4x4 ain’t working plz help
- Thread starter bittersweet1966
- Start date
Mooseman
Moderator
Year, model and what exactly are you doing to have this happen. GMT360 don't have push button 4x4. It's a rotary dial.
Mooseman
Moderator
Moved to proper section.
Could be the encoder motor. You could try this thread however it's specific to the GMT360 but is similar in operation.
4WD not working? Step inside.
Could be the encoder motor. You could try this thread however it's specific to the GMT360 but is similar in operation.
4WD not working? Step inside.
Sierra? Yukon? Specific details are important.
When you say it "clicks", where are you hearing this click come from??
Do you have any sort of scanner/OBD2 adapter or the like?
I own a 2005 Yukon that very likely has the same system as your 2004 Sierra (not 100% certain of that though)
I think the only thing up front is the front axle actuator/disconnect. I am not all that familiar with that unit as I have never needed to get into that. With many small actuators there are small plastic gears inside them and these can get brittle with age and break. Is the "click" accompanied by any sounds like a small electric motor maybe?
Does it make any difference if you are slightly moving or not?
Mooseman
Moderator
Is the noise coming from the front? Could be the disconnect not completely engaging and grinding the dog gears. The test described in the thread I posted above gives a way to test that.
Most of the switches don't actually switch anything like power etc. Look at a wiring diagram. All the switches do is momentarily apply a reistance that tells the control module what mode to switch to.
Those switches are known to go bad. Looks like that pic is missing the other half of it.
This is a "Close is STILL Good" Article for Chevrolet Silverados that may still prove very useful for your 2004 GMC 4WD Sierra:
Chevrolet Silverado 1999-2006 GMT800 4WD Diagnostic Guide
The heart of your off-road enjoyment is the 4WD, which will get you from point A to point B no matter the terrain. So if your Chevy Silve...
chevroletforum.com
Once a button is pressed and released the switch is out of the picture. It's work is finished. It does nothing else. If the switch did not apply the resistor then absolutely nothing would happen. That is not happening here in this case. A shift is attempted and a noise is being made up front. This is proof that the switch has sent the signal and the TCCM is attempting to do the shift.
The entirety of the selector switch is shown in the picture. Anything else is not the switch.
It’s the universal joint will it cause it not to go in gear an make it click when u push the button
Mooseman
Moderator
Don't understand the question.
Please keep your questions in this thread, not through PM.