Most Popular K Source for 2021 GMC Yukon XL

Need to test them out on a long trip, but so far so good. They did not rattle like the last set we tried. Hopefully they are sufficient one we get going down the freeway.

Purchased a different set from my RV Store only to find they did not fit my mirrors. Returned them the next day for a refund then ordered these from etrailer. Shipping was fast and delivery was quick. Installation on my 2020 Denali XL was ready and the mirrors fit perfectly. Adjustment was a snap and locked in with a screwdriver. The mirrors took a little getting used to but after a 15 hour road trip in two days I have become accustomed to them and absolutely love these mirrors. After arriving at our destination popped the mirrors off, put them in their storage case, and stored them in my RV ready for our return trip next week.

Click to Enlarge

I use these on a 2001 Yukon for towing a camping trailer. The fit is so tight it is extremely difficult to install them. I let them warm up in the sun for a while first, that helps a little. Once installed they work as expected. (Taking them off is easy.)

Excellent product. Looks good, like factory equipment. Performs well, no vibration while underway, even at freeway speeds. The only problem I had was during installation. The mirrors came with 3 padded adhesive strips which either had to be removed or adjusted. It took me some time to determine where to place the strips or if they needed to be removed. Until the strips are properly placed, the mirror will not go on the vehicle. I ultimately ended up removing all of the strips for my vehicle. Even then, installation is tricky, but once they are on, the performance is great. Additional instructions that will guide you as to where to place the strips and when to remove them for different vehicles and features would be extremely helpful when getting the mirrors setup the first time.

Giving this a poor rating because I cannot get them to snap on. I yarned on them pretty good, until I thought I would break my mirrors, or these extensions. They are the exact part number for my vehicle. I read a review that said that they were "tough" to snap on unless they were warm. I'll leave them by the woodstove over night and try again tomorrow. I'm afraid that I will break them and not even be able to use them. If I can slam them on, I'll write another review. 2007 Yukon XL.

My order was delivered in just two days..The K-Source towing mirrors were easy to install on our '12 Yukon XL Denali and they look great!! Can't wait to try them out while pulling our 25' Airstream this summer. Thanks eTrailer..

Fit & appearance is OK. But the upper mirror (the controllable portion) wobbles enough to be bothersome. It catches my peripheral vision and distracts me. Moreover the shaking makes it’s difficult to identify vehicles in view. As a result, I primarily use the bottom mirror and try to ignore the upper. One thing I had to get used to was being a little wider than before but I don’t mind. Once I get time, I will try another brand & see if they are better. Nothing here is a reflection on etrailer, which I have found to be good to deal with and believe they have products better than some other websites.

Easy install, factory look, and stable when extended. Great visibility. 2006 Yukon XL.

Won’t stay locked in stoned position

Love these mirrors! Have had them on the truck now for a year and they work perfect and give you a lot more visibility than the standard short factory mirrors. No need for aftermarket extensions with these. Plus they slide out if you need even more visibility but we never had to use that alternative yet cause they work great just the way they are. We tow a tandem axel 7x14 cargo trailer and have plenty of visibility to see backing up and nicely down each side while driving. Much safer in heavy traffic. Installation was very simple and the mirrors bolted right on with exacting fit. I would totally recommend these if your needing better visibility over the small OEM mirrors for towing or just daily driving.

I'm very happy with these. The video made install a snap. I installed on a 2010 Silverado 1500. I did not have turn signals in the mirrors before, but I do now! These mirrors fit great, work exactly as advertised, and are worth the price.

Have held up well after more than a year of use. I feel safer towing and parking with these over the oem and other mirrors I have used

Have used these on our 2015 Yukon XL Denali. They fit and tighten very well and are easy to install. I have them set up as shown in the picture here (horizontal). You can also set them up in the vertical position and I tried that but I lost peripheral view and like them better horizontal. Once tightened correctly they are very stable with no vibration. The material that comes into contact with the backside of the vehicle mirror is all rubber and there is no fear of scratching or damaging paint. I did turn off the feature that turns the mirrors down when in reverse and I don't fold in my mirrors when these are attached.

Product arrived sooner than anticipated. Great product, much better quality than I expected. Have owned other Mirror extensions but these are top of the line; especially the holding mechanism. Always use etrailer...great organization with above average customer service.

The Product does not allow both clips to fasten on the bottom due to the design of the car mirror otherwise holds fine and works.

The Product does not allow both clips to fasten on the bottom due to the design of the car mirror otherwise holds fine and works.

I chose not to go with power mirrors. I'm glad I bought these, the fit is perfect, and the lower mirrors are fantastic to see cars in your blind spot even when not extended for towing. Very happy with my purchase. 2002 avalanche

I love my mirrors thanks etrailer they was simple to put in no hassle at all

Click to Enlarge

This was the longest hitch ball mount I could find anywhere. I used it with a short extension for my 2021 T G so that I could open the back doors without hitting the trailer wheel crank. With my new trailer, Intact Flyer Discover, I don't need the extension and can still open the doors. Works well.

Very good quality, excellent fit, easy to install. So nice to have flat mirror on the passenger side for backing my trailers. Highly recommend these mirrors.

Very good quality construction. Very good fit for a non-custom mount. Thick rubber straps are stretched over the car’s side mirror and hold the mirror well. My car is a 2017 Ford Expedition EL. Note: when you fold in the car mirror the towing mirror partially blocks the progress so that mirror stops early. It is still folded but not as completely as without the tow mirror. And yes, they are two identical mirrors so on one side the straps go up, on the other side they go down.

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

BUYER BEWARE!!!!!! I had great hopes for these mirrors. They look great. They appear to be very adjustable right out package. They fit on my Tacoma securely. They don't interfere with the function of the stock mirrors. Everything was moving along "swimmingly". Then I sit inside my truck to do the final adjustment (moving the actual mirror to get the correct setting and lock it into the "sweet spot"). The new Mirror is very stiff...doesn't want to move. Well, its new...so....Okay, I don't want to ruin anything...so.... No worries, I go get a phillips screwdriver to loosen the back screw a smidge so the friction adjustment can work . Come back start to back the screw out just a smidge...nope...still can't adjust the...wait...unscrew some more....that's not an adjustment screw at all. That just screws directly into the back of the mirror to hold it solidly in place. Worse yet, There is no friction mechanism on the back of the mirror at all. It is one solid piece of plastic. The molded plastic replicates the look as if it has the ability to move, but in reality....There is no way to do small mirror corrections once you have this thing installed. What the Actual people?????!!!!!!???? If you can't do minor adjustments to the mirror while you are in the vehicle, then the mirror is completely useless. I wouldn't recommend this product to my worst enemy. It's a piece of crap. DO NOT BUY!!!! A complete waste of time, money, and shipping costs. Now, I have to incur more shipping costs to send this POS back to etrailer. Hey, etrailer....Do Better next time!!!!

Click to Enlarge

Click to Enlarge

Click to Enlarge

I ordered K-Source towing mirrors.. back ordered but eTrailer worked magic.. I did read one line in the instructions, (DON"T DROP A BOLT INSIDE THE DOOR PANEL) Installation was 20 minutes start to finish with a 10mm deep socket/ratchet and screwdriver. I did NOT remove door panels, you can bend them back far enough to reach all three bolts. Remove the triangle plug on top of the door that's behind the mounting bolts for the mirrors. Remove three 10mm nuts and swapped mirrors. It could go faster with another set of hands to hold the mirror as you install the bolts. Note1. Be sure to use the foam piece that comes with the new mirrors, it's a gasket to help make the whole thing fit. I think that's photo number three. End result, these mirrors do yield to pressure to make them swing back if you're in a tight spot. Road trip is next to see how much they may move. I'm very impressed with the quality construction, they feel/look top notch. These are OEM factory quality indeed. Thanks again Samantha G..

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Works great

Great mirrors and the right size. Thank You

I ordered K-Source towing mirrors.. back ordered but eTrailer worked magic.. I did read one line in the instructions, (DON"T DROP A BOLT INSIDE THE DOOR PANEL) Installation was 20 minutes start to finish with a 10mm deep socket/ratchet and screwdriver. I did NOT remove door panels, you can bend them back far enough to reach all three bolts. Remove the triangle plug on top of the door that's behind the mounting bolts for the mirrors. Remove three 10mm nuts and swapped mirrors. It could go faster with another set of hands to hold the mirror as you install the bolts. Note1. Be sure to use the foam piece that comes with the new mirrors, it's a gasket to help make the whole thing fit. I think that's photo number three. End result, these mirrors do yield to pressure to make them swing back if you're in a tight spot. Road trip is next to see how much they may move. I'm very impressed with the quality construction, they feel/look top notch. These are OEM factory quality indeed. Thanks again Samantha G..

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

it does the job and looks good

Need to test them out on a long trip, but so far so good. They did not rattle like the last set we tried. Hopefully they are sufficient one we get going down the freeway.

Purchased a different set from my RV Store only to find they did not fit my mirrors. Returned them the next day for a refund then ordered these from etrailer. Shipping was fast and delivery was quick. Installation on my 2020 Denali XL was ready and the mirrors fit perfectly. Adjustment was a snap and locked in with a screwdriver. The mirrors took a little getting used to but after a 15 hour road trip in two days I have become accustomed to them and absolutely love these mirrors. After arriving at our destination popped the mirrors off, put them in their storage case, and stored them in my RV ready for our return trip next week.

Click to Enlarge

Look great fit well and should work well for towing blind spot sensor works well maybe too well

Click to Enlarge

Click to Enlarge

Click to Enlarge

Click to Enlarge

Mirrors function as represented. The only concern is that the blind side detection system is "hyper-sensitive" and activates the warning by way of an LED display in the main mirror. This occurs even when there is no vehicle present but when you come within range of vegetation along road shoulders. This function is a bit distracting. Is there a way to adjust the detection camera?

Need to test them out on a long trip, but so far so good. They did not rattle like the last set we tried. Hopefully they are sufficient one we get going down the freeway.