Im swaping a 4.8 with ls1 intake and wiring harness from a 99 camaro with the 99 camaro ecm. My question is what do I do about the tuning on the ecm? I know I need to have it reflashed to remove vats,egr,rear o2s and so on but not sure where to get it reflashed for a 4.8.

 

any place that can remove that stuff should be able to flash the new OS. That sure is an expensive swap to do the 4.8 and not upgrade to at least the 5.3L

 

well I would have upgraded to a 5.3 but I picked up the complete 4.8 for $100

 

Cool

Now spend another $100 on a 5.3 rotating assembly and upgrade the 4.8 to a 5.3. You'll kick yourself in the future for skimping on the cheap part of the swap. 5.3's are just too common and cheap to settle