H3 hummer I 5 3.5

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Anyone done anything performance wise with the 06 GM H3 3.5 Hummer 4 speed auto?

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Kind of discouraging to think there are none out there...

[Chevy366]

Not much for the I5 , pretty limited , the P12 PCMs have a few things to tweak , but not a lot , a little motor and trans adjustments .

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Looks like HP Tuners may be a better bet for this. Thanks!

[Chevy366]

Sadly , yes .
Tried for a long time to get the P12 stuff to evolve , but one can't sway the tide alone .
Have only seen the I5 stuff in HPT once and did not notice to much more tuning parameters than EFILive though .

[ScarabEpic22]

Sadly , yes .
Tried for a long time to get the P12 stuff to evolve , but one can't sway the tide alone .
Have only seen the I5 stuff in HPT once and did not notice to much more tuning parameters than EFILive though .

Thats discouraging, I was (halfheartedly) looking at buying HPT to tune P12s. Hopefully Ill get everything together and work on a PCM swap for older TBs and then Ill need P12 support. Still not quite sure how to deal with the 4 or 5 VE tables the P12s have for the VVT...

[dieselz28]

I have an 07 with the 3.7L. I'm got EFI Live mainly for my HD, but I plan on tuning the HUMMER as well. I'm still new to the whole thing right now but I will post things as I figure them out. I asked the same question on Duramaxforum.com and got talked to someone about a trailblazer they did. He said that he added about 50 more miles to a tank of fuel. Figure if I can do the same that will be about 3 more MPG.

[dieselz28]

WOW I need to proof read.... Screaming babies and message threads don't mix!!!

[Chevy366]

WOW I need to proof read.... Screaming babies and message threads don't mix!!!

Come on , you mean to say you can't multi-task ?

[joecar]

Or, teach your babies to read the forum threads and ask/answer questions on your behalf... ...and to tune your vehicles, and install mods while you supervise...

dieselz28 welcome to the forum...