disconnected, or a break in the wiring harness.

The problem could be anywhere in RED.
 

Check to make sure all of the module connectors are completely fastened.