So I wanted to join the forum in order to get some help with tuning my 1999 c2500 7.4L Suburban. I just received my OBDXpro cable today and I'm hoping against hope that I can find an xdf and or ads file for my vehicle. From what I read already it sounds like my ECU is not too popular (service ID 16263494). I did search the forum and saw that way back a few people were trying to tune this one, but the threads end with no real finish or solution. I saw that HPtuners apparently supports this ECU but that is beyond my budget so any help offered me would be great . Thanks, Kenny
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