Welcome to the forum!!!
YES.. you can tow a TT with your Armada. Its just a matter of matching the right one to your TV.
Remember, there are two ways to approach this. Many people take option 2
1) Buy a trailer that matches your Tow Vehicle (TV) you have now.
2) Buy a big truck that will pull *anything* you may want
Now, you are looking at matching a trailer to what you have now. Very normal, very doable.
Now, I recommend doing the following ASAP
Pretend you are going camping... No... don't put a tent and lantern in the back of the Armada... your clothes, bikes, stuff.. will be in the trailer. Put a few camp chairs in the back of the Armada... put your family in there and their gadgets that they will take with them on a trip.
Go to a truck stop with a CAT scale... fill up your Armada... go to the scale and weigh your vehicle.
Find your GVWR... it should be on the drivers door somewhere.. maybe in the owners manual.
Subtract the weight from the GVWR from the weight from the CAT scale.
This is your available payload to carry a tongue weight.
Note:
You will Run out of payload way way way before you hit the 9,000 lb mark of your tow rating.
Another forum member had a TERRIBLE time with handling with his Armada while towing. If I recall correctly, the issue was in the IRS's alignment. It was off ever so slightly and it caused big time handling issues.
So, I recommend getting the 4 wheel alignment dialed in.
I think you will find that the recommendation for a loaded TT to be around 6,000 lbs or less is a solid one.
Thanks and good luck!
Jeremiah