Message: i installed a hypertech pp3 on my 00 qc 4x4 w/5.9 and i was able to raise the speed limiter, rev limiter, and adjust for the 33" tires. i also went with the 93 octane tuning. i can feel a strong increase in power between 2000-5000 rpm and the trans shift points are better now that the tire size has been addressed.
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Subject: Hyper-Tec????