QUOTE=Kennedy;240128]My guess is that the previous owner did something with the computer that copy protected/locked it.
About the only suggestion that I have is that we can exchange it and hope that a different one works. Before we go to shipping Internationally, I'll try to set up an email conversation between you and Diablo Tech to see if they have any further ideas. If it is truly locked it just isn't going to communicate. We can set up a different PCM from salvage, but then you may as well upgrade to my Kennedy Custom tuning.[/QUOTE]
I tried the Predator in 2003 on my truck and it would not work. After a couple of upgrades I finally moved on and tried about every tuner I could find. Then I installed a BD turbo and nothing that I could find would supply enough fuel to feed the the Turbo until I purchased the Kennedy ECM, 100HP/250HP version. Now my truck is unbeleivable I drive it daily on the 100HP tune and when the need arises I flip the switch to 250HP setting...........all I can say is WOW!!!!
If you really want the best give John a call and let him fix you up with a custome tune for your truck, you won't be sorry.
A couple of weeks ago I ran my truck here locally at Firebird Raceway. The ET was 13:34 @ 105.65 MPH. Truck weighed 7800# with leer camper shell, bed slide, approx. 30 gal. fuel (57 Gal. Supertant) and my 250lbs. Not to bad for a street driver and tow vehicle.
'03 Chev Duramax ext. cab, Kennedy ECM,After Market turbo,tranny, triple disk convertor, Exhaust Brake, electric tran. cooler, dual exhaust, Supertank 57 gallon.