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New truck Upgrades?

863 Views 8 Replies 4 Participants Last post by  n0useforaname, 
J
I just bought a 05 GMC LLY Looking for programer for towing and better mileage.What should I look for? Also what upgrades do Yall recomend Exauste/ Egr ?
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Jugg
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J
How mutch power can I add saftley with the stock tranny?
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J
That's about what I was looking for.What about the edge products? Any one running summit exaust system? If I Delete the cat will it set codes? Sorry for all the questions.
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