I have a bone stock 04 GTP amd i am starting to mod it, I have a MAF and pigtail off a 05 5.3 Silverado laying around and i was wondering if anyone has ever done this swap. I searched and wasnt able to find my answer. If i need a tune thats fine my friend is going to tune it for me when the weather clears up. The reason for the maf swap is its bigger and i think id benefit more from a 4" CAI.