Offroad Trailblazers and Envoys

Speedometer correction after un-lifting and 4.10s

Trailblazer and Envoy related, but not off-road related...

by Gordinho80 » Thu Apr 10, 2014 4:16 pm

Anyone on here capable of updating my PCM to reflect the stock tires and the 4.10 gears?
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by Shdwdrgn » Sun Apr 13, 2014 4:55 pm

I've actually been discussing the same subject here: viewtopic.php?f=32&t=5166

It appears to be possible to change the gear settings with a reprogram by HPTuners (and probably any other tuner if you have the right files). I just sent some info over the HPTuners yesterday, and they are looking into it to see if they can possibly identify the changes that affect gear and tire settings for the 2002-05 models. I'm crossing my fingers...

At the very least, I posted a tune file that is appropriate for 4.10 gears with 31" tires.
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