Alright - this issue got resolved. My vehicle manager was confirmed bad by the dealership. Purchased new vehicle manager(1200 USD), truck fired up but still code 5G and 5J instead of 57. Upon checking all the wiring, everything tested perfect from point A to point B, 0.5Ohms. The trouble was a bad pin on the connector to the lift amplifier for the CAN Bus signal(strange for this). The connector itself is all black plastic with a "red" push on connector housing. You can remove this housing to inspect the pins. We replaced the connector/housing and all the pins, dipped each pin in dielectric grease and plugged it back in. Truck runs fantastic now.
-Relays + relay card were good.
Hope this helps anyone in the future.
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