How To Replace Transmission Cooler Lines On A GMC Yukon Denali

Brian Eslick from How to Automotive www.howtoautomo... takes you step-by-step through the process of replacing the transmission cooler lines on a 2007-2014 GMC Yukon Denali with 6.2 L engine.
Affiliate link mentioned in the video for ACDelco 25999420 GM Original Equipment Automatic Transmission Fluid Cooler Inlet and Outlet Line amzn.to/2pd86Yj
Affiliate link mentioned in the video for ACDelco 15779543 GM Original Equipment Automatic Transmission Auxiliary Fluid Cooler Inlet Line amzn.to/2pZrkAF
Affiliate link mentioned in the video for Genuine GM Fluid 88861037 DEXRON-VI Automatic Transmission Fluid - 1 Quart amzn.to/2oZYDVE
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Owing to factors beyond the control of How to Automotive/Brian Eslick, it cannot guarantee against unauthorized modification of this information, or improper use of this information. How to Automotive/Brian Eslick assumes no liability for property damage or injury incurred as a result of any information contained in this video. How to Automotive/Brian Eslick recommends safe practice when working with power tools, automotive lifts, lifting tools, jacks and jack stands, electrical equipment, blunt instruments, chemical lubricants, or any other tools or equipment seen or implied in this video. Because of factors beyond the control of How to Automotive/Brian Eslick, no information contained in this video shall express or imply warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or information contained in this video is the sole responsibility of the user and not How to Automotive/Brain Eslick. #howtoautomotive #AutomotiveRepair

[@eladiorosa4970]

I watched this video because i had to change the same exact line on a 2007 Cadillac Escalade AWD.This Yukon is rear wheel drive and its much easier to replace.On the Escalade it was very hard to remove the lines with all the extra parts for the AWD system in the way.Running the new line back in was so frustrating I almost quit.I was using ramps and jack stands to do this.It's my wifes car and she needed it in the morning to go to work,so I just kept on trying to get the damn line trough.I was doing this at night on my driveway.Finally after what seemed for ever(about an hour)I got it trough.This video helped me a lot,but just a WARNING to anybody trying to do this on an AWD vehicle,it's much harder.Thanks for the video.

[@phlerm]

Incredibly helpful video. Showing the details of the lines from front to back was HUGE. I just added the auxiliary transmission cooler to my 2010 Suburban (did not come stock). This video showed exactly where the lines run, so it took the guesswork out of the job for me. It took some time, but it's installed and works great. Thank you so much!

[@222Dargent]

Such a great video. I thought about paying someone but going to do it myself with a bit more confidence after watching your video

[@swathdiver489]

Sure is a lot of room down there without the front axle!

[@8SEC6SPD]

great video and tips to!!! thank you for taking the time to do this video!

[@nocturnalmotors]

If you have a front differential, drop the right side nuts and lower control arm to shock bolts. This will get you just enough slack to get the longer cooler pipe up through the hole in bumper.

[@boyce1204]

On the AWD Denali, I would suggest removing the front bumper completely, its not that hard and makes things much easier. As the drive line and front axle make it harder.

[@ELBUYTRE]

Thanks a Lot.. You are the Man .. doing it with one hand .. once again.. Thanks

[@ranahamayun9919]

You doing very good job 👍 👍👍👍 nice video 👌 👌👌 👌 Very good teaching 👍 👍👍👍 Thank you so much for your video

[@HowtoAutomotive]

rana hamayun thank you!

[@ricdenali4213]

Detailed instructions!!good job

[@HowtoAutomotive]

Ric Denali thank you!

[@MrPami9899]

for real, just for a cooler line, you have to do all of this, looking forward to do this on my explorer

[@shanegibson1689]

Thanks for a great video. What is the torque spec for the 13mm bolt on side of the transmission? Thanks.

[@danielsimpson8929]

Just a heads up. There are two hose types from the Trans to cooler. Denali tow package (heavy duty version?) and denali regular. I have the tow haul mode, hitch, trailer connector, so I figured I had the tow model. Wrong! LoL Maybe the tow model has an integrated brake control and tow mirrors? Anyway thanks for the video.

[@barnz008]

Thanks for the how-to. Mine are also shot so I'll need to replace them. But I'm not going to take my time getting the old ones out, just cut them in 2-3 spots to make it easier. Getting the new ones in on an AWD Denali sounds like it's a PITA.

[@HowtoAutomotive]

Funky Tape i’ve done it that way. It does save time👍🏻 thank you for watching!

[@dabossfraga9493]

Funky Tape what do you mean by cutting them lines in 2-3 spots to save time? How do i do that? Mines are shot too and started to leak little heavier lately but i dont wanna go thru the whole proccess of replacing them.

[@Erichhh]

@@dabossfraga9493 The hose material GM used for the flex parts of the line is garbage. I replaced it with 30R9 fuel injection hose and worm drive stainless hose clamps, and it is bone dry. In fact, I am replacing the lines due to rust now - and I will cut the new hoses off and clamp my 30R9 ones to the new lines.

[@dabossfraga9493]

@@Erichhh oh cool thanks bro.

[@Erichhh]

@@dabossfraga9493 Glad to help! I carefully cut the crimp sleeves and took the new hoses off the line assembly and it was a breeze to install. Then I clamped my existing hoses to the new lines, and made sure all of the clips were secure. Very easy job. The lines have little barbs to help the hose grip, and with a small worm drive stainless clamp it is leak-free & tidy.

[@For-da-free]

Great Vid! Im also interested in the cooler and the lines. I have a 2007 Escalade Esv and i checked on Amazon link in your bio and the lines also fit my truck. Question: Do you know the part number for the cooler itself? I will purchase the lines off Amazon but want to make sure i have the right cooler itself. Thank you and ill keep watching.

[@pjflores5599]

So you don't have to pull the motor mount like you do on the engine cooling lines! Good!!!

[@youarerightboss]

Thank You, Brian.

[@HowtoAutomotive]

Thank you for watching!

[@Martin210670]

Thanks for the great how-to! Is it the same procedure and part # for a '07 Suburban 1500 w. the 5.3l ?

[@YungSnazz]

Great video

[@vernwhite568]

I would have taking the grill off as this is what i did and it went way faster but good video

[@yourlocalpreppy]

How did you get new line started in opening? Your video just skips that moment! I cant get enough slack to get longer line feed through that little opening. Did you remove sway bar or something else for more clearance?

[@razor141]

for real that is really the HARD part. just did this job on a escalade. Finally after swinging like an ape and throwing VooDoo bones, it went in there. Thanks for nothing.

[@willhector9730]

😂right....that's where I need the most example n he just showed it already in like it was a breeze....I'm on day no. 2 trying to get that line up in there

[@jasonhill3653]

Just did my 4x4 Tahoe. Pain in the ass. I cheated and cut the plastic under cooler in front. Seemed to help alot.

[@HowtoAutomotive]

Jason Hill it is a pain. Thank you for watching!

[@shanzt007]

My 2007 Hummer H2 trans guage is going up and down on cold start. The fluid temperature is like 190-210.. the guage is acting crazy. I replaced the temperature switch.. it’s still doing it. What do you think?

[@felixgange1715]

Awesome job 👍🏽👍🏽👍🏽

[@zebragnzls]

Ok we’re doing this now and we lost the horseshoe clip and we’re having trouble finding the part number for it or a hood pic of it to buy a new one

[@NORCALPYRO_]

Wheres the front diff at did u take it out????

[@scottiemurdaugh]

hello. you showed the connections are at on the 1.trans 2 oil cooler 3. radiator, where do is the 4 location?

[@Confidential_Champ]

Good vid

[@HowtoAutomotive]

Tee Jay thank you and thank you for watching!

[@d0mb0n16]

Would this be the same on a 2008 Escalade with the 6.2L AWD?

[@AnowarHussain-rw4wq]

hi sir why you replace cooler line? any problem ? please tell me

[@HowtoAutomotive]

Anowar Hussain leaking at the clamps

[@tywanbrimage8388]

Hi how long did this job take

[@elponce]

my 2010 yukon has no cooler behind the grill🤔🤔?

[@uptownsfinest1598]

Does this cause the vehicle not to drive asking because someone has one for sell and says it needs to be towed . I know I shouldn't buy a car that needs towed but if that is just the problem it would be a good deal but man I don't want to get ripped off its a 2008 Denali

[@duramax78]

That’s different than my 2009

[@agungwibowo1352]

What was the problem so you decided to change this cooler line, I have my 2500hd sierra and the transmission temp is always increasing from the engine start. Once it reach 100deg C the engine check light on and the transmission temp still increasing until 138deg C. When I check with the OBD scan it shows U0101 code which is TCM connection lost. I am assuming that the cooler is not functioning in my car. how to check that I need to change the cooler line or I need to change the solenoid inside the transmission before i do some unnecessary step. thx

[@MrJoker-be5eu]

Mostly leaking in the cooler lines that ends up to replace them

[@dagobertosepulveda425]

Did you remove the transmission oil to change the lines

[@HowtoAutomotive]

No I did not. If you think your vehicle is due for service it would be a good time to do it.

[@03hiredgun31]

Was installing a trans cooler. Engine was warm. And when i disconnected return line, small amounts of coolant trickled out. Is this normal?

[@HowtoAutomotive]

Alx FiveOnine if it ran out of the transmission cooler than I would say no that is not normal and the cooler is most likely the problem

[@davidpena2615]

Question do any of these lines carry water?

[@HowtoAutomotive]

David Pena no only transmission fluid or engine oil.Depending on which line are talking about

[@AP9311]

I'm surprised by that transmission had two coolers, by radiator and cooler fins. Why two? I believe radiator is sufficient to cool the fluid

[@Confidential_Champ]

Josh Benney if you buy the Yukon Denali with the 6.0 it's part of the tow package.

[@alwcurlz]

The purpose is to maintain the correct transmission fluid temperature. In super hot climates and towing, the radiator cooler isn't enough to cool the transmission. So the added cooler is required. But the transmission fluid can get too cold If it passed only through a cooler out front and back to the transmission. The fluid could gets too cold during winter, causing the transmission to not function properly. By running fluid through the radiator, the fluid will always be at least the operating temperature of the engine which is perfectly fine for the transmission.

[@willhector9730]

I got a easier way to get the long line back in there fellas......just cut out the plastic where that line feeds thru.... GM should've done it themselves but it workd perfectly....no more struggle

[@TheClascaster]

How do u pour transmission fluid when u are done?

[@HowtoAutomotive]

Cesar Lascaster you fill it through the dipstick tube. So you remove the stick put a skinny funnel in the tube and Fill it there.

[@rochelleangeletti1024]

Somebody time me this was a easy fix shit seems like he replacing the engine in this dam video

[@jamareehenson2407]

How do you get to the back of the lower cooler line on a 01gmc Jimmy

[@HowtoAutomotive]

Jamaree Henson that hard to tell with out seeing it

[@jamareehenson2407]

Are you located in PA

[@HowtoAutomotive]

Jamaree Henson I’m in San Diego

[@jonlisanovara]

If it's two lines why you have to disconnect 4 ends from the cooler

[@m1a1abrams93]

replace all lines. But I feel he should have taped the ends to keep dirt out of lines. That way it doesn't enter the system.

[@MrPami9899]

Why GM put such a big engine in this suv!!! wow

[@HowtoAutomotive]

STEEVE DAVID Nicolas the Dinali is considered the high-end model so they put the big engine in it.

[@cjls1z28]

Why not? The 6.2 is great. Who wants a v6 Large Suv?

[@FirstLast-we8cb]

Great video

[@HowtoAutomotive]

First Last thank you and thank you for watching!

[@FirstLast-we8cb]

Fast reply! My 08 Denali Yukon is leaking bad. I'm not sure I'll replace the lines. I'll probably do a custom TrueCool 40k setup like my old Yukon. Your vid was great to show where the stock lines go! Subscribed!

[@HowtoAutomotive]

First Last thank you! Upgrading may be a good idea especially if you're towing.

[@FirstLast-we8cb]

How to Automotive Well the parts on my shelf are for a ctsv supercharger ;-)