Traded 09 Tahoe for 13 Yukon XL Denali but rear glass issue
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M1Gunner
Full Access Member
Here’s a schematic
Also check where the wiring harness leaves the body and entires the lift gate at the top near the 3rd brake light. That harness is known to to get chaffed and possibly severed due to sharp edges as it is opened closed.
Everything else works like normal?
Also check where the wiring harness leaves the body and entires the lift gate at the top near the 3rd brake light. That harness is known to to get chaffed and possibly severed due to sharp edges as it is opened closed.
Everything else works like normal?
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Yeah, the other button (handle) and key fob to open the whole liftgate works fine, just not the glass with the fob or the button next to the plate.
I checked fuse 44 yesterday for the lift gate and that fuse was fine. Does the lift gate glass have a separate fuse? Since neither the fob or the button next to the license plate work, i am assuming something inside the door panel on the lift gate has gone bad or needs replaced. I still got to check that harness up top too.
M1Gunner
Full Access Member
What I would do next is disassemble the trim from the liftgate and check power & grounds to the actuator
I took it all apart. I am assuming it is the little actuator but I’m not really sure how to get that portion off. It looks like it may have to come with the whole lock assembly ??? Also anyone have any idea what the two single blue and black wires are that are above the gate but not part of the harness?
swathdiver
Full Access Member
Do you trouble code B3265? You need a good scan tool that can read BCM codes.
The BCM controls the liftgate actuator through the rear wiper motor control module.
It's probably just the actuator going bad. but could be short in wiring of some kind, a bad BCM (unlikely) or a bad rear wiper control module. If all the wires look good, are you good with a test lamp?
Get yourself a subscription for your truck at ALLDATADIY and all the how to and wiring will be right at your fingertips.
A Tech2 is as important for working on these things as is a wrench.
The BCM controls the liftgate actuator through the rear wiper motor control module.
It's probably just the actuator going bad. but could be short in wiring of some kind, a bad BCM (unlikely) or a bad rear wiper control module. If all the wires look good, are you good with a test lamp?
Get yourself a subscription for your truck at ALLDATADIY and all the how to and wiring will be right at your fingertips.
A Tech2 is as important for working on these things as is a wrench.
I have a scan tool, but im not sure it will read those B-codes. Its just your general OBD-II reader that scans engine codes.
I think its probably just that actuator itself...all the wires look good etc. Im not sure if you can just purchase the actuator by itself?
Thanks....is anyone familiar with how you take that whole assembly off? or is this done with the 3 that are some type of star tool and screw in backward?
I have never done it, but I would test from the actuator back to be sure that is indeed the problem, when you press the button the actuator should be getting power, if it is getting power then you know it is bad, if it is not getting power then keep going backwards until you find the source of the problem. once you are sure the actuator is bad order the replacement then that should give you a better idea of how it comes off.
I finally got around to digging more last night. The actuator itself is not bad. I found that the 25A fuse in the side of the drive dash for the rear wiper was blown. I put a new fuse in and it worked....only for a bit, then it blew again.
I searched for any broken wires or shorted out wires and cant find any right off.
I searched for any broken wires or shorted out wires and cant find any right off.
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