1999 Silverado 1500 - New ECM Flash Upload Quick Question

I had to get a new ECM for my truck and want to upload my tune from my previous box. I purchased the credit and it keeps telling me I can't write to my new ECM. What do I need to do?

I uploaded the verification ID and it shows on HPT I have the credit for this, but keep getting the ATTENTION!!! message at the top when I try to write.

Appreciate the help!

Just license the new computer with 2 credits and use the compare feature to copy over the data in your previous tune to this new computer.

Thanks!

Quote:

---

Originally Posted by 5FDP

Just license the new computer with 2 credits and use the compare feature to copy over the data in your previous tune to this new computer.

---