03 6.0 Previously tuned, no SOTF?

[Jordo]

My friend bought a 03 6.0 w/zf6 and I'm fairly certain it was previously tuned with SCT. I went to apply the SOTF code mod nothing came up under OS. Is there a fix for this? Or is the truck stuck with a single tune? Any input or advice is appreciated.

[04silverado6.0]

Doesnt look like much of a tune. Did these even offer sotf with hpt?

[Jordo]

Should be able to do SOTF on the 03-04 trucks, but it only has 2 extra tune slots? And it's definitely been tuned by someone to disable the egr because it was missing when we pulled it apart to do gaskets and studs.

I now noticed that the vin in the ecm doesn't match what's on the dash? Now I'm not exactly sure I can safely write the truck.

[04silverado6.0]

Does the file match what the scanner pulls up for vin? Its definitely been into but not to much extenent.

[Jordo]

Seems to matchScreenshot (1).png

[dieselpitstop]

2003 STOCK ECU TCU SOTF.hpt

flash this in..

[Jordo]

I do a write entire, correct?

Thank you in advance for the help.

[dieselpitstop]

yes

[Jordo]

I really appreciate the help. It seems I'm having other issues now, because the truck won't let me license it at all. I think I'm just gonna submit a support ticket.

[ManaliPerformance]

one of your issue is the pcm still flash with an sct tune. Then it wont let you licence it because the vin probably dont match.

[Jordo]

I talked to support and they're saying it's unable to be tuned without having a dealer or someone with dealer tools flash it back to the latest stock calibration. Guess I'm going that route.