2008 denlai rear door wont stay oepn

SOURCE: rear gate (barn doors)

Climb into the back of your Yukon, using a apholstery tool (looks like a bent screwdriver with a claw on the end) or a putty knife and pry the bottom of the inner door skins off cut a 6 inch gash in the clear plastic to expose the door handle mechonizims. spray brake cleaner on the inner latch to clean, then using penitration oil to unsieze. Grab the long metal rod and work it up and down...the should open. repeat to the other door if it will not open as well. I had to replace my barn door inner latches on second barn door. (the door that opens last) with safari barn door latches. I got them from a wrecking yard cheap. ($15.00) to replace at GM....over $200.00. The wrecking yard told me the latches wouldn't work, but I look at the Safari latches and they were identical. My barn doors work perfectly. Hopefully this helps.

SOURCE: Rear tailgate wont open

I had the same problem on my 2000 blazer, I peeled back the carpet and cut out a small hole near the mechanism and put a flat head screw driver in there and unlocked it manuallly

SOURCE: courtesy lights (ceiling and door panel lights)

Some lights do that on my chrysler they'll stay on for up to a minute that shouldn't kill your battery. As long as they go off you should be ok

SOURCE: 2005 gmc yukon back passenger doors will not

My wife's 2003 Yukon wouldn't lock the rear doors or hatch, but it would unlock. My problem was the lock relay was bad. There are two relays, one for lock and one for unlock. They are located in the fuse panel on the left side of the console. Open the drivers door and you will see a cover that pops off. Behind this are several fuses and relays. Consult your manual to see which is the lock and unlock relays. They are side by side on a 2003. They pull straight out. I replaced both and they were around $10 apiece at any auto store.

SOURCE: Rear pass. door locking mechanism

I have been dealing with the same problem and I'm a little further than you are. You need two people to do this job. Open the front door and it will give you access to the hinge pin. If I remember correctly you can pop off the snap rings and pull the pins. This will allow you to open the door just enough to get the interior panel off the door to allow you access to the actuator. Unfortunately, both my rear door actuators have been done twice in the last 5 weeks, But they are seized in the locked position again. I,m pretty sure its not just the actuators that are bad. Something else is causing this and that is why I'm here. Good luck with that one.