I often don't like fielding questions like this, because there is usually little a DIYer or even independant garage can do about Stability problems on such new vehicles, but I will try to help as much as I can.
For starters, anytime the Stability system is disabled, there is a fault code stored somewhere, either a Powertrain code or a Chassis code. Many shops don't have the equipment to read chassis codes, which would requrie a trip to the dealer. Knowing what code is stored, would help isolate to source of the problem. I can tell you that we have replaced many Steering Wheel Position Sensors for this concern.
There are also some software updates for the Stability system, which would need to be checked. They are VIN specific (not all 2007 Suburbans get the software update), so you won't know if you need an update or not until somebody compares what software you have versus whats available. Again, this is a dealer only service.
However, a few things you can do! Since it happened after you hit a pothole, first check to make sure the steering wheel is still straight. If something happened in the suspension and the wheel is no longer straight (or the wheel was ever taken off and not put back on straight) this will disable the stability system.
All four tires must match what is on the tire placard. If you have changed tire sizes, have some new tires mixed with bald tires or have a spare on, it can disable the stability (wouldn't be related to the pot hole though).
Lastly, most stability vehicles have a position sensor mounted at each wheel.
I have often found the sensor linkages pulled apart or disconnected, which will also disable the stability. If the pothole jarred one of the sensors and the linkage seperated or came undone, you may be able to fix that yourself.
Below is a picture of the sensor, so you know what to look for. Your truck may or may not have it, but if you do, make sure its not damaged and the linkage arm (#1 in the picture) is connected on both ends, of all 4 wheels.
Please let me know if you have additional questions.