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Thread: 2010 impala manual swap

  1. #1
    Potential Tuner
    Join Date
    Sep 2021
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    2010 impala manual swap

    hello !
    new to this forum and hp tuners. so i apologize if this post is in the wrong location or if this info has been covered somewhere else. if so i am unable to locate it.
    anyway ,
    i am collecting the parts to swap a 5 speed manual into a 2010 impala 3.5 4t65e . ive done several older w-bodies before, and im not concerned in the slightest on the mechanical aspects.
    my concern is obviously the pcm/tcm configuration. since it wants to see the input and output vss, and even the wrong ratio automatic gives it fits with all of the torque management and traction control bs.
    it is my understanding that it uses a E37 pcm but no manual calibrations for this car ever existed . however the hhr and cobalt use the same pcm with a manual trans. so at least in theory it is possible.
    is there a auto/manual switch in the pcm? can i delete all of the auto info out of it ? can i copy the manual portions or the cobalt/hhr calibration into the impala calibration?
    ive done a reasonable amount of tuning on other systems before. but mostly megasquirts and old prom gm computers. and some of the early 6800 series gm flash computers.
    i have no idea how these "new" ones are set up . i dont want to go too far down the rabbit hole . just the simplest solution that will make the car drive reasonable well. not concerned with squeezing every last horsepower out of it .
    it seems that hp tuners supports this pcm . so what do i need to buy from hp tuners to get started? and has anyone reading this done anything similar in this year with this pcm ?
    any info is greatly appreciated
    thank you

  2. #2
    Quote Originally Posted by newguyabc View Post
    hello !
    however the hhr and cobalt use the same pcm with a manual trans. so at least in theory it is possible.

    is there a auto/manual switch in the pcm? can i delete all of the auto info out of it ? can i copy the manual portions or the cobalt/hhr calibration into the impala calibration?

    thank you
    Unfortunate news. You would need to find an OE calibration for a manual 3.5L V6 vehicle to have any hope of this working. I don't believe this exists. No, there's no one switch for auto / manual, and no, you can't just delete the auto info out of it, nor can you copy the info from a different vehicle that uses a 4 cylinder engine.