I have an 04 GP, with a cold air intake and high flow exhaust, I want to add a reprogramed PCM, I've seen diffrent articals stating you need a case learn procedure afterwards to eliminate the check engine light. while others say it's not needed, anyone know 1st hand if I would or not? Because I'm having trouble finding some to do it without reflashing to OEM defaults, Don't wanna spend the $ for no reason.

Any help would be great, thanks.