Help please....
I have a 97 chevy truck with 5.7 4l60e...
I put a 355 in with flat top pistons and aggresive cam...
I ordered hp tuners allready...
I am fixin to buy a 411 pcm for my truck from this ebay post
http://cgi.ebay.com/ebaymotors/Expre...Q5fAccessories
If i get them to flash it for a 2002 express van file and writ emy 97's vin number in.
Will i still have to use 4 credits to start tunein or only 2 ???
Any help will be very much apperiated..