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2003 gmc envoy_slt
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140 Posts
Discussion Starter · #1 ·
Can anyone here tell me how many MPG the pcm4less tune can improve by. Ive searched the forums and cant really find information besides 20hp and 2mpg. just wondering if this is accurate Thanks
 

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2002 chevy trailblazer_ls
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2,461 Posts
Ya, they say one to two is typical. Not sure what mine is yet, just got it back last week.
 
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