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06-24-2008, 05:51 PM
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Hummer Veteran
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Join Date: Jan 2006
Posts: 33
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4wheel drive switches...stays in Neutral?
Sometimes I get in my truck, fire it up and the red light stays on for Neutral, and never switches to 4 hi. I can press the 4 hi button and it will stay in 4 hi. But I have also noticed that if I forget to look and I'll be driving and it will still be in Neutral (redlight) and not driving any different at all than if it was in 4 hi. Its out of warranty, any suggestions?
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06-24-2008, 10:17 PM
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Hummer Expert
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Join Date: Jun 2008
Location: New York
Posts: 524
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Re: 4wheel drive switches...stays in Neutral?
This happened on a few '05 and '06 models. There is a thread in here in the technical section in the summer of 2005. As I remember it's a relay that is cheap and easy to have replaced.
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Hummer, like nothing else
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06-26-2008, 07:56 PM
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Hummer Veteran
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Join Date: Nov 2006
Posts: 172
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Re: 4wheel drive switches...stays in Neutral?
How's your battery?
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06-30-2008, 09:48 PM
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Hummer Veteran
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Join Date: Jan 2006
Posts: 33
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Re: 4wheel drive switches...stays in Neutral?
battery has never been replaced, '05 SUT with 55k on it......
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07-01-2008, 03:11 PM
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Hummer Veteran
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Join Date: Nov 2006
Posts: 172
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Re: 4wheel drive switches...stays in Neutral?
You may want to have the battery checked out to make sure it is up to par. You could be having a low voltage situation to the tccm when first starting it up causing it to do weird things.
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05-09-2010, 06:57 AM
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Hummer Novice
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Join Date: Apr 2010
Posts: 15
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Re: 4wheel drive switches...stays in Neutral?
I would like to revive this thread. Ive been experiencing the same problem. My TC tends to go from 4HI to The RED NEUTRAL Light on it's own. I would like to resolve this myself before taking it to the dealer. From the info I have gathered these could be some of the fixes but would like to hear from others who have resolved this
1- Replace TCCM Actuator?
2- Replace relay fuse?
3- Replace Encoder motor?
4- Go through all TC drives 25 times?
Last edited by BUMMER : 05-09-2010 at 07:03 AM.
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05-09-2010, 12:45 PM
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Hummer Authority
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Join Date: Jun 2005
Location: Key Largo
Posts: 1,174
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Re: 4wheel drive switches...stays in Neutral?
I can't find the old thread on this but I remember something about going from 4Hi into 4 Lo and 4 Hi lock several times to see if it clears things up.
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05-09-2010, 02:57 PM
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Hummer Novice
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Join Date: Apr 2010
Posts: 15
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Re: 4wheel drive switches...stays in Neutral?
Jim, I believe that would be similar to what Ive read by going through 4HI and 4LO 25 times. I don't see how that would work but I will give it a try. The funny thing is when the TC goes into Neutral, the truck seems to drive smoother however my gas mileage only averages 8.9 at best!!
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05-09-2010, 05:25 PM
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Hummer Veteran
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Join Date: Sep 2006
Location: San Diego CA
Posts: 203
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Re: 4wheel drive switches...stays in Neutral?
i am having the same issue.
i thought maybe since i have not change my transfer case fluid (52K miles) it may be a warning to change it?
if you guys find a fix please post it.
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2006 Yellow H2 Lux Series
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Rear 2.5 X 7/8 Piggyback Reservoir Fox Shocks
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Ready Lift Front Leveling Kit 2 1/2"
Cognito Steering Support Kit
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Fabtech Steering Stabilizer
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05-09-2010, 05:39 PM
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Hummer Novice
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Join Date: Apr 2010
Posts: 15
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Re: 4wheel drive switches...stays in Neutral?
Cesarjajr, does your light stay in Neutral or does it go back and forth to 4HI like mine? Has your gas mileage changed?
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05-10-2010, 06:49 PM
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Hummer Veteran
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Join Date: Sep 2006
Location: San Diego CA
Posts: 203
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Re: 4wheel drive switches...stays in Neutral?
Quote:
Originally Posted by BUMMER
Cesarjajr, does your light stay in Neutral or does it go back and forth to 4HI like mine? Has your gas mileage changed?
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it stays red in netural, i have to hit the 4 hi and then it will stay on 4 hi.
it happens on and off. i shift to drive and sometimes it's red in neutral.
some times im already driving when i see it in red neutral and didnt see when it changed.
i have seen no dip in miles + or -.
__________________
2006 Yellow H2 Lux Series
Front 2.5 X 7/8 Remote Reservoir Fox Shocks
Rear 2.5 X 7/8 Piggyback Reservoir Fox Shocks
37x12.50xR17 BFG Mud Terrain's
Ready Lift Front Leveling Kit 2 1/2"
Cognito Steering Support Kit
Cognito Idler Pivot Kit
Fabtech Steering Stabilizer
Fabtech Tie Rods
Power Slot Slotted Rotors
Crown Performance Stainless Steel Braided Brake Lines
Off Road Unlimited Black Diff Cover & RP Diff Fluid
Hypertech Power Programmer
True Flow Foam Air Filter
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05-11-2010, 12:13 AM
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Hummer Veteran
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Join Date: Oct 2009
Location: Washington
Posts: 147
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Re: 4wheel drive switches...stays in Neutral?
This happened to me the other day and even the service 4wd came on after trying to switch. I pulled over turned off and then cycled thru the choices. seemed to work. I didn't do it 25 times but should probably give it a run thru. I've searched the issue on this site. Some say sticky cyleniod or error from never using. So I plan to cylce thru the 4wd choices and air ride height adjustment more often.
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04-27-2011, 03:36 AM
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Hummer Veteran
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Join Date: Dec 2009
Location: Oklahoma
Posts: 75
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Re: 4wheel drive switches...stays in Neutral?
Older post, but my SUT suddenly started having the same problem. Does driving while the neutral (red light) is on hurt anything? I Ned to have it looked at, unless someone knows the solution...
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04-27-2011, 07:21 AM
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Hummer Veteran
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Join Date: Jun 2009
Location: Germany
Posts: 215
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Re: 4wheel drive switches...stays in Neutral?
I just posted a thread on this myself.
This just started on mine after I installed 2 new hubs. Never did it before, so I thought it was related - Maybe not?
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06-28-2011, 03:51 AM
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Hummer Veteran
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Join Date: Dec 2009
Location: Oklahoma
Posts: 75
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Re: 4wheel drive switches...stays in Neutral?
Took mine to the dealer today...broken fork in the transfer case...$280.00, covered on my warranty.
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