I have a lightly modded 2003 N/A Monte Carlo 3800. I just got my trans rebuilt back in March and I've been looking into getting a PCM tune mainly for the benefit of smoother shifts as well as some added power. I'd also like to get that CEL light deleted for the hi-flow cat as well. I guess my biggest dilemma is spending 250+ dollars and possibly more for a case/crank relearn on the damn thing and seeing little to no change. I'm not looking for a race car here but my main concern is performance.

I've seen great feedback from others but most people also have many more upgrades than I do.

Mods:
ZZP Solid Engine Mount
ZZP Catted Downpipe w/Highflow Cat
ZZP Poly Transmission Mount
ZZP Powerlog
Solid Sway Bar
Flowmaster 40 Mufflers
Magnaflow Glasspack in place of resonator
Homemade FWI w/4in Filter
Front and Rear Drilled and Slotted Rotors
Ceramic Brake Pads