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06-29-2008, 08:30 PM
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Elcova Rookie
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Join Date: Jun 2008
Location: CT
Posts: 7
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2008 H2 OPD Port Location?
I've spent an hour under the dash of my 2008 H2 and cannot find the OBD connection port? Can anyone tell me where it is and how to get at it? Thanks!
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06-30-2008, 05:54 AM
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Hummer Authority
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Join Date: Nov 2004
Location: Little Rock, Arkansas
Posts: 1,784
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Re: 2008 H2 OPD Port Location?
Ted I'm serious and not making fun when I ask if you have seen the port before on other vehicles?
The port unless moved on 2008 should be just to left of left knee as you would sit in seat.
Best bet would be to get owners manual out and it will show you instantly what I could possibly miss direct you into causing even more confusion.
Good Luck
TAZ
__________________
05 H2 SUV cus. paint, Magnuson SC 6/12lb boost, cowl hood scoop, 12" dash touchscreen, GM elec. fans, HPTuners.com tuning soft., Dynatech headers dual catback exhaust Jet Hot chrome front to back Flowmaster Super 40's, Diamo 8 Karat rims & 325X60-20" Toyo, 4 OEM Captain seats Katzkins leather, rear console computer inside running all AV/NAV etc., Infinity component system 3 amps Tsunami Caps, rear flip down 12" monitor, headrest monitors, overhead console boost, fuel pressure, & A/F ratio gauges
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06-30-2008, 01:46 PM
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Elcova Rookie
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Join Date: Jun 2008
Location: CT
Posts: 7
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2008 H2 OPD Port Location?
Taz, thanks for the reply! I had an 03 til I got this one, but never needed to locate the port. When you say "left of the left knee", I assume the port nust be behind the kick panel below the dash? Other than the parking brake release, there's nothing else I can see. I haven't gotten that kick panel off yet, it was way too hot yesterday, but lying down w/a flashlight, I can't see anything that looks like the port. Part of this may be complicated by the fact I've got a ton of extra wiring for trailer brakes, 2 light bars and 2 sets of grill lights. I'm just trying to locate it w/o screwing up all the wiring and relays!
Thanks again Ted
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06-30-2008, 01:47 PM
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Elcova Rookie
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Join Date: Jun 2008
Location: CT
Posts: 7
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Re: 2008 H2 OPD Port Location?
Oh, Taz, one more thing...no mention of the port in the manual. I think they don't want anyone messing with it! Ted
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07-01-2008, 07:00 AM
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Hummer Authority
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Join Date: Nov 2004
Location: Little Rock, Arkansas
Posts: 1,784
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Re: 2008 H2 OPD Port Location?
Hey Ted,
I'm really surprised there is no mention of OBD port. Sometimes I have seen pics of underside of dash left of steering wheel talking about something else and you could see port. Port should not be blocked behind a kick panel. It is used almost number 1 by Tech to plug diagnostic up to, so it would not be made hard.
Ted it may be under the hood near the fuse box on fender on drivers side.
Well hope you get it worked out. I do not know where else to advise.
TAZ
__________________
05 H2 SUV cus. paint, Magnuson SC 6/12lb boost, cowl hood scoop, 12" dash touchscreen, GM elec. fans, HPTuners.com tuning soft., Dynatech headers dual catback exhaust Jet Hot chrome front to back Flowmaster Super 40's, Diamo 8 Karat rims & 325X60-20" Toyo, 4 OEM Captain seats Katzkins leather, rear console computer inside running all AV/NAV etc., Infinity component system 3 amps Tsunami Caps, rear flip down 12" monitor, headrest monitors, overhead console boost, fuel pressure, & A/F ratio gauges
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07-01-2008, 11:21 AM
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Hummer Authority
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Join Date: Oct 2003
Posts: 1,118
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Re: 2008 H2 OPD Port Location?
On the 2003 it is attached right above where the wires are hanging down. (guess I need to move the wires back up) There is a plastic cover that just pulls off and that is where you plug a programmer in or where the dealership hooks into.
P.S. Moved the wires already 
Last edited by Easy Ed : 07-01-2008 at 11:26 AM.
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