Tuner or not?

[Welder]

Just traded for a 2011 GMC that supposedly has tuner. All i see is a 5 position switch on dash that has 2 wires (yellow and black) that run to what i'm going call a control module under the hood. Just trying to get some info if possible. Any help appreciated, thanks in advance.

 

[2004LB7]

DSP5 from Efi live

 

[TheBac]

Can you possibly take a couple pics of the switch and the "control module"?

 

[Welder]

Hope this works.

 

[2004LB7]

From my understanding on the LML it is not a true DSP5 like the previous gen trucks. But instead a trick on one of the limiter sensors such as fuel temp. I think many are done through easy link tuning but can also be through efi live

 

[Welder]

Thanks for reply should i see some other equipment or could tune just be stored?

 

[2004LB7]

Should be just a tune and switch