l31 in both tahoe and c1500 using tunerpro pcm hammer and 411 have a express basemap ive looked at has anyone messed with flex fuel was wondering if theres a l31 flex tune if it would even work
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l31 in both tahoe and c1500 using tunerpro pcm hammer and 411 have a express basemap ive looked at has anyone messed with flex fuel was wondering if theres a l31 flex tune if it would even work