Radiator Fan on full blast won’t turn off even with car off, not running. How to fix it GMC Chevy

[@PastorLupeGarcia]

Praise God for this video. I pulled up at church turn off my Yukon and the fans kept running. Mine didn’t have the check engine light, but after the battery cable got taken off, the fans turned off. After church I started the vehicle up and everything was back to normal. At least now I know if it messes up again for sure I’m gonna need the temperature sensor. I was so worried that something bad was going to be wrong. Thank you so much again for this video.

[@dannyjohnsonsgarage]

I also did the thermostat at the same time since it’s right next to the sensor. Many have come back in the comments to say the thermostat sticking open was also bad, so I would recommend doing both at the same time and I have a video for it too kzbin.info/www/bejne/bZ6td2iChpiihtUsi=wcGGzKx4Bo2aMkyk

[@fasdboom9209]

Replaced both sensor and thermostat. Turned vehicle on and would do the same thing. Low temp gauge and fans still on after vehicle off. Unplugged negative for 10 minutes and now working nicely. Thanks for the video!! I guess i forwarded too much on video about removing negative on battery. Luckily id didnt fry anything

[@lindy757]

Great video! 2015 Escalade 6.2L: I disconnected the negative battery terminal and installed the new engine coolant temp sensor. Didn't disconnect the radiator hose and spilled a bit of coolant on the garage floor, but not too much. Reconnected the battery. Fired up the 6.2L V8 and as hoped the fan no longer ran on high speed and the AC started blowing cold again. The OAT display in the cockpit read an erroneous 32 degrees with the associated warning about "Possible Icey Roads". No way to reset this in the Escalade, but after 8 hours + the temp recalibrated on it's own to the correct OAT. My local mechanic wanted $500+ for this repair! Great job and thnx again!

[@dannyjohnsonsgarage]

The thermostat can also cause the temp to be below 160 degrees and cause the fans to come on. FYI for the future. Mine also showed 32 degrees on the dash and ice warnings kzbin.info/www/bejne/l3bJmJ6ujMl1j9ksi=a5nWCQ_LiolhJ0ow

[@elainelara3226]

Thank you so much for this information. My husbands 2015 GMC Sierra was doing this, and I found your video and told him and he did it and it worked. You probably saved us hundreds of dollars. Again, thank you so very much.

[@dannyjohnsonsgarage]

I’m glad to hear that! I’m glad you found the video.

[@DeWayneRussell-r9e]

Worked like a charm!! Thanks for the info I had the same problem disconnected the battery and waaalaaa!!!!

[@Fuelie6.7]

My 2016 Denali did this exact same thing at 95k miles right before heading out of town for 2 weeks. I swapped the sensor as the video showed and it was back to normal all within an hour of noticing the gauge was buried. No check engine light for me, but I may have caught it early. Thank you for your video!

[@dannyjohnsonsgarage]

The thermostat can also cause it to happen when they fail and stick open. The engine is running cool so it also triggers the fans. If it continues, see the thermostat video kzbin.info/www/bejne/l3bJmJ6ujMl1j9ksi=zrnnrLbPG0i3a3M3

[@coreyfleming8328]

My 2016 was doing the same thing. I replaced the thermostat and the temperature sensor. After completion, there was no change, fan continued to run and dash temp remained at 160. I disconnected the negative terminal for 5 minutes and reconnected and all was normal. Hopefully this fixes the issue permanently.

[@benjaminakin828]

Mine just did it too. I did what you said...it worked. The only thing different from usual driving is that the passenger in the back seat turned on the heater for the drive. That won't happen again. Ill just keep a socket in the Tahoe incase.

[@rudygonzales3589]

I just replaced both on my 2014 chevy Silverado and still same issue with fan. Does it matter if it’s the positive or negative to do reset?

[@coreyfleming8328]

@@rudygonzales3589 I believe it must be the negative to actually reset the computers. Keep the positive connected.

[@rudygonzales3589]

@@coreyfleming8328 I went ahead and disconnected both for 5 min, looks good so far. Fan hasn’t turned on and it’a been a week

[@ashleythompson2071]

This worked for us too. Thanks.

[@JessicaMoore-r2j]

I have a 2016 Denali and have been dealing with this issue for the last 2 winters. It only does it when the weather is cold. When my fan doesn’t cut off, I turn my car off, let the engine cool for a bit or overnight and then I take it down the road and floor it and hold the pedal down until I get the RPM’s all the way up and my speed as high and as fast as I can get it and the fan will automatically shut off while I’m driving. Then I just let off the pedal and go back to normal driving. This works every time. We replaced the thermostat and the sensor 2 years ago when it first happened, but it still kept staying on so instead of disconnecting the battery so often to reset it, I found a way that I don’t have to anymore.

[@DontBlinkk]

I have the same problem with my 2018 tahoe it only happens in winter and to turn it off i just drive it at noon and it becomes normal until night comes the same issue comes back ….

[@henrymaz1697]

Exactly what I needed thanks. happened to my 2016 Suburban at around 125k miles

[@awatchmanoftrueisrael]

My 2016 Tahoe has this very problem and I looked it up and you brought the solution. Unplug the negative cable for 5 minutes and waaaaalaaaaa it works. Thank you for taking the time out and sharing this.

[@dannyjohnsonsgarage]

That will reset it temporarily. If it continues to come back it will most likely be the thermostat sticking open and the temp sensor is good to replace then too kzbin.info/www/bejne/bZ6td2iChpiihtUsi=7T2WMoTX_BCOnz1g

[@dalehawkins.8102]

Changing the sensor did no good on mine. What did fix it was disconnecting the battery for one minute - this reset the computer and resolved the issue. so, any of you who have this issue - before replacing the sensor, remove the positive cable from the battery for a minute and then reconnect it. This may very well resolve your issue. An auto parts employee told me that cold weather sometimes affects the ECM and this many times will correct it.

[@dannyjohnsonsgarage]

It will reset the system, but if it continues it’s most likely the thermostat that sticks open and overcools kzbin.info/www/bejne/bZ6td2iChpiihtUsi=IuIx-t0uQToSw_g2

[@dalehawkins.8102]

thanks. luckily on mine it totally resolved the issue@@dannyjohnsonsgarage

[@lbowsk]

I only changed the thermocouple on mine. Fixed. Still have the original T-Stat. 2015 Tahoe. ***Did not watch this vid but watched another that recommended doing both at the same time.

[@dannyjohnsonsgarage]

Yeah. The thermostat sticks open and over-cools which also runs the fan. Sometimes disconnecting the battery will reset it and turn the fans off, but if it comes back showing cold for the temp it may not be the sensor but the thermostat over-cooling the engine. Keep it in mind for the future kzbin.info/www/bejne/l3bJmJ6ujMl1j9ksi=qSmu8fME_mUP8wPM

[@lbowsk]

I disconnected the batt first, just to save it. Then watched a vid suggesting that it was the thermocouple and another which suggested changing both. Initially it was showing full cold on the gauge with a hot engine. I only posted this to save the next guy the hassle of doing both if he can't or doesn't want to do both. I'll get a T-Stat from Rock Auto and change that at my leisure (and not raining like mad the day I changed the Thermocouple. Good luck to the next guy.@@dannyjohnsonsgarage

[@phillipbugg]

It worked for my 2016 silverado. Fans stayed on loud and drained my battery after I cut the truck off. Thanks

[@dannyjohnsonsgarage]

I’d watch this video in case it keeps happening kzbin.info/www/bejne/bZ6td2iChpiihtU

[@eddielozada3694]

What a short cool video!! It helped me a lot. Thanks!!!!!

[@nicowijngaarden8546]

It could also be a temp sensor but usually it’s a bad thermostat causing the car to run too cool. This sets a code in the computer. The computer then turns on the fan on high and turns off the ac. All in an attempt to keep the car from overheating. Replace the thermostat and erase the code. This will fix your problem.

[@geeev8312]

How do you erase the code ?

[@bsua2000]

Worked for me! Thank you so much!!!

[@CT--mo3ng]

I changed my temperature sensor and disconnected the battery and fixed my problem but I will keep in mind to also change the thermostat so this doesn’t happen again. My 2018 Silverado only has 58000 miles 🤦🏼

[@dannyjohnsonsgarage]

Here is the thermostat portion if you need it kzbin.info/www/bejne/l3bJmJ6ujMl1j9ksi=f7v2_F77RAP1J3MH

[@robb5233]

Glad I found this! I replaced the coolant sensor with a Duralast one from Autozone before seeing this video. The problem stopped but then it returned. Could it be the sensor? Maybe I should have gone with the more expensive ACDelco? Or do you think I need to replace the thermostat next? Thanks in advance!!

[@shawnfoskey2596]

Having the same issue as well did you find a fix?

[@hg5508]

Having same issue.

[@sampierson402]

same issue

[@jumacc4167]

Having same problem I replaced coolant sensor and thermostat problem came back idk what it can be

[@chuygav]

I seen a few people had to replace the thermostat as well

[@txhuntan2324]

Replaced sensor and disconnected the battery for 2 minutes after. Problem solved! Thanks

[@dannyjohnsonsgarage]

That will reset it. If it continues to come on, I’d look at the thermostat and sensor kzbin.info/www/bejne/bZ6td2iChpiihtUsi=IuIx-t0uQToSw_g2

[@FredClasson-hy7nm]

I replaced my sensor, thermostat, temperature relay, and replaced the ECM (which was supposedly set to my truck's VIN and tried the key learn steps but would not work), and still the fan issue continues. I pressure tested the system and vacuum filled it (should not have any air locks). My 2016, 5.3 Silverado truck would not turn over with the replacement ECM, the check engine flashed, even though the security anti-theft lights went out, but it again started with the old ECM. With the original ECM the brakes and stability warning lights frequently comes on as does the check engine light, but it starts. It took 8-10 days to get the replacement, pre-programmed ECM. When left connected to the battery, the system drains the battery. I would appreciate any help or suggestions given.

[@chrisdarcy8998]

I'm getting this, 2015 Tahoe. Also, hopefully coincidence, the A/C quits cooling at the same time! Does any one have that issue too?

[@igchocolaterose_3173]

Yes I am right now with my 2015 Tahoe

[@switzerlandofamericajeepad297]

Different fan. Check your blower motor resistor.

[@damiansgaragebuilds7663]

Any luck our ac isnt working either and the temp gauge is at 160

[@chrisruiz1215]

Yes. I noticed the same on my 2016 Tahoe

[@lh1998]

Same with my Suburban.

[@chicagosdnainfo8842]

Does this work on a Canyon gmc

[@sampierson402]

same issue - replaced ECT sensor - problem has returned two weeks later - investigating now

[@dannyjohnsonsgarage]

Let me know what you find. It may be limp mode for another sensor or issue or perhaps a bad circuit is burning up the old and new sensor perhaps

[@brentglasgow2789]

Same

[@XLETHALakaDjDaveVIBE]

When I disconnect battery and connect battery, the issue is fixed without changing sensor. Then the issue returns. ????

[@TexasMindBodySoul]

Same. It took a month for the issue to return. BUT now the a/c is not cooling too.

[@deenofmean7501]

Same issue. I don’t disconnect the battery. If I start the truck, let it run for about 2 seconds, then turn it off it stops, sometimes I have to do it 2-3 times. I replaced the sensor, then the battery went bad. It kept getting super hot (smoke and everything within seconds) so I replaced the battery and the connected fuse box. That fixed the issue for a couple months. It started again after a rainy season and some water puddles. It’s been doing it for about 2 weeks. The check engine light was on for about 1 week then went off. Now I notice my ac isn’t working.

[@stevegiunta8532]

Hey Danny what spark plugs do you recommend I put in my 2001 cobra it's a fresh motor

[@SlaneVintageModern]

Had this happen in the 17 Tahoe. Rained real hard one day as we were driving. Then the fans come one while driving and stay on when motor is off. The fans would not turn off. So I trick the system by starting the motor and immediately turning it off. It turns the fan off every time like that. But as soon as you turn the engine back on the fans run constantly again. Did this for like a week and then they stop running constantly on their own. Then one rainy day it happens again. Maybe a coincidence. Haven’t fixed it yet because ATM the motor is down to the block, fixing the lifters and cam. I will change the thermostat and sensor while I do the pump. Should fix it. Also had to replace the transmission after 130k miles. Car companies are making junk. Designs only last as long as the warranty. Car companies = parts/service companies. Buy used and just rebuild the whole thing with money you save or lease and give back after warranty.

[@dannyjohnsonsgarage]

I just did the cam and lifters as well. I was afraid transmission was next as well kzbin.info/www/bejne/mYjEqqyQfLOMiKssi=KNc7Emej7Iw2pHkO

[@dannyjohnsonsgarage]

Went with a Toyota Sequoia as well Why I traded my GMC Yukon for a Toyota Sequoia kzbin.info/www/bejne/mX_QaqWqrZV6frM

[@swink49]

Mines doing the same thing. But no engine light but reading 0 so I guess I just change it

[@pokerstar81]

We did this and it worked for a bit. Have you found any other things to check for. Next is the plug going to pull it and check to see if its messed up

[@dannyjohnsonsgarage]

If the sensor isn’t the fix and you don’t have a check engine light and don’t think it’s the plug, the thermostat may stick open and over cool or stick closed and overheat. Not as likely kzbin.info/www/bejne/l3bJmJ6ujMl1j9k

[@portercon]

Same as below in 2016 Tahoe. Changed out temp sensor. At first, no change, then it seemed the ECU reset itself. A week later, problem is back. Im seeing other possible causes as fan motor relays ( where are they??-not in fuse blocks) , high pressure switch, ECU failure, thermostat. Thoughts?

[@dannyjohnsonsgarage]

It’s generally the thermostat if the sensor is okay. kzbin.info/www/bejne/l3bJmJ6ujMl1j9ksi=LX34aWDmTYdKY-gY

[@edc120912]

Quick tip! If this happens to you and you dont have tools on you. Just leave the truck on for about 5 minutes and then turn it off. Should make the fans turn off.

[@dannyjohnsonsgarage]

It will also kill your battery if not addressed. Pulling the negative terminal helps, but in the end we are finding it is the thermostat that is failing causing the car to realize the Tranmission is hot but not the coolant system and it goes into limp mode. The thermostat is stuck open in most cases and over-cooling kzbin.info/www/bejne/l3bJmJ6ujMl1j9ksi=_RsaX35abPAikCRi

[@Coldsteel0425]

I have a 2016 and just replaced the temp sensor, check engine light went away and it quit.. a week later started doing it again.. so I went to the next recommended step and replaced the fuses that go to the fans.. still doing it.. not sure what it is at this point gonna run up to the auto parts store and hook it up to a reader to get more information

[@dannyjohnsonsgarage]

It is most likely the thermostat. See if the temperature is reading zero (looks like 160 on the gauge). It should be 210 when warmed up. The thermostat sticks open and overcools. Here is how to replace it kzbin.info/www/bejne/l3bJmJ6ujMl1j9ksi=RH1jOby84IfCxxb5

[@robertoortiz85]

Same thing happens with our mustangs if your temperature sensor fails or you forget to plug it in…the pcm turn on high-speed fan

[@iamsantiagomora]

We recently bought a 2015 Chevy Silverado and it started doing that and we changed out the Coolant Sensor which fixed it for awhile, but it’s started doing it again which when it does my Dad will squeeze the Radiator Hoses and after a day or two it goes back to normal, we’re not sure what it might be. We also got a another code besides the P0128 being the P0175 System Too Rich Bank 2

[@dannyjohnsonsgarage]

I would look into the thermostat if it is still showing low temperature kzbin.info/www/bejne/l3bJmJ6ujMl1j9ksi=_YAKgsOK7X2a9Ytd

[@jamiepineda82]

We’ve replaced both, disconnected the battery and it’s still happening! Check engine light is on and reading thermostat at auto zone! How do we get it to stop?

[@One.shot1]

I changed the fuse lol and it worked

[@ilikeyoutube3142]

May I ask which fuse did you change?

[@ambition0516]

I need to know the same thing @@ilikeyoutube3142

[@RK777PL]

I can't believe this happened looks like a new car I drive a Lexus GX I don't have to worry about none of those kind of problems. The reason I watch the video because I have a smoke problem with my mother-in-law's GMC Arcadia.

[@dannyjohnsonsgarage]

I agree. This Yukon has had a ton of problems. Im currently changing the cam and lifters- I bought a Toyota Tundra in the meantime for a more reliable truck

[@RK777PL]

@@dannyjohnsonsgarage we live in America we should buy American products but unfortunately the quality is going down the hill anytime I buy a car I look for one with the VIN number that starts with a j that means it was built in Japan I hate to say this but they have different work ethic there they take pride and what they do and that's a big difference in quality and manufacturing I don't need people get mad and upset that's just a fact I'm not saying they don't have problems ever but it's just way way less

[@stromytube]

Hi i disconected - cable 4 10min I just let run engine few min so water not get hot I shut off engine fan not runninng But sensor probably wrong anyway When you start engine all display clocks go up and back to normal ... water clock not even move ... I guess sensor is bad... I will take it off tommorow will try clean up or buy new one and i will keep posted... Thanx 4 video

[@dannyjohnsonsgarage]

The thermostat will tend to stick open, sometimes turning the car on and off may help it unstick. In the end I would look at a sensor and thermostat kzbin.info/www/bejne/bZ6td2iChpiihtUsi=6xfkmLSaXpKSGSHm

[@olivasaz]

I did change the ect sensor but it’s still running for a few minutes after traverse turns off. And there isn’t any check engine light .

[@dannyjohnsonsgarage]

@@olivasaz it’s most likely the thermostat is bad and stuck open, over-cooling the engine: Thermostat Replacement Yukon, Tahoe, Sierra, Silverado, Escalade GMC, Chevy 2014-2020 P0128 kzbin.info/www/bejne/l3bJmJ6ujMl1j9k

[@quincy6076]

Thanks for video Man U a life saver

[@adriancarry8771]

Can you answer my question… so I changed the sensor and battery and it still doing it the noise os there something else wrong with my 2018 yin xl???

[@dannyjohnsonsgarage]

Try the thermostat next. It can have the same symptoms kzbin.info/www/bejne/bZ6td2iChpiihtUsi=rCTBqC3aHX686Xoa

[@Leo-iv1mj]

Would that make your ac blow hot?

[@dannyjohnsonsgarage]

It’s possible it shuts down the ac compressor as part of its limp mode. Replace the thermostat if it’s showing 160 degrees (it’s really showing lower) kzbin.info/www/bejne/bZ6td2iChpiihtUsi=zXNMnz7MKtXA7IVO

[@ironheadhooligan]

I have a 2015 gmc Yukon xl Denali…I replaced mine about November and in February it did it again…replaced it again cuz the part has lifetime warranty at Autozone and almost a week later did it again….I’ve replaced the thermostat before as well the first time…may r a bad batch from Autozone?🤷🏽I’ll probably order an original from rockauto

[@dannyjohnsonsgarage]

I sued the GM one and so far so good www.amazon.com/ACDelco-213-4514-Professional-Coolant-Temperature/dp/B001W0FSMM?crid=2W7SZ4JL3KG18&keywords=213-4333coolant+temperature+sensor+gm+1260-8814&qid=1666942889&qu=eyJxc2MiOiIwLjc4IiwicXNhIjoiMC4wMCIsInFzcCI6IjAuMDAifQ%3D%3D&sprefix=213-4333coolant+temperature+sensor+gm+1260-8814,aps,121&sr=8-2&linkCode=sl1&tag=2004047-20&linkId=26bc817b596203fb2d3af79336fbb48a&language=en_US&ref_=as_li_ss_tl

[@cruzflores616]

Im not getting any check engine lights but it takes 5 minutes for fan shut off while truck off

[@dannyjohnsonsgarage]

Is the temperature gauge reading 0? It’s most likely the thermostat and or the temp sensor. kzbin.info/www/bejne/bZ6td2iChpiihtUsi=FLjYyzzHoF_WYXx3

[@cruzflores616]

@@dannyjohnsonsgarage thank u can I drive it like that for 2 days cuz I need my truck for work

[@cruzflores616]

@@dannyjohnsonsgarage yes

[@HK-el4xv]

Thank you

[@lauravargas6215]

Was her A/c working? I’m having the same problem but A/C not working.

[@dannyjohnsonsgarage]

It may turn ac off in the default mode. I would suggest the thermostat and temp sensor Thermostat & Coolant temperature sensor replacement: Yukon, Tahoe, Sierra, Silverado, Escalade GM kzbin.info/www/bejne/bZ6td2iChpiihtU

[@chrisasaurus]

My dads keeps doing this , replaces the sensor 3 times so probably something else going on

[@cruzflores616]

I had the same problem but in two days it went away should I still change the thermostat?

[@dannyjohnsonsgarage]

I would be prepared to do the thermostat and temp sensor kzbin.info/www/bejne/bZ6td2iChpiihtUsi=p4dg6Q80BsDM2nd2

[@CraigCotton-q3d]

My 2018 GMC Yukon is doing the same thing with the fan. After driving for more than 45 min it comes on and gradually gets louder. However, my temp gauge is always reading normal, there is no check engine light, im not running heat of ac, there were no codes found. What could it be? When I turn off the engine it stops and I have to let it sit for hours for to stop.

[@CraigCotton-q3d]

@dannyjohnsonsgarage

[@dannyjohnsonsgarage]

If the computer recognizes a temperature is not what it should be vs another temperature (for example the engine temp reads cold when the transmission is hot) it may trigger the fan. In your case everything looks good, but it could be some disagreement of temps. I would look into the thermostat and temp sensor. It could even read incorrect, then start working again so you think it’s fine. kzbin.info/www/bejne/bZ6td2iChpiihtUsi=PoQLChpViUR0YLbr

[@amyclaypoole3734]

What woukd make the sensor keeo going bad. I have a 2017 Suburban, and ive replaced the sensor twuce in the last 6 months. Gan will run loud and continue after i tuen off my vehicle and the temp gauge reads 160. Why do my sensors keep failing so frequently???? Help!

[@dannyjohnsonsgarage]

If it continues, it may not be the sensor, but the thermostat. kzbin.info/www/bejne/l3bJmJ6ujMl1j9ksi=kwK5TSbu3g0jUR4A

[@SteveGeer-y6t]

What's next if you replace this sensor and the fan continues to run?

[@dannyjohnsonsgarage]

Check for codes, but if it’s still over-cooling it could be the thermostat kzbin.info/www/bejne/l3bJmJ6ujMl1j9k

[@Pandapaperclipp]

Thank you!!!

[@dannyjohnsonsgarage]

I would look as both the thermostat and the temp sensor kzbin.info/www/bejne/bZ6td2iChpiihtUsi=koH-IPFQ_EtM7eFh

[@jeremynash6237]

I've replaced mine and it still does it it's a 2014 sierra and idk why it starts again happens when I run my heater. Wiring issue maybe??

[@dannyjohnsonsgarage]

It is a default mode when something is wrong. Does the temp gauge work properly or show zero (160*)?

[@jeremynash6237]

@@dannyjohnsonsgarage sometimes it works fine when I use my heat it tends to go out. Right now it's out and my fan kills my battery

[@dannyjohnsonsgarage]

@Jason Steele The relay for the fan is an electronic switch. If it stays on it could be the reason it doesn’t turn off

[@coreyfleming8328]

@Jason Steele Hey. Hsving the ssme issue. I just replaced the thermostat and temp sensor... fan still running and no temperature change on dash. Did you find anything additional?

[@coreyfleming8328]

@Jason Steele thank you very much for responding. That took care of it 😁

[@christinarodriguez2925]

SAME exact thing going on with my 2016 chevy suburban but we changed the sensor and it stopped doing it then again. What else can i do? Also the batter voltage will go below 14 and then 14 is that normal?

[@dannyjohnsonsgarage]

Battery voltage should be 13.5-14.5 for a good alternator. See if you get a check engine light. Some people have reported low engine temp because the thermostat was bad. It may be the next thing to look at kzbin.info/www/bejne/l3bJmJ6ujMl1j9k

[@MrLeonidas5222]

I replaced the voltage sensor in the negative cable, now is good the voltage, good luck

[@1badmafaka983]

So i replaced the sensor on mine and a couple months later its back on, it looks like i need to move on to thermostat which i think has never been changed. truck has over 100K miles.

[@dannyjohnsonsgarage]

It’s very possible. kzbin.info/www/bejne/l3bJmJ6ujMl1j9k

[@1badmafaka983]

@@dannyjohnsonsgarage So yea I, replaced the thermostat yesterday and issue went away, super easy install.

[@eldaestrada1582]

Had the same problem, now there is no power to the car. Please help

[@alecmajor9]

Try the battery. Check to see if you need a new one

[@donteeast1536]

My 2015 Chevrolet Tahoe is doing this now. The fan is running but my gauge is at 0. Now my check engine light is on.

[@dannyjohnsonsgarage]

Probably time for a new temp sensor kzbin.info/www/bejne/aqjHYaFve5tgY7M

[@dannyjohnsonsgarage]

If you think the thermostat is also stuck open making it over-cool you can change that too, but maybe try the sensor only first. Here is the thermostat and sensor, but you might not want to pay for the more expensive thermostat unless it’s bad for sure kzbin.info/www/bejne/bZ6td2iChpiihtU

[@donteeast1536]

@Danny Johnson’s Garage yes. I'm going to replace the the coolant temperature sensor first and if that's not the problem it's my coolant thermostat

[@donteeast1536]

@Danny Johnson’s Garage I replaced the engine coolant temperature sensor and so far everything is back to normal. Thank you very much for the video.

[@donteeast1536]

So I replaced the coolant engine sensor in my 2015 Tahoe 4 weeks ago. I thought everything was all good but now the same problem is happening.

[@GIANGNGUYEN-go8oy]

SOME HOW WE THINK IT'S NOT THE CAUSE OF THE TEMP SENSOR IT HAPPENED TO MY CAR TOO IT'S 2021 CHEVY BLAZER AFTER I FOLLOWED THE TIPS I REPLACED THE 3 YRS BATTERY AND WOW THE PROBLEM GONE NO MORE RADIATOR FAN RUN ON HIGH AND THE GAUGE BACK TO NORMAL TEMP.

[@dannyjohnsonsgarage]

The thermostat can also cause the fan to run if it is stuck open and over-cooling the engine kzbin.info/www/bejne/l3bJmJ6ujMl1j9ksi=ZGLk4TNu19cxP4X7

[@rolfdahle9982]

worked like a charm!

[@edgarpaloma636]

Dont even touch the sensor, just replace the thermostat.

[@dannyjohnsonsgarage]

I agree. It’s cheaper to try just the temp sensor but most cases I believe you are right and it’s the thermostat in the first place kzbin.info/www/bejne/l3bJmJ6ujMl1j9ksi=wGfq1wjrxll8IUpa

[@edgarpaloma636]

@@dannyjohnsonsgarage both parts are cheap, I replaced sensor first and still same problem. It was always the thermostat. Great video.

[@alanruiz4560]

2018 Silverado with same issue 105k mileage

[@dannyjohnsonsgarage]

I would suggest the temp sensor and the thermostat kzbin.info/www/bejne/bZ6td2iChpiihtUsi=7F_HT9M5NqOkpcVW

[@jonglazer9416]

UNPLUG NEGATIVE! Even after replacing sensor it still had an issue. Unplugging negative terminal for 5-10 mins solved it (as others here commented).

[@dannyjohnsonsgarage]

It will reset it but if the thermostat is stuck open it will come back

[@andreamassingill6132]

None of these worked 😢

[@dannyjohnsonsgarage]

It could be something else, but it’s usually the thermostat and or temp sensor kzbin.info/www/bejne/bZ6td2iChpiihtUsi=XJ-7IV4571T34iIF

[@fasdboom9209]

Did you remove negative side of battery? I just replaced both sensor and thermostat and turned vehicle on. Still was reading low temp and fans were still on after I turned vehicle off. Unplugged negative for 10 minutes and now working properly

[@domanick09]

Man wtf. My first Chevy just started this crap

[@dannyjohnsonsgarage]

Here is how to fix it if it’s the thermostat. kzbin.info/www/bejne/bZ6td2iChpiihtUsi=FLjYyzzHoF_WYXx3

[@dannyjohnsonsgarage]

Here is a playlist you may enjoy on all the repairs I’ve done on mine Yukon / Tahoe / Suburban / Escalade Owner’s manual Bells & whistles kzbin.info/aero/PLIjr-uSYDZi7J7EQ1ErTn1Yzi6ET_3Ssr

[@markjordan9357]

Here is the best no cost solution...unhook negative battery cable....leave unhooked for 10 minutes...hook back up...all fixed.😁😁😁😁

[@dannyjohnsonsgarage]

And when it comes back on again, do the thermostat and temp sensor kzbin.info/www/bejne/bZ6td2iChpiihtUsi=pSsYjHq0cDo6yB05

[@andreamassingill6132]

@@dannyjohnsonsgaragewhat if nothing worked I changed my sensor the thermostat the fan fuses I have only 3 relays in my fuse box and all work so idk what to do

[@dannyjohnsonsgarage]

@@andreamassingill6132 When the engine has been running for 10 minutes, does it show cold on the temp gauge?

[@asherdemme7957]

Think I'll just blow up my 2017 chevy colorado, you literally have to take the engine apart to change the sensor out.