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2003 chevy trailblazer_ltz
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So as many of you saw my thread, I just added lift kits and 35x12.5x20 tires. I will soon be adding exhaust so if you think I should wait for tune tell me? Where should I get a tune and can anyone lead me in the right direction? Also I need something that will adjust my speedometer?
 

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So as many of you saw my thread, I just added lift kits and 35x12.5x20 tires. I will soon be adding exhaust so if you think I should wait for tune tell me? Where should I get a tune and can anyone lead me in the right direction? Also I need something that will adjust my speedometer?
I would wait......you can go with a PCM4LESS tune, they are one of the vendors here.....before I got a tune, I did the CAI, Dual Magnaflows and 22's and on the tune build sheet I got tuned to my needs. Good luck man!
 

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2003 gmc envoy_slt
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If you are going to get an exhaust for sure in the not to distant future, just have the tune include the exhaust you plan to get and get the tune with the new setting for the new tire size now.:m2:
 
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