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Go Back   Hummer Forums by Elcova > Hummer H2 Discussion Forums > Technical Discussion and Customizing your H2

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  #1  
Old 01-27-2013, 09:17 PM
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Default HUMMER WONT CRANK..NEED HELP

Howdy

Hoping someone might have experienced similar and could give a little advise. A few months ago my 35000 mile H2 wouldn't crank with the key in the run position. All other electrical systems seem fine. A few hours later it worked just fine and no trouble for weeks. Then it became more frequent and by cycling the key several times rapidly I could get it to crank. When that little trick stopped working I had it towed to the dealership and they replaced the ignition switch. Second tow to dealer resulted in checking the connection to the fuse block, putting some dielectric grease on the connector($125.00). Third tow to dealer they turn the key and it starts...sorry. Fourth tow to dealer new starter. Fifth tow to dealer they discover that a dead cell in my battery is the culprit...I am told it is acting like a resistor and robbing the truck of power. Seems strange because everything in the truck lights up and works fine just no crank. Low and behold get home from dealer Friday and the truck has been dead in the driveway ever since. Whats left ? I hate the fact that this licensed GM dealer is throwing parts at it and making a fool out of me. Any help would be appreciated.
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  #2  
Old 01-28-2013, 02:51 PM
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Default Re: HUMMER WONT CRANK..NEED HELP

I had the same thing happen and they replaced the ignition switch. All was fine for two years and then it started happening again and I pulled the OnStar fuse as well as having them replace the ignition switch again. There's an old thread about the ignition switches going bad and the replacements not being any better until 2007. No problems since then.
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  #3  
Old 01-28-2013, 02:53 PM
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Default Re: HUMMER WONT CRANK..NEED HELP

I also pulled my OnStar fuse after two dead batteries.
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Old 01-29-2013, 05:32 AM
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Default Re: HUMMER WONT CRANK..NEED HELP

We need to put together a list and locations of all the grounds in those trucks.
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Old 01-29-2013, 07:31 AM
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Default Re: HUMMER WONT CRANK..NEED HELP


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Old 01-29-2013, 07:34 AM
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Old 01-29-2013, 07:34 AM
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Old 01-29-2013, 07:35 AM
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Old 01-29-2013, 07:36 AM
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Old 01-29-2013, 07:37 AM
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Old 01-29-2013, 07:37 AM
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Old 01-29-2013, 07:38 AM
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  #13  
Old 01-29-2013, 07:39 AM
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Default Re: HUMMER WONT CRANK..NEED HELP

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  #14  
Old 01-29-2013, 07:40 AM
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Default Re: HUMMER WONT CRANK..NEED HELP

G320 (SUT)




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  #15  
Old 01-29-2013, 07:41 AM
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Default Re: HUMMER WONT CRANK..NEED HELP

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  #16  
Old 01-29-2013, 07:43 AM
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Default Re: HUMMER WONT CRANK..NEED HELP

G100


On the left front frame body mount


Power and Grounding Component Views


?


G102


At the left front side of the engine block


Power and Grounding Component Views


?


G103


At the top right rear of the engine


Power and Grounding Component Views


?


G104


At the top left rear of the engine


Power and Grounding Component Views


?


G106


At the right rear of the engine compartment on the forward dash panel


Power and Grounding Component Views


?


G200


On the left side of the I/P behind the left kick panel


Power and Grounding Component Views


?


G203


At the lower right side of the I/P behind the right kick panel


Power and Grounding Component Views


?


G300


On the left side body mount in front of the driver door


Power and Grounding Component Views


?


G302


At the left inner center B-pillar


Power and Grounding Component Views


?


G304


Under the front passenger seat carpet


Power and Grounding Component Views


?


G306


At the right inner center B-pillar


Power and Grounding Component Views


?


G310


At the left frame body mount under the left rear passenger door


Power and Grounding Component Views


?


G320 (SUT)


Left side of the midgate assembly near C300


Power and Grounding Component Views


?


G401


At the left rear frame body mount


Power and Grounding Component Views


?


G402 (ZM6)


Attached to the front of the air suspension mounting bracket


Power and Grounding Component Views


?


G403


At the right frame body mount near the right rear door


Power and Grounding Component Views


?


G405


At the right rear frame body mount


Power and Grounding Component Views


?


G410 (Except SUT)


On the right rear inner side body panel
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  #17  
Old 01-31-2013, 07:00 PM
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Default Re: HUMMER WONT CRANK..NEED HELP

The H2 has now sat at the dealer all week and they dont have a clue. I am asking for a new ignition switch with fingers crossed. Let let you know how I make out. Will pull the onstar fuse when it gets home.

Thanks for the replies!
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  #18  
Old 02-01-2013, 04:29 AM
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Default Re: HUMMER WONT CRANK..NEED HELP

Great info Humtech!!!! Subscribed for the dreaded future.

OP- Is your battery going dead? Or other issues?


If bat going dead install the priority start module, problem band aided well!
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  #19  
Old 02-12-2013, 06:26 PM
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Default Re: HUMMER WONT CRANK..NEED HELP

No battery issues. I'm now leaning toward anti theft issue. If I cycle the lock and unlock on the key fob 10-15 times it starts at ramdom. The problem also seems to occur more often when the temp drops below freezing. Really wierd. A friend suggested having a remote start installed and bypass the system. Does anyone know if there is a seperate anti theft module or if it is built into the main computer?
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  #20  
Old 02-12-2013, 11:25 PM
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Default Re: HUMMER WONT CRANK..NEED HELP

Quote:
Originally Posted by H2FAR
A friend suggested having a remote start installed and bypass the system.


Every once in a while my H2 won't turnover. I have remote start so I tried that and still no start. It happened about 5x so far and every time I waited a few minutes and then it starts?
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