2016 Yukon - Rear Washer Pump

[Mercs2016Yukon]

I have a 2016 GMC Yukon Denali. The rear window washer fluid is not coming out. When I try to spray the rear wiper fluid the wiper comes on but no fluid comes out. There's no sound of the pump whirring. I've seen some videos of disconnected tubing creating leaks so have taken out the rear storage area to check for fluid but nothing there. I've also tried to run it and check under the car for leaks, but nothing. I've checked the fuse, and that's good. Also, based on some research I've done, I've also checked the sprayer tip to clear any clog. I will also note that the front wiper fluid works fine.

I'm at the point where I feel I'll need to replace the pump, however, I've been searching and can't find any reference info or videos about the rear wiper pump or it's location (which I'm assuming is attached to the wiper fluid tank, since the front pump is located there).

If someone has experience with this and can offer some insight, or point me in the right direction, it would be greatly appreciated.

 

[olyelr]

I believe there is only one pump, the one up front. It pushes the fluid to the back.

 

[Fless]

FWIW Two different ones are shown on Rock Auto; one with two pumps on the reservoir, and one with two holes for the pumps. Why not look at yours to see what's there now?

Go to www.GMPartsGiant.com and enter your VIN, and search for (don't buy) your part number there. Then do an online search for the part number.

 

[Doubeleive]

I believe there is only one pump, the one up front. It pushes the fluid to the back.

Incorrect....
there are two pumps 1 for the front and 1 for the rear.
they are both attached to the washer fluid reservoir tank
accessing it may require removing the spare battery tray and the drivers front wheel splash guard
just depends, I have not done one a k2 buy on my gmt800 I could remove the bolts holding the tank and drop it down enough to reach the pumps and harness from directly underneath it.
they have a wire harness and the pump is inserted into the reservoir and is held in place by a rubber grommet/seal

 

[Mercs2016Yukon]

I believe there is only one pump, the one up front. It pushes the fluid to the back.

Thank you for the reply

 

[Mercs2016Yukon]

FWIW Two different ones are shown on Rock Auto; one with two pumps on the reservoir, and one with two holes for the pumps. Why not look at yours to see what's there now?

Go to www.GMPartsGiant.com and enter your VIN, and search for (don't buy) your part number there. Then do an online search for the part number.

Thank you

 

[Mercs2016Yukon]

Incorrect....
there are two pumps 1 for the front and 1 for the rear.
they are both attached to the washer fluid reservoir tank
accessing it may require removing the spare battery tray and the drivers front wheel splash guard
just depends, I have not done one a k2 buy on my gmt800 I could remove the bolts holding the tank and drop it down enough to reach the pumps and harness from directly underneath it.
they have a wire harness and the pump is inserted into the reservoir and is held in place by a rubber grommet/seal
View attachment 480962

Thank you. I'll be getting a new pump and get after this repair. Many thanks for the picture - very helpful.

 

[Joseph Garcia]

On my GMT900, there are 2 pumps. I was able to access mine be removing the wheel liner on the driver's side front wheel well. I can't remember for sure if I had to unbolt the washer tank to access the pumps on the side, but I may have.

Once you are in there, you could swap the electrical connectors to determine if you have a 12V feed issue for the rear pump, or if the rear pump failed.

 

[Doubeleive]

if you have a helper you can get under the vehicle (key-on, engine-off) and have them push the front washer and then the rear you should be able to hear the motor run if it is going to. I looked under the wifes rig, looks like you "might" be able to take that lower bumper bracket off and reach up blindly to the motors, but otherwise looks like the splash guard has to be unbolted and pulled back at minimum, the tank is tunked into the front frame/bumper pretty good.