Need some help 07 GMC 2500 6.6L

[Brian21]

I bought a used GMC LBZ and it came with exhaust and the Diablosport not sure what model number it is as far as i can tell its the old discontinued one. is there a way i can change my tunes with that or do I need to buy a new one? I read how to use it and pluged it in but it would not save the backup, so I never got to see what tunes he had on it before i bought it. Pleas advise on what i need to do to use this product.

Thank you

Brian

[mikel]

what does the tool say for options/show last tune written?

What happened when you tried to tune it?

Thanks