Question about 2006 Hummer H2

2 Answers

2003 Hummer H2 wont idle in drive and 4LO won't come out

We I start the vehicle in the morning it idles fine, but when I put my foot on the brake and put it in Drive the vehicle won't Idle.

Second problem... I put it in 4 wheel drive low and it will not come out, Tried everything, I hear and feel activity when I press the 4HI and the 4HI LOCK buttons but the lights only blink and won't go solid. Could it be the motor actuator on the transfer case?

Thanks,
Troy

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  • 6 more comments 
  • tdunham Jul 30, 2009

    The vehicle is locked in 4 wheel drive low and won't come out. I think your response thought I was in 4 wheel HI LOCK ...thanks

  • tdunham Jul 30, 2009

    I just tried driving backwards for 25 feet with the wheel turned and it still did not allow me to get out of 4LO Lock

  • tdunham Jul 30, 2009

    We I start the vehicle in the morning it idles fine, but when I put my foot on the brake and put it in Drive the vehicle won't Idle. Second problem... I put it in 4 wheel drive low and it will not come out, Tried everything, I hear and feel activity when I press the 4HI and the 4HI LOCK buttons but the lights only blink and won't go solid. Could it be the motor actuator on the transfer case? Thanks, Troy

  • tdunham Jul 30, 2009

    We I start the vehicle in the morning it idles fine, but when I put my foot on the brake and put it in Drive the vehicle won't Idle. Second problem... I put it in 4 wheel drive low and it will not come out, Tried everything, I hear and feel activity when I press the 4HI and the 4HI LOCK buttons but the lights only blink and won't go solid. Could it be the motor actuator on the transfer case? Thanks, Troy

  • tdunham Jul 30, 2009

    thank you so much. I am taking off the transfer case solenoid to make sure it looks ok on the inside. I due hear and feel a thump when I hit the 4HI and 4HI LOCK buttons though.



    The idle problem.....run great at start up but as soon as I put it in gear it kills and to keep it running I have to put foot on accelorator and yes it has hesitation



    Thanks



    Troy

  • tdunham Jul 30, 2009

    I would really appreciate you sending me the codes. I have a scanner



    I just ran the solenoid with it removed from the hummer and it seems to be operating ok. with it remove it still won't make the 4HI or 4HI LOCK light stay on



    Thanks

  • tdunham Jul 30, 2009

    My email address is tdunham@drainageplus.com

  • tdunham Jul 30, 2009

    Ok good news I finally got it out of 4LO LOCK and back into 4HI but still having an idle problem



    when you asked if it was hesitating I said yes but I think that is because it was in 4 wheel drive

    If I start the hummer in Park or Neutral it idles fine. If I put it in drive it wants to kill but will rev up without any hesitation. The only codes I'm getting are P0135 and P0135p which I believe is a bad oxygen sensor.



    any advice



    I appreciate all your help



    Thanks,



    Troy

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  • Master
  • 1,714 Answers

I would start by checking the shift solenoids down on the transfer case. These are what actually shift the transfer case from 2WD to 4WD. See if anything looks loose. Check the connections etc.

Posted on Jul 30, 2009

  • 2 more comments 
  • Craig Butler
    Craig Butler Jul 30, 2009

    On the idle problem, is there any hesitation during acceleration or is it just idle issue?

  • Craig Butler
    Craig Butler Jul 30, 2009

    I think it would be a good time to get a diagnostic scan to pick up and fault codes that might be available to help you diagnose this. I have the fault code schedule if you need it. Any automotive store usually can do this FREE for you.

  • Craig Butler
    Craig Butler Jul 30, 2009

    The solenoid may look like it's functioning ok with it out but it can be NOT moving the fluid though correctly to shift. Just a thought...
    The code read may tell you something too...
    I will send to your email..


  • Craig Butler
    Craig Butler Jul 30, 2009

    This could easily be causing the problem you've described and it's a fault in your computer. I think it might be it.

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Shifting between Four-Wheel High and Four-Wheel-High Lock With the vehicle traveling less than 75 mph (120 km/h), press and release the Four-Wheel High or Four-Wheel-High Lock button.

It may be necessary to drive backwards while turning for a distance of 25 feet (7.5 m) to get the lock feature to disengage.

Shifting into Four-Wheel Low Lock Notice: Shifting the transmission into gear before the indicator light stops flashing could cause damage to the transfer case. Always wait until the indicator light stops flashing before putting the transmission back in gear. To shift into Four-Wheel-Low Lock, the ignition must be in ON/RUN and the vehicle must be stopped or moving less than 3 mph (5 km/h) with the transmission in N (Neutral). The preferred method for shifting into Four-Wheel Low is to have the vehicle moving 1 to 2 mph (1.6 to 3.2 km/h). Press and release the Four-Wheel-Low Lock button. If the vehicle has a manual transmission, the clutch pedal must be pressed to the floor while you press the Four-Wheel-Low Lock button, or the shift will not be completed. You must wait for the Four-Wheel-Low Lock indicator light to stop flashing and remain lit before shifting the transmission into gear. It is normal for the vehicle to have engagement noise and bump when shifting between Four-Wheel Low and Four-Wheel High ranges or from Neutral. If the Four-Wheel-Low Lock button is pressed when the vehicle is in gear and/or moving too fast, the Four-Wheel-Low Lock indicator light will flash for 15 seconds and not complete the shift.

Posted on Jul 30, 2009

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1 Answer

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would take a lot of revs for first gear to make it roll from a standing start
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www.nhtsa.dot.gov
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Did you find the solution and if so could you email me the fix.

tdunham@drainageplus.com

Thanks,

Troy

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