2013 Yukon Hybrid Front Differential

[General601]

Is anyone aware of how to find my identifier on the differential by using my VIN? These are my choices:

Front Axle, 3.08 ratio (opt GU4), ID AABT
Front Axle, 3.08 ratio (opt GU4), ID AACD
Front Axle, 3.08 ratio (opt GU4), ID BAAD

 

[donjetman]

RPO code in the glove box.
Mine is GU6 = 3.42