I have a 2002 suburban computer. I bought it thinking I could write it to a 99-2002 fbody computer with out buying credits since I have gen3 v8 car licencing with hptuners but nope still have to buy credits for the 2002 suburban to write it to what I want. Ill let it go for what I have in it or trade for a 99-2002 fbody computer. $65 firm plus shipping and pay pal fees.