Question about Hummer H3

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My 2009 hummer H3 is not shifting between gears, in the begnning it is okay, then after a couple of hundred yards there is no response from the gear. If I switch the car of and then on again, the gear will work for another 200 yards or so, the same thing keeps happening... what could the problem be?

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  • Hummer Master
  • 75,797 Answers

The transmission in this truck is computer controlled, so when ever you have an issue with shifting the very 1st thing that must be done is to have the powertrain control module or the TCM tested for fault codes. Aamco transmission does this testing for free and will give you a preliminary diagnosis of what may be causing the problem free of charge in most cases..

Posted on Feb 13, 2012

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 2009 Hummer h3 won't start

My H3 didn't start this morning. I noticed something unusual about my truck when I first tried. The alarm had a weak sound when it went off. The fact that it turned over but didn't start made me believe it was not the battery. I was trying to call the mechanic and a wrecker to get my H3 fixed. However, before that I got the wrecker out there, I went to Autozone. He told me it sounded like the battery and cold weather kills the battery. So 3 hours have passed and temperatures warmed up to a cool 56 degrees. I was going to put jumper cables but out of curiousity, I said well let me crank it and see if it was cold weather. Sure enough, it cranked right up.

Either way, I am going to take it to Autozone and have the battery checked. I can't miss another day of work due to an old battery.

Posted on Dec 29, 2008

  • 2 Answers

SOURCE: 2006 H3 Hummer AC/Heater Fan Motor

I brought my 2006 H3 in to the dealer for the same thing. My blower stopped working all together but it started as an intermittent problem. He said he had to replaced a diode or resistor either behind the switch on the dash that controls the fan or on the fan motor itself. Have not had a problem since but that was only about 4 months ago.

Posted on Apr 09, 2009

  • 114 Answers

SOURCE: how do i shut off my change oil light in my h3

I'm not 100% on this but I think it's like a lot of GM's; turn the key to the "on" position(not running), stomp the gas pedal to the floor 3 times within 5 seconds & the light should flash & go out.

Posted on Sep 24, 2009

iambanshee74
  • 3489 Answers

SOURCE: Hummer H3 Losing power when shifting from 1st to 2nd gear.

as odd as this may sound, try replacing the fuel filter.

Posted on Nov 02, 2009

  • 1 Answer

SOURCE: 2006 H3 Hummer fan problem

Hi if your internal fan not work in any position well i fixed up myself easy and save your money.
locate the fan motor air just outside right courtesy drawn document in front of passenger. go from down and look up you will see a motor with a big connector white with 2 screw secure inside the motor block. loose the two screws and pull out gently the connector from motor fan block. you will see a green multiresistor connected with this big connector. Usually the first + voltage connector is burnet out. disconnect the connector pull from resistor and check for any burn. in my case the first pin was burned out completely
you can buy another connector or you can clean the burned connector take out form connector weld a small copper cable of 5 mm dia from resistor to the burn cable and reconnect the connector without buy a new one. after replace again the resistor in the hole of motor blow with the 2 screw.
Done all work again without buy another new connector.
Gabriel from Italy Turin
H3 hummer 2007
loveling one and Humvee owner

Posted on Jun 11, 2010

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