Thermostat Replacement Yukon, Tahoe, Sierra, Silverado, Escalade GMC, Chevy 2014-2020 P0128

[@rdcameron9912]

Perfectly described procedure in the video. No wasted moves, no verbose video "ego" nonsense, just straight up good info. Fixed GF's 2016 GMC in 20 minutes. Changed sensor first- issue remained, so a month later did the thermostat, and that fixed it. As Danny suggested, probably best to do both at once. Thanks Danny.

[@ryanbuckner2405]

Being the owner of a 2016 Tahoe that just clicked over 100k miles I have a feeling this is my new favorite KZbin channel 😂. Your videos are incredibly detailed and thorough.

[@dannyjohnsonsgarage]

I’m glad you found it. You may have seen the playlist, but if not here it is Yukon / Tahoe / Suburban / Escalade Owner’s manual Bells & whistles kzbin.info/aero/PLIjr-uSYDZi7J7EQ1ErTn1Yzi6ET_3Ssr

[@mikekrog856]

I just watched 5 videos on this procedure and yours was the most professional. Nice work!

[@michaeltirpak6723]

I did your procedure step by step as well worked 🙏.I was also told by the dealership that it would be 1200$,And this is after I had it serviced by them one time,had 0 issues 0 check engine lights,had very extensive and service record by previous owner (by different dealerships) well maintained beautiful 18 Suburban,I only needed a oil change that was due by oil life dash ,but was talked into 1600$ of “preventative maintenance “ love my vehicle and lacked mechanic knowledge at that time,Have had to take it back to them about five times since that “maintenance “ was done,from 3evap leaks to repair of my rims that they damaged and a/c loud noise after they replaced filter,also my battery was stolen and replaced with a AAA Battery that they are blaming AAA for because it was towed to dealership by them. So when this code came on they claimed that they didn’t touch that area and quoted me 1200$ masked my rage walked off and saw your video shocked at how cheap the part sensor cost so I bought the housing as well for “preventative maintenance “😂as well worked like a charm .thank you 🙏

[@wadekillough5004]

Thank you! Excellent tutorial for this newbie. Took me 45 mins with test drive. Saved me much $$.

[@supersamdotcom]

I did this today. Thank you very much for this video without your instructions I would not have a been able to do this myself. I really appreciate the time you took to put this video together. Just a small note that I did not drain out as much coolant as you did. I just let it drip all over the floor and then I refilled it after I was done.

[@KMedchill1]

Bravo sir! I’m not very mechanically inclined and this was easy to follow. 35 minute change problem solved. Saved me a bunch of money! Thank you!

[@jorgequiroz5720]

Awesome Video, very detailed, and easy to follow. Saved me alot of $$$. Took me about 30Min to complete the thermostat replacement on my 15 Yukon XL 5.3. Only thing was I had to install an aftermarket because all OEM are in backorder for some reason.

[@ragoff]

I just replace my stat, followed everything to the T and almost all of my coolant drained, never really leveling out. Not sure what I did wrong but all together now with new coolant. Good to go, thanks

[@johnp8120]

I just watched 4 videos on this procedure, and the thermostat on yours is in a totally different place than the previous videos.

[@PaulWeezy50]

Did you check the year of the vehicles in the other videos?

[@manueljuarez1948]

Your video saved me $1,100!!!! My local dealership quoted me 1200 for my 2016 Denali. Bought the thermostat and some coolant....$81 bucks and thirty minutes. Thanks!!!

[@flyonawall6521]

Were they wearing bandit masks when they quoted you?

[@manueljuarez1948]

I laughed and hung up! Unreal!!

[@TheJackson360]

Dude that is ridiculous to charge that much

[@j.p.kelley5179]

I have an almost identical '15 Yukon Denali and had the same issue. Thank you for the video walkthrough because your solutions fixed the problem.

[@mlwittman]

I am not a mechanic by any means. This video was step by step and idiot proof. Thank you for a quality video on how to replace my thermostat. 1:13

[@seanflynn3988]

Lol just reading a lot of the comments.. there right BROVO I just did the hole job seams to be ok I tried just the sensor first but the problem came back so I the thermostat and did the full job 🤞🤞this the wife’s truck for the 3 kids need this baby to stay on the road thanks Danny.

[@awfulmongolian]

I am replacing mine tomorrow. Glad I came across this video, very helpful, thanks!!!

[@jacobgreene8195]

Excellent video! Straight to the point and easy step by step.

[@cbrunson11]

THANK YOU(IN ALL CAPS) YOU WERE GREAT AND SAVED ME FROM HAVING TO PAY 200-676+ DOLLARS THANKS AGAIN BOSS.

[@mylunwhite5212]

Bro I'm telln ya. Buddy was tryna charge me 606 fa this smh ain no way

[@PaulWeezy50]

​@@mylunwhite5212TAXIN' taxin'. 😂😂😂

[@tmattox614]

I think I have to do this to my 2018 Tahoe and the way you explained it was flawless and I'm taking it that it was a 30-minute job cuz the video was only 10 minutes but appreciate your video great job

[@AngelaWalton-c3z]

Did you wound up doing it ? I was just quoted $1100 , and I have a 2018 Tahoe myself

[@MrPattyp84]

Very helpful. Could have brought the vehicle in for warranty, but for 100 bucks i did it myself

[@joshbrackmann2417]

Very informative and straight to the point. Love it!

[@celosneed]

Dude!!! This video was extremely helpful and on point. Thanks for taking the time to help people save money!

[@user-fg4xq7le7r]

He is not your dude. He has a name or sir

[@JakeMiller-wc6yh]

Excellent instructional video. I replaced both the sensor and the thermostat. It ran fine for about a week after the sensor. Just changed out the thermostat. The fan is still running. Do you have any suggestions?

[@JakeMiller-wc6yh]

Think I got it. I skipped a step. Disconnected the battery, gave it a minute, reconnected and all good.

[@jeremydenison5956]

Thank you for this video. Just saved me about $500.

[@wllmhstn]

Thanks for the video, replaced my thermostat in 10 min because of you

[@stuffmonger]

Thanks for the vid, did it myself in 45 min

[@scottmccrary1679]

So, I changed the temperature sensor and the thermostat on my 2015 suburban, but my gauge is still reading 160 and the fan stays on after I turned the engine off. Does it only reset if I unplugged the battery terminal? Okay. So I disconnected the negative terminal on the battery. Then, after a few minutes, reconnected it and everything worked great! I checked for leaks and had to top off the coolant, just a little. Thank you for this great video!

[@dannyjohnsonsgarage]

No prob. In the future you’ll also want to disconnect the negative battery terminal when working on anything electrical so it never shorts anything out. 👍🏼

[@terrygulliford5308]

Thanks for the great video. Made changing mine on a cold February Michigan day very easy.

[@ivetteortiz3737]

I changed the thermostat and its still doing the same thing, the code it was giving was for the thermostat thats why i changed it. i cant even run the AC because it blows hot and i don’t want the suv to overheat. Do you have any suggestions on what could be the problem?

[@dannyjohnsonsgarage]

Did you disconnect the black battery cable to reset the system? I would next look into the temperature sensor kzbin.info/www/bejne/aqjHYaFve5tgY7Msi=9KGatLtFV0SA1qlg

[@kevinverkuil3556]

Thank you. Great video. Saved me a lot of money.

[@natsuj100]

Thanks! You helped me save money

[@brenttarquin2166]

Would this help fix with the fan staying on after the car is shut off? Even though its not over heating? I replaced the thermostat sensor, but it still seems to think the car is hot. The gauge is reading 160 and the check engine light is on. Its giving me a P128 reading on my diagnostics reader. I am wondering if this needs to be replaced as well. Great video! Thanks!

[@dannyjohnsonsgarage]

Yes, that code indicates the car is running too cool, so most likely a bad thermostat that has stuck open and lets too much coolant flow and overcool the engine

[@brenttarquin2166]

@@dannyjohnsonsgarage Great! Thank you for the reply! I will give it a shot this weekend. Thank You.

[@dagoat6549]

My fan cuts on and off from time to time and I replaced the sensor but it still comes on. Could this also be the thermostat I have to change? Because a shop told me I should replace the fan but I’m not sure they are correct about that.

[@dannyjohnsonsgarage]

Yeah, the thermostat sticks open and over-cools the engine. The fan comes on because it recognizes the engine should be hot and it’s reading cold. It’s most likely the thermostat

[@LocalBoyAnderson]

Your video was awesome very informative and helpful.

[@Let_The_World_Burn]

Helped

[@RLTPDX]

Thermostat Housing Bolt [3x] Caution: Refer to Fastener Caution. Procedure Remove the thermostat housing bolts. Tighten 10 Nm (89 lb in)

[@OGChickenFarmer]

Thank you sir. Great video! Helped a ton.

[@OlgaGarcia-p9t]

Thanks for advices

[@Jason-ht6ze]

Are there any benefits to runing a cooler tstat like a 180deg one, i have stage 2 btr cam ,headers,catback on 18 tahoe ? Stock is 202 i believe?

[@dannyjohnsonsgarage]

I have seen my temp pegged at 210 straight up so I think that’s normal. It may be better to run colder but you also need to verify how the rest of the vehicle is designed. It may try to heat the engine up by leaning it out or give you a fault code, so I wouldn’t recommend it without a tune

[@guillermolopez4565]

Thank you for the video. I used it as recently changed the temperature sensor and then at a later date changed the thermostat on my 2015 suburban. However, after the thermostat change the temperature goes high to 210 and above when before it would stay at 180-195. Is there anything that I should be looking at or that I might have done wrong? Thank you in advance for your help.

[@mikebythesea45]

Likely the old thermostat was opening early. Your engine should operate around the 210 mark.

[@jujusayjah]

Hello. Great video sir. Much needed. Will this be the same thermostat part number for my 2016 tahoe?

[@dannyjohnsonsgarage]

Yes it says it will. www.amazon.com/ACDelco-15-11125-Original-Equipment-Thermostat/dp/B01K8BJ7BS?crid=1W7TOBWO5Q5WB&keywords=thermostat+gm+12674639&qid=1666942682&qu=eyJxc2MiOiIwLjk1IiwicXNhIjoiMC4wMCIsInFzcCI6IjAuMDAifQ%3D%3D&sprefix=thermostat+gm+12674639,aps,150&sr=8-2&linkCode=sl1&tag=2004047-20&linkId=f878d8b5f4eda040f9cd11c6ef508f0f&language=en_US&ref_=as_li_ss_tl

[@ryanbuckner2405]

Hey Danny, you say to make sure to fill all 3 areas back with antifreeze but there’s only the hose and the Degasser tank. Are you counting the degasser as 2 because it says front and rear?

[@dannyjohnsonsgarage]

You want to pour coolant into the hose towards the thermostat, into the hose going into the radiator itself, and into the degas tank.

[@ryanbuckner2405]

@@dannyjohnsonsgarage well I just poured it into the hose while it was hooked into the thermostat as full as I could, hooked it back up. Filled up the degasser and everything worked perfectly. It actually fixed my problem. Fan stopped running and having noticed anything weird. Appreciate the response

[@dannyjohnsonsgarage]

@@ryanbuckner2405 it should work air pockets out, but when people fill only the degas bottle and nothing is in the radiator is when it usually causes trouble, so I recommend burping as listed above. Glad you got it going 👍🏼

[@soleslayer91]

​@dannyjohnsonsgarage isent the hose going to the radiator and to the thermostat the same hose?

[@sl9051]

Done , thanks for the video

[@cortmansell7860]

Thank you, Danny!

[@cortmansell7860]

Danny, what would cause a small leak if coolant under the drive side air dam? I replaced the thermostat a month ago. This can't be left over from what spilled.

[@bobbydigerolamo]

Life saver thank you !!

[@michaelcatlin2113]

Spin clamp on top rad. hose has no give for plastic could crack rad. Factory clamps compensate for that

[@joseluisolivarez8376]

Thanks for the help

[@viking4194]

Nice Mach 1!!

[@dannyjohnsonsgarage]

Thanks! I have it’s story if you’re interested kzbin.info/www/bejne/mWquqXeEgrmonLMsi=4UQGnJsNEnpoCydX

[@gerrygwilson2849]

My temp gauge is at 210 and then spikes its way to 260 then if you let out of gas it starts to fall back to 210 isn’t that the thermostat sticking?

[@dannyjohnsonsgarage]

It could be sticking closed. Or you could have air in the system and want to burp it like in the end

[@optimusprime2125]

Could a bad thermostat cause a coolant smell from the vents? Or is that specifically a leaking heater core?

[@dannyjohnsonsgarage]

You most likely won’t smell it from the thermostat, so the heater core or even a leak in the engine can make it smell through the intake vents for the air conditioning

[@optimusprime2125]

@@dannyjohnsonsgarage Thanks for your input, I'm sure the thermostat is pooched anyway, it had the same symptoms as in your video. The dash disassembly for the core is too much for my ADHD lol, to the shop it's going!

[@Chrismckinney1]

Awesome video. Thanks so much I just added a 2018 tahoe lt to my garage and I look forward to utilizing more of your DIY videos in the future. I’ve already sub’d and click the 🔔 that’s how I was notified of this video. I have a engine light on but I can’t remember the code because it’s been in the body shop for several weeks now hopefully you could help me once it’s returned to me. Again thanks for the awesome videos

[@Chrismckinney1]

Yup Danny I left this comment a year ago and now I’m needing this video due to P0128 🤦🏾‍♂️ so glad you’re always ahead of the game

[@jorgesanchez4406]

My Gmc yukon's fan are staying on. I saw your temperature sensor video. Do I need to change both as well?

[@dannyjohnsonsgarage]

I would try the sensor only first before buying the thermostat and housing.

[@matthewbuck7731]

I have a 2015 yukon ive replaced the sensor with an oem unit twice. Still ends up getting stuck bottomed out like a simple electrical issue. If i clear the codes the code goes away and the temp gauge starts reading so its not the thermostat. Any other ideas?

[@dannyjohnsonsgarage]

I can only imagine it’s the electrical connector maybe at the plug

[@jnsbsbwhb]

My radiator fan was staying on after I turned off my Tahoe, so I replaced the temp coolant sensor and it worked for a few days but the fan started staying on again.. would anyone know if I should change the thermostat or could it be a relay or a fuse?? Thanks in advance..

[@dannyjohnsonsgarage]

If the gauge is reading zero when warm, it’s most likely the thermostat is bad and is over-cooling the engine.

[@alexpellman8637]

From what I can tell this is a 194° thermostat. For Danny or anyone else that’s used this one did you notice a drop in fuel economy. What I’m reading online it’s better to stick with the 207° thermostat like oem

[@dannyjohnsonsgarage]

This is a GM OEM thermostat and the engine temp stays at 210 as it’s designed. If it runs cooler the fans may kick on again and run continuously thinking something is wrong

[@alexpellman8637]

Okay perfect thanks man!

[@coreydragus]

did this today and now my radiator fans wont turn on :{

[@jamesjonsy]

nice.

[@Mr_DYK]

Worked and I have zero mechanical skills

[@watchthetriple8224]

Easy peezzzey lemon squeezy

[@williampitts1883]

my engine does not look anything like the engine you have in the thermostat video