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Go Back   Hummer Forums by Elcova > Hummer H2 Discussion Forums > General H2 Discussion
Reload this Page Need help on HVAC schematics

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Old 06-02-2011, 02:53 AM
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Default Re: Need help on HVAC schematics
Question the Tech 2 computer that they will hook to my truck.. will it download ALL updates, or just the specific one I'm having trouble with?
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Old 06-02-2011, 02:54 AM
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Default Re: Need help on HVAC schematics
Yea...
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Old 06-02-2011, 02:54 AM
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Default Re: Need help on HVAC schematics
Can only flash one module at a time
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Old 06-02-2011, 02:56 AM
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Default Re: Need help on HVAC schematics
Never tried that, may set a code and default the hvac doors. Depending on what code may set you could get stuck on full hot, defrost. Not likely that would happen by unplugging the recirc/fresh actuator though
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Old 06-02-2011, 02:58 AM
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Default Re: Need help on HVAC schematics
Gotcha, I guess I'll take it up to my dealership then...

I appreciate the help... Hopefully it just needs the update
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Old 06-02-2011, 03:01 AM
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Default Re: Need help on HVAC schematics
No problem, hope it works out for ya. If you were in Canada near me i would flash it for ya and only charge accordingly if it fixed the problem, unfortunatley not many gm techs will be willing to do that.
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Old 06-02-2011, 03:04 AM
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Default Re: Need help on HVAC schematics
Haha, For real.

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