Ive found so many good things here, its amazing a forum is still alive, face book is pretty **** compared to forums
Seriously, there are some easy tweaks you can make to improve drivability / fun factor, mostly related to IIRC:
- re-tuning the abuse parameters, see various posts in thread 'Towing with 33” tires versus 35” tires'
https://www.gmt400.com/threads/towing-with-33”-tires-versus-35”-tires.56164/post-1211110
- re-tuning power enrichment parameters
- disable VATS
- disabling EGR (if you wish)
- shift point and TCC tweaks to better suit your driving / personal preferences
- fuel gauge debuzzer
- other goodies I have overlooked, some of which may have been covered in the threads I provided above
Others here may have suggestions for tweaks to fuel delivery / spark advance / knock retard / etc.