rear hatch won't open

You can check these. Swap them out with another fuse of the same to be sure. Same goes for the ECC. You may need to manually open the liftgate to get at the components inside the door to check for wiring problems or bad connections. Check any harnesses that are bent on a tighter radius that will flex when the gate goes up and down.

From what I understand, the latches on these can be troublesome and should get lubricated. Granted I have not run into this problem on these at our shop.

Service Writer, I believe we are getting close, but no cigar just yet. The 06 Yukon does not conform to the Fig.10 diagram ( opening liftgate during electrical panel)....It does have a pull down strap that the owner can use when closing the hatch. This strap uses a small hex head type screw. Upon removing this strap it makes it easier to pop out the bottom panel and expose all of the workings. Once you manual unlock the level you can utilize the push button for the glass or the level for the hatch. I sprayed the workings with WD-40 and noticed while using the remote lock the mechanism appears to wiggle. This tells me that it is not fuse related but more of a failure of the lock/unlock mechanism. Should I continue to track down electrical/fuse or does it also seem it is the lock/unlock mechanism?. I may try to decipher uploading a picture if this will help. Thank you again, we are close. Handshake

here is the picture of the mechanism......

I am having the exact same problem. However, I was unable to remove the panel in fear of damaging it. Please let me know if you find a fix.

Does this look like what you have?

IF there is no noise at the actuator, then this is still electrical, other wise you would hear or see a reaction when the button is pressed. Test for power at the arrows, I expect none. This is the flow chart:

Check for power going into the actuator harness, IF present, I would expect the actuator to be bad.

The rear hatch will open with remote or console button but the only way to close it is by hand. when it opens and after it stops moving it clunks fairly loudly has done it for a while so figured it normal. The latch clicks when either the remote or button are pushed but will not close by power only by hand.

Hello,

It sounds like you have a lift gate power module that is going out but lets check the fuses first there are two. One is under the dash and the other under the hood. Here is a guide to help you and the fuse location with the wiring diagrams for the lift gate so you can see how the system works:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

I would check the module electrical connector for corrosion here is the location of the module as well.

Check out the diagrams (below). Please let us know what you find.

Cheers, Ken

Electrical problem
2006 GMC Yukon V8 Two Wheel Drive Automatic
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I too have a rear hatch problem. Rear hatch latch or rear glass will not open. HELP!!!!

Need to remove the interior panel and inspect the latch assembly,Im thinking a plastic connector broke and the rod wont release. Can you hear it make noise when you try to release it with the button?

Yes, panels removed it sorta wiggles when I attempt to lock/unlock

Try manually pulling on the cables where they hook to the mechanism to see if you can make them release the latch

The black arrow is able to be moved to lock or unlock the mechanism...the red arrow does not rotate when the button is pressed to lock or unlock...it does wiggle when the lock/unlock button is pressed.

The two cables above the actuator, try moving them to se if the latches will release. Sounds like the lock actuator may be bad or the latch assembly (motor)

The black arrow is able to be moved to lock or unlock the mechanism...the red arrow does not rotate when the button is pressed to lock or unlock...it does wiggle when the lock/unlock button is pressed.[/quote:3eea8c8c94] pulling the cables doesn't help. It appears that the lock actuator and motor are one piece. If this is so, then I might try replacing this assembly. Like I mention when you press the lock/unlock the lock actuator wiggles but does not engage.

I understand that. Unhook the cables, i want to be sure that the latches arent keeping the motor from working

I have GMC Yukkon Denali 2005. I recently replaced rear hatch actuator. Actuator is working fine except it locks if I unlock the vehicle and unlocks if I lock vehicle. Please help me to resolve this issue.

[quote:261051a9a9="2CarPro Jack"]I understand that. Unhook the cables, i want to be sure that the latches arent keeping the motor from working[/quote:261051a9a9]

Done....nothing!...Its like the motor wants to turn the mechanism but won't. Sounds like we are getting close...

It sounds like you have the wires switched. (polarity) Check that first.

Sounds like abad motor, just be sure that it is getting a full 12 volts

I did not change any wiring when actuator was replaced. I will take your advice and change the polarity to see if that solved the problem.

There was no wiring going to the actuator?

Actuator connector was never re-wired. After I install actuator, I just plug in actuator connector in it and tested.

In other words. I unplug the actuator, replace with new one, plug-in actuator connector. I did not connect any wires or change the polarities at any point of time.

My electric door locks function properly, byut when I lock them with the electronic key fob, the rear hatch door (I don't have "barn door" rear access), does not lock. I have been told it is mostlikely the "activator". I am very adept with tools, but before tacking this, I'd like to know if there are any special "tricks", pitfalls, etc. Where is it and how do I access it the easiest way? Can I just buy the activator from GMC and replace it myself, or is it wiser to just burn a day and drive it to the GMC service center.

Thanks for your help.

Your subject description is right, actuator

Although I haven't done one, the mitchell manual does give a step by step instruction.

A few weeks ago my charger broke and a small metal piece fell into my lighter port causing some fuses to blow. I checked and changed the one for the lighter, now I cannot locate where the fuse is for my rear hatch or four wheel drive. My husband is in prison and I need Hungary working before the snow comes. please help

rear glass is fuse 13 in dash fuse box. if fuse is good it may be a bad switch or wiring issue. four wheel drive fuse is 24 and 14 in dash fuse box.