Question about Chevrolet Silverado 1500HD

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4 wheel light stays when in 2 wheel

4 wheel light indicator stays on all of the time. replaced 4 wheel drive selector switch replaced actuator. no change

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  • 207 Answers

Have you checked the shift linkage cable?

Posted on Jan 03, 2014

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Posted on Jan 02, 2017

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SOURCE: My 1999 chevy silverado 1500 four wheel drive

You probably have a bad encoder motor.It is located on the side of the transfer case on the drivers side.It is black.The other problem they had with these was the switch but you have already replaced this so your next thing is the encoder motor.Hope this helps.Good luck.

Posted on Dec 28, 2009

  • 62 Answers

SOURCE: 4 wheel drive on my jimmy won't engage

try disconecting the battery to reset service light may not solve the problem but should allow u to put truck into 4 wheel

Posted on Dec 20, 2008

  • 57 Answers

SOURCE: 2002 trail blazer 4wheel drive service light on

I would first give a visual test on the wires to see if there is a short anywhere, can you run a test meter on the control module to see if there is ohms resistance or shorting out!

Hope this helps.

contact again if you cannot sort this out!

Posted on Oct 30, 2009

  • 56 Answers

SOURCE: 2005 Trailblazer no 4 wheel drive.

usually the actuator will still make the light still come on if its bad I would check the actuator

Posted on Jan 02, 2010

  • 1 Answer

SOURCE: 2001 Dodge Durango 4 wheel Drive doesnt work

i had same problem for almost 6 weeks . I just replaced my batty and it fixed the problem compleatly

Posted on Mar 01, 2010

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1 Answer

My 4 wheel drive selector switch lights stays on and the 4 wheel drive dont work replaced switch replaced fuse disconnected plugs from everything and lights still stays on any ideas


What make model and year vehicle ? When the light stays on it's telling you there is a problem and there is a DTC - diagnostic trouble code stored in the 4X4 control module ! Could be wiring , a module , transfer case actuation motor , or decoder motor etc... Just depends on what make , model and year ! But the first place to start , checking for DTC'S

Dec 06, 2016 | Cars & Trucks

1 Answer

Why won't 4 wheel drive engage?


4WD Transfer Case Position Sensor/Selector Switch May ...

repairpal.com > Problems > GMC > Sierra 1500
you can hear the transfer case kickin in, but the front wont lock in. replace the actuator and ... service 4wd indicator came on after trouble trying to engage 4wd.

Aug 11, 2015 | Cars & Trucks

1 Answer

Was driving my 2004mountaineer tool light came on and jumped out gear now won't do nothin bug grind


There are several possibilities. If you have a 4x4, the unit could be between the 2 wheel drive and 4 wheel drive modes. There is also a 4 wheel drive low and 4 wheel drive high mode. On some models the selector switch is similar in appearance to the blower motor selector switch. Someone could reach for the blower speed and turn the 4 wheel switch instead.

Another possibility can be a burned out led indicator switch on models which use electric shift solenoids to position the drivetrain between 2 and 4 wheel drive. The voltage gets messed up because of the burned out bulb and the shift plunger does not go into the correct position.

Have your error message read by a scanner.

May 23, 2015 | 2004 Mercury Mountaineer

1 Answer

92 chevy 4x4 won't go into four wheel drive sometimes it will when the light is on on the selector but won't when the selector light is off


Most likely it is the fault of the vacuum actuator under the battery try that has a ripped diaphram. The vacuum switch on top of the transfer case allows oil to be sucked up the vacuum lines and in turn ruins the vacuum actuator. You should see oil inside of the actuator if this is occurring. Recommended to replace both of these items. Good luck, hope this helps

Feb 01, 2015 | Cars & Trucks

1 Answer

Four wheel drive service system warning came on


Your solenoid is stuck causing this issue it's not letting it back to 2wd faulty actuator

Mar 02, 2014 | 2008 GMC Sierra 1500

1 Answer

Service 4 whell drive on dash I replaced front actuator and encoder motoron gmc sierra but still no 4 wheel drive I also changed the dash switch all fuses are good what ami missing?


The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code(s) stored in the transfer case control module will be of assistance in determining the exact fault causing the message to be displayed.
I have found out that usually the two ground wires that are attached to the frame right under the front of the driver's door is the culprit that causes the 4wd selector switch in the dash to go bad. Chevy had the bright idea of applying the undercoating and/or not cleaning the point of contact of the ground wires before they bolted them to the frame therefore overtime moisture, dirt and corrosion affects the contacts of the threads of the bolts which are the only source of ground the two sets of wires have. There are 2 things you will need to do. First you will need to take the bolts out and use a wire brush to clean down to the metal of the frame as well as the bold threads and ends of the wire attachments and then reattach the ground wires to the frame (time to complete - less than 5 minutes). Second you will need to replace the 4wd selector switch in the dash. You can purchase this online from Amazon (Dorman 901-062 4-wheel drive switch for $31.15 - no tax or shipping and handling). To replace, gently pull the outer trim of the dash out by using just your fingers. You do not need to completely remove it, just pull it out far enough so that you can pull the old switch out of it slot. Then unplug the two plugins located in the back of the switch. Plug them into the new switch and push the switch back into the slot and then push the trim back into place (time to complete - less than 5 minutes). This should take care of your problem. Most often, people make the mistake of just switching out the dash switch and when that does not correct the problem they then replace the more expensive and time consuming actuator motor and location indicator on the transfer case that does not need to be replaced. I should point out that when the Service 4WD light comes on

Jan 17, 2014 | 2000 GMC Sierra

1 Answer

Replaced actuator but still no lights indicating 4 wheel drive or the mechanicle part,tested all four light bulbs all test good. I am not sure if there is a switch on the 4 Wheel drive lever under the...


you also have a 4 wheel indicator switch that tells you when you are in 4 wheel it is usually installed just above or near where your actuator is in the axel

Nov 20, 2010 | Chevrolet 1500 Cars & Trucks

2 Answers

1999 tahoe 4 wheel drive trouble light is on. Wont go into 4


my 2000 chevy tahoe 4wheel drive light indicator wont stay on even when i tryto angage automatic 4 wheel

Dec 24, 2009 | 1999 Chevrolet Tahoe

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