Question about 2003 Hummer H2

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Is the h2 always in 4high or can you take it out?

Is the 4wdHigh light always on,and if so are you always in 4wd?

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It is All Time 4x4. The light should only be on when you Shift into 4 Lo or 4 Hi Though.

Posted on Jan 10, 2009

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Why is the service 4WD message on all the time and diff lock light flashes and dos not lock?


Hummer 4wd service light reset Questions & Answers - Fixya

www.fixya.com > Forum > Tags > 4wd service light reset
Hummer h2 2003 55000 mill ... service 4wd the liht is on all time Remote the battery wire from the car for 20 ... My 2006 H3 will not come out of 4 wheel drive?

Sep 22, 2015 | 2006 Hummer H2

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What is wrong with my 2000 chevy blazer ; it is a 4wd automatic an i locked it in 4wd low to pull my boat out of the water and can not get it to shift back i to 2wd?


You shouldn't have to use 4wd to tow a boat out of the water. Does your truck have a 2wd button or just the 4high and 4low button? If you have a 2wd button, put tranny in neutral and then hit the 2wd button. If you just have the 4high and 4low button, put the tranny into neutral then press the 4high button twice (Once to get back into 4high, then again to get out of 4high and back to 2wd).

Jun 04, 2014 | 2001 Chevrolet Blazer

1 Answer

Do you drive.in two wheel or four wheel drive, how do you change.to two wheel drive?


The Hummer H2 and H3 are both all time 4WD. There is no way to put it in 2WD. Now, you can select 4WD High or 4WD Low. You can also, if your vehicle is equipped with it, lock the front or rear wheels through the differential selector. This is one of the primary reasons Hummers get terrible gas mileage is because they are always in 4WD.
The only other solution is to swap the transmission to an Allison 6Spd, which is often done with diesel conversions, and they usually give you a 2WD option, and can get up to 25 MPG out of an H2.......but that conversion is about $30k.

Jun 23, 2011 | 2005 Hummer H2

1 Answer

Locked up in4wd low


Stop vehicle, shift to neutral, foot on brake, push 4wdHigh or 2wdhigh button. Then put transmission from neutral to drive after you hear response from pushing 4wd high or 2wdhigh button and a change in the indicator light.

Would like to know if this fixed your problem. The instructions for operating your Transfer case is in the original Owners manual. Many, many times second and third parties throw out all of the paperwork when the vehicle is detailed for resale.

You can use the reply feature of this service to reportyour result. Thanks and I hope my solution has helped you.

Jan 14, 2011 | 1998 Ford Explorer

1 Answer

4WD will not engage any more, for awhile it would work sometimes but not any more .The light on auto4x4 will stay on but the light on 4high and 4low will just blink any idea's?


the solinoid the that engages the 4wd in your transmision is broke, its an easy fix and should cost more than 100 bucks.

Dec 04, 2010 | 1999 GMC Sierra

1 Answer

4wdhigh and 4wd low lights flash 5times every minute or so whiles driving


make sure the elec plugs on the transfer case are tight

Sep 30, 2010 | 1998 Ford Explorer

2 Answers

4WD switch not working on a Hummer H2


Same thing happened with my H2 2003 model, no lights above the 4wd buttons and i can't switch between high and low 4wd.
did u know what is the problem ?

Mar 25, 2009 | 2005 Hummer H2

2 Answers

I was in 4WD H, came to a stop for about 5 minutes in a parking lot. When I proceeded, I heard a loud "clunk" - thought I hit something. but I did not. My truck went into 4WD L all by itself. I pulled over...


unhook the battery for about 5 mins. this will reset the powertrain control module (PCM) that would be a good start, is this a king ranch? or just a basic f-150?

Jan 13, 2009 | 1995 Ford F150 Styleside Regular Cab

2 Answers

4 wheel drive will not engage in low, light just flashes on switch, will engage in Hi but there is a serious vibration over 40 mph


The vehicle must be in neutral to shift into and out of 4LOW, 4HIGH is not for typical road use, anytime you have "fair" road conditions, the wheels will vibrate in 4wd. Use the AUTO 4wd when on a road that has a solid surface, mostly free of ice, it will only kick in when a wheel slips.

Nov 16, 2008 | GMC Jimmy Cars & Trucks

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