2004 GMC

[Lonewolf]

I have a 2004 GMC sierra 5.3L. I'm currently running your tunner on the 87 octane setting. I am pleased with it but I was wondering if there is any mod's i could do to get more out of it. My truck has AEM cold air, Throttle Body Spacer, Turbonator, Gibson exhaust, and your programmer.

[mikel]

I think the best suggestion I could make here would be to use the 93 tune and 93 octane fuel for increased performance.
You are limited in the amount of spark you can run when using 87 and that limits total power output.

Thanks