I have an excursion too. My theft light blinks randomly with some tunes, but the last looney Vivian sent me work correctly with the PATS.
The reset algorithms, including the one you posted, never worked on my truck. I tried endlessly to get it to reset and finally gave up. My conclusion... whatever base-code the tunes are generated off of isn't quite right for the Excursions.
After talking with SCT, it sounds like the strategy must be matched more closely (wanted to say closelier) on the Excursions for PATS to work. I would see if Vivian and DJ can send you a handful of tunes so you can check their behavior with the PATS system.
Now, I have my fingers crossed that DJ can merge the fastest looney for my truck (and PATS works) with the best looney for my truck (not as fast but really smooth through all gears, PATS is dead). If so, DJ IS GOD!
Good luck!:Cheer:
Brad