Can't get my predator to download. I have followed all the directions and have called Diablo for advice. I get a "access denied" followed by "script error" when the unit is trying to read my stock tune. They are telling me to make sure the correct fuses are removed, I have double checked my work and still no luck. They talk about an "info" fuse but I cannot find one in either fuse block.

I bought the truck used and have talked the previous owner and he did not make any mods at all.

The truck is a 2002 2500HD D/A.

Any idea's ? They have (Con's Performance) exchanged the unit and I get the same thing with the new unit that I got on the first one.

Thanks,

Phil

When I did mine I started with the running lights on and had to shut them off and apply the parking break. I have not had any problems uploading or downloading. Keep us informed on what you find out.

parking brake was on, same results.

For the info. fuse have you tried the instrement cluster fuse?

Have you put your ignition in the "run" position? When I first tried to load my stock tune I got the same result as you, I was putting my key in the "on" position, it needs to be in the "run" position to work properly.