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Discussion Starter · #1 ·
I have a 2007 new body style Silverado not the classic and for modifications I have mbrp car back exhaust and k & n cold air intake and the Bully Dog GT programmer I have noticed on the performance tune that one mash the gas in really get full throttle I get a lot of black smoke out the tailpipe I also did new spark plugs what with AC Delco iridium the OE style how can I fix this and reduce the amount of black smoke I'm getting

I'm also looking to get a little extra power if anybody knows another mod that's not going to break the bank and not too hard to do I was thinking possibly headers or catalytic converter delete just wondering what my options are and what everyone else is done thank you
 

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Does the truck smoke on the other tunes? If not, I'd suggest getting rid of that tuner.
 
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