2014 GMC Sierra Cooling Fan Stays On All The Time

[@oklahomaokie]

Mine wouldn't shut off today for the first time ever. Shut truck off, pulled keys and it kept both fans running. Pulled both fuses, number 12 and 13. That made the fans stop but I put them back in and my fans started again. Truck was cool. Unhooked battery for roughly 30 minutes. Hooked battery up again and it works as should. Thanks for the video if it does this again I may have to swap some parts.

[@andregall6936]

Thank you. It was my thermostat after all. And now my gauge is back to reading normal and the A/C is back to working again. Feeling the difference of the heat in the top and bottom radiator hoses (coming out of the water pump) was what made me come to the conclusion it had to be the thermostat.

[@karirangel6409]

Glad to help!!!

[@reyesmorales100]

Same thing just happened to me this morning

[@Eddie-0102]

These things are happening to my car right now. My temp gauge wont go up my fans are always on and my ac wont work. Bout to replace the thermostat

[@jacobjennings9205]

Thats wild. So my AC stopped working in my 14 gmc a couple weeks ago and now my fans won’t turn off. Maybe changing my thermostat will get my AC back on too. 🤞🏽🤞🏽

[@joemontoya2370]

@@masdbo because it's a failsafe in the computer. Engine temp not rising could mean a bad temp sensor, so the computer can't determine the actual Engine temp (which could actually be really hot) so the fans turn on at 100% as a failsafe.

[@jdoggtexasmade5818]

This is happening now glad this video is posted. Thanks.

[@arthurhurtado66]

Well the same thing happened to me on my 14 Sierra with fan staying on, I went to my GMC dealer and bought the thermostat for $71. No more annoying fan, Thank you very much for making this helpful video!!

[@rtuck4171]

same

[@kevins5268]

Has it stayed working properly

[@ryanreese426]

Thanks amigo!! Same exact problem with my 2014 Silverado. You're right, not much on the web about this problem. Thanks again.

[@devenfusiler951]

This was great advise. I had the same fault with the same make and model. So far the problem was solved. Great job!!! Thanks!!

[@JoesColoradoxx]

Well here is the update, i have managed to change my temp sensor and had same problem. Changed the thermostat and after 3 days now i havent had those fans turn on any more. The sensor was $20 and thermostat $50 locally. Not bad and i did all the work. Too easy and im glad its working now. 👌

[@Nick-fy7yi]

Hi there my Volkswagen Golf fan spins when the car is running at all times and when the car is off I pulled the fuse regularly at night to prevent the battery from draining. Now I pull the fuse and the fan is still spinning !! Any suggestions

[@zavengrigoryan7784]

Hey brotha I got the same issue on my SIERRA so thermostat and the sensor is th same thing right ?

[@davidacosta4765]

Mine did the same thing fan stayed on while turned off and key out ! I had the same code but I replaced the thermostat sensor right next to the thermostat and that did the job quick and easy 5 min fix !! Was glad ! And also cheap in price

[@cooter1227]

One thing nobody tells you is that even after you replace the parts you have to reset the codes for the problem to stop.

[@redsoundaudio6323]

Or unplug the battery for a few mins lol

[@jel386]

Or just drive it and let it go through it’s self checks and reset itself

[@dustym.111]

I've noticed that for the last couple weeks that both my electric fans have been stuck at running high when engine is running on my 5.3L 09' gmc sierra 1500. Coolant level is fine & yet to have over heated. Not sure what's up with the fans running high

[@stillakira3397]

So I have a check engine light on what would be the first thing I’d look at or try doing ?

[@karirangel6409]

If you go to an Autoparts like Oriellis Autozone or Napa they can help you see what codes you have The code p0128 is the one that makes the fan stay on This would be because the thermostat is open or opens too soon making the coolant not cross 165 degrees of temperature If you find this code, replace the thermostat. OR You can disconnect the battery for 15 minutes and then hold the brake pedal for one minute This will erase the memory of the car’s computer and you’ll see the fan not on anymore until the computer picks up the code again If the fan is not on after you reconnect the battery, replace that thermostat I’m assuming that your fan is on and the check engine light is on also.

[@stillakira3397]

@@karirangel6409 Thank you! I’ll have this fixed by the end of today.

[@ClutchCityDynasty]

I have a Chevy 2015 traverse same issue I’ve looked up a video it’s saying chance engine coolant sensor though... 😕 I’m confused

[@karirangel6409]

Hi. The first thing that we need so I can help you right is to know if you have the code p0128 in the memory is your car’s computer Is you do, change the thermostat and then erase the codes and try Or you can tell me what codes you have and all answer you back

[@khalidkhader2200]

I have this problem and after i changed the Thermostat it’s gone for 2 days, the 3rd day it came back again and now the fan stays on again like before! :( what could be the problem u think please??

[@hwilliams6217]

Same with me I changed sensor and thermostat and I am still getting the fan. I was told to change my ambient temp sensor and that should do it. Will keep you updated.

[@sjlyfe4085]

@@hwilliams6217 did you guys get it fix I’m having the same issue with mines came back on

[@hwilliams6217]

@@sjlyfe4085 what’s going on? I changed my thermostat and the sensor that’s beside it. My fan was still going after that. I read somewhere to reset my computer. So I removed the negative side of the battery. Turn the key onto the on position and tapped the terminal on the post three to four times and you will hear a click. Once I heard the click I hooked the battery up and started the truck. I haven’t had a problem since. Let me know if this helped. Good luck

[@sjlyfe4085]

@@hwilliams6217 Thanks I will check that out today.

[@throttlerdm934]

Saved me sometime and frustration watching this video. Orileys sold me that same thermostat. Looks like I’ll b returning and going to the dealer.

[@matthewpryor571]

I am having this issue right now. I searched and found your video. Thank you for taking the time to make the video, using red tape to mark the housing, the temp gauge on the dash, way cool ideas and I sincerely appreciate you sharing your knowledge. You are a good teacher. Have a great New Year my friend.

[@elguerrillerodefreefire5848]

I have the same problem now? So you fixed by following this video or you did some different?

[@Miwiz1]

Im having this problem now. Thanks for the video.

[@davidu8688]

I'm trying to figure this thing out. My fans running immediately upon cranking and after shutting off killing my battery. Temp gauge reading flat/nothing and my a/c stopped working. The a/c hasn't ever worked since it stopped but the fans do this off and on along with temp gauge. Changed out the thermostat and it's still doing it. It seems like the problem is getting worse. 😕 Any suggestions? I heard something talk about a sensor, guess that's my next step. 🤔

[@Nick-fy7yi]

How you fix it

[@TIMZ71]

Appreciate the vid and you posting help for others. God Bless you sir!

[@baileyhodges2584]

I have a 2016 Silverado Ltz and the radiator fan stays on the entire time the truck is running. When I turn the truck off the fans go off. Also the ac don’t get cold until 10-30 minutes. Then is blows super cold all day. I changed the coolant temp sensor and disconnected the battery for 10 minutes and it still doing the same thing. I’m not getting any codes and my gauge on the inside is reading correctly. Any ideas?

[@estebansanchez7689]

Hi i have a 2014 silverado lt 5.3L and did the same thing no temperature it was down to 160 and fans were at full blast but no check engine, could it be the dame thing do a habe to change the thermosta? Pls help

[@karirangel6409]

Hi!! If the temperature is not able to reach more than 165, the fans will stay on The thermostat is open and you do have to replace it The code is just taking longer to be registered but the light will turn on eventually

[@estebansanchez7689]

Ok im going to change the thermostat hope that will fix the problem thankyou for the video like your channel

[@estebansanchez7689]

Thanks i already change the thermostat today and its working great and the temp gage is working good its staying in the middle in the 210 degrees. Hope its salved and ready to go. Thankyou for your help

[@karirangel6409]

I’m glad it worked for you😊

[@estebansanchez7689]

Yes thankyou for everything hope you do more videos and hope i dont have this problem again

[@wallyhvaclifeg2501]

I unplugged the temperature sensor and the fans came on but compressor shut off when I reply temperature sensor fan turn off and compressor ran any thought in advance

[@throttlerdm934]

This has been happening to me for about 2 months now, but it comes and goes more during colder days. The first thing I notice is that the AC stopped blowing cold then the fans and after a while the check engine light it might last a day or so then I noticed my temperature gauge start working again my AC starts blowing cold but my check engine light is still on for maybe one or two days. Then back to normal usually until it’s a cold morning

[@karirangel6409]

Hi, it sounds like you live in a climate where the mornings could be cold, if your coolant is just above 165 degrees after one minute of star up When you have a colder morning, that number may drop under 165 with the help of a bit colder morning The computer wants to see 165 or more (200 average) to call it good and allow systems to operate normal It does sound like you’d thermostat is no good If you want, or can, have the codes read at your local auto parts (it’s free) and tell me what codes you have A code reader is cheap, I think every person with a car should own one. I just bought one on eBay for 13 dollars But just go and get the codes read and I can help you further after that

[@throttlerdm934]

I have a code reader it reads the same code po128

[@karirangel6409]

@@throttlerdm934 that’s the thermostat. Change it and erase the code. If you erase the code before the repair. The Symptoms will go away because the code it’s what makes all the symptoms But the bad thermostat is creating the code p0128

[@TheHlucio]

My GMC truck is doing the same thing. My? so does that mean my truck might be overheating since the temp gauge is at the lowest?

[@a1fixitguy309]

What size engine?

[@hectorramirez8779]

Hello....I have the same issue but no check engine light to check for code. Would it still be the same problem?

[@karirangel6409]

Hi! I had one more person contact me with the same Scenario as you. And it was the same thing I would say it is the same thing

[@juanmercado1016]

Do you know where cooling fan relay is located in this truck?

[@karirangel6409]

Hi, under the hood, drives side kind of on top of the drivers front tire you’ll find a fuse box If you have a label/diagram of the fuse/relay box, you’ll find “fan control relay” “fan low” “fan hi” or you can also find “FAN MID 1” and “FAN MID 2” I hope this helps you

[@throttlerdm934]

Also I have a question. Al ng with these other signs( fan constantly on, code, temp gauge not marking ) did u notice that the ac would stop blowing cold air???

[@karirangel6409]

I didn’t see that myself

[@SanMario95]

i noticed this. and i know my ac wasn't messed up because i replaced it last year. i also knew it wasn't the fuse because i disconnected the battery and reconnected the battery and the truck would act normal for a day and then go back to having the fans on. i'll try changing the thermostat when i have the money next

[@andrewwilkinson5220]

This happened to me today, and when I cleared the code, the problem went away. I don’t understand how the thermostat has anything to do with this. The thermostat is simply a mechanical piece that regulates flow based on temperature. Although if it were stuck open or closed, your temperature would be off spec, but it can’t possibly send a signal to the ecu. So my question remains, what caused the code to appear in the first place, and why does clearing the code fix the problem? My situation was remedied by simply clearing the code

[@karirangel6409]

Hi, The coolant temperature needs to go over 165 degrees with in an “x” amount of time (Varies from car to car) If the thermostat is faulty, not doing it’s job to regulate temperature and reach over that 165 degrees ( 200 degrees average) then the computer will store a code for the temperature not crossing 165, and thats what triggers the fan to came on Why does it come on? You would have to really ask the engineers that made the system, because this was not happening before in other vehicles This is a new symptom in car diagnostics There’s a chance that the code will store again in your truck and the fan will stay on again Good luck

[@kevins5268]

Did it come back later?

[@chrisbarela1249]

I have same problem I changed thermostat and sensor can still coming on please help

[@osvaldosanchez8563]

You are a lifesaver I appreciate you!!

[@carlosflores8456]

Is it bad if u leave the problem for to long like a week ?

[@willie2510]

I change my thermostat last winter it shouldn’t go bad already but my fan is constantly running for 3 min and killed my battery. Is it the sensor?

[@karirangel6409]

If you have a check engine light on, I can help you faster if you get me the code The p0128 would mean that the coolant is not crossing 165 degrees and that would be because the thermostat is opening too soon Or Disconnect the battery for 15 min. Before connecting the battery back on, press and hold the brake pedal down After this connect the battery back on (you just erased the computers memory) if the fans are off. Change the thermostat

[@karirangel6409]

Sorry. “Press and hold the brake pedal down” for 60 second, yes, one minute 😊. I forgot to tell u the amount of time of pressing

[@willie2510]

Ok no engine light. This happen 3 weeks ago for one day. Started back today n drained my battery. I was going to change sensor. I’m try this first. No the gauge doesn’t pass 160

[@karirangel6409]

@@willie2510 ok. Try this. It should solve your issue

[@willie2510]

@@karirangel6409I did it hasn’t happen yet. But if do it’s my thermostat? Also thanks

[@joaquingarcia1122]

I’m goin threw this issue right now Wher can I get the thermostat

[@karirangel6409]

Napa or Oriellys or Autozone.

[@joaquingarcia1122]

Did you also repair the sensor Coolant temperature sensor

[@karirangel6409]

@@joaquingarcia1122 no, I didn’t. Just the thermostat and reset

[@nickbraxton4486]

Thank you for this, I'm going through it right now

[@abrahamfelix9298]

I just changed my temp censor 3 times already I’m about to try this

[@cjroberts7022]

i replaced the thermostat, but it was actually sensor on the thermostat.

[@RapidsealSL]

OK what was the problem was at the thermostat or was it the fan module?

[@karirangel6409]

The code in the memory of the pcm, makes the fan stay on. When you reset the memory the fan stops being on, So replace the thermostat and reset the codes

[@ironheadhooligan]

I have a 2015 yukon xl denali 6.2.....fan always on even after turning the vehicle off ..it ran for like 5 min...temp gauge not reading and ac wouldn't blow cold air..first I replaced the ect sensor and it didn't help..took to AutoZone to get the codes cuz of the check engine light on....they gave me a printed report with all the fault codes and a recommendation to replace thermostat....they had what I needed...I replaced it...and problem solved....I did keep the ect sensor cuz it's better to have them both replaced at the same time..since they work in conjunction ...my xl has about 157 thousand miles...I got it with 115 thousand..and I had never replaced either...hope that helps anyone!🙏🏼💪🏼🐷💯

[@jrcathey9289]

Thanks just happened to my truck this morning, thought it was the temp sensor.

[@karirangel6409]

Happy to be of service 😊

[@Canibal_Animal]

It probably wasn't the thermostat. It was you clearing the codes. Ive fixed this problem several times on GMC and Chevy trucks. What happens is somebody replaces the pass side headlight and unplugs the MAF sensor to remove the air box and gain access. This can and usually does throw a code and create this condition. Especially if they leave the clamp loose on accident. A simple check and code clear will resolve the problem.

[@karirangel6409]

Hi! I have erased the code on cases of p0128 and the fans turn off, the car will return with the restored code p0128, That’s why the thermostat gets to be replaced Yes you can also trigger other codes that can make the fan be on

[@BlackPrint27]

thank you this was helpful however the dealerships around here did not sell the thermostat by it self they only offered it with water pump , but amazon came throw lol

[@karirangel6409]

I hope the one from amazon did fit, some part warehouses have the application on a gm thermostat but it’s wrong Hoping that all went well for you.

[@darkbeer9928]

Awesome Video... I also run Snap On Diag. Equipment in my small shop. I love your shelving in the shop...thats pretty cool.

[@karirangel6409]

Hi!! Thank you for the shelving comment. I made them myself😊

[@blakemclain5980]

What’s the best temperature rating for the thermostat for the GMC Canyon?

[@BEARDED_VATO]

I noticed this today, temp stuck at 160, fans running while running and a few minutes after turned off, but also ac not cooling 😑i already had the damn condenser about 2 years ago😡

[@tonistarks2874]

Good stuff brother👍🏽had the same prob and erased the codes and fan problem is gone..if it does return then thermostat it is😁mine was on a 2014 Silverado

[@DSNCB919]

Wait what did you rep,lace?

[@karirangel6409]

Sorry. I had not seen this. The thermostat!! And reset the codes

[@derekhernandez4572]

I have this exact problem i cant go to a mechanic right now. So how long can my truck stay off like this with the fan going

[@jayh5870]

Crazy i just got the same thing

[@karirangel6409]

Well, the battery may go bad if your fan is always on. Disconnect the battery for 15 seconds while you hold the brake pedal down. This will erase the code and make your fan be off until the computer registers the code again. When the code returns and the fan stays on again, just do this step until you can change that thermostat

[@unclecooper6593]

What year is this truck and what type of engine does this truck have

[@Man_in_a_Gucci_Suit]

2014 Sierra It’s in the title….. Engine is probably 5.3L V8

[@simaellopez3602]

Do you have to drain the coolant while changing the thermostat?

[@DrainDeSwamp]

Ty for the help 👍 paid 13. 99 on eBay for the thermostat

[@blackjesus159]

Your the man. This saved my butt

[@austing697]

Same thing happend to me after I got it tuned and I just unplugged battery and plugged er back in and it's fine now😁😁

[@H111-y8f]

This issue causes to brake my vette head gasket and mixed oil/water and cracks the two heads, LT1/4 and L83/86 same concept whenever thermostate stuck the temp gauge will acts weird and fan will continuously keep working not because bad thermostat but because the engine overheated and you cannot tell because temp gauge works incorrect. I learned if i switch to 160 degree thermostat i buy the one with LS housing which prevents this issue happening. Otherwise stick with the OEM one

[@danielvelasquez6444]

So was your check engine light on or did you just use a code reader and got a code with no check engine light?

[@karirangel6409]

Hi, I did have a check engine light on. And I did have a code But, some people have said that they have no check engine light on and after doing a code erase the fans turn off Some times the codes are “hard” codes and others are “soft” The soft code may not turn the light on, but will make the fan stay on Check on “Freeze frame” on a scanner. The code p0128 may be store there and that’ll make the fan stay on

[@danielvelasquez6444]

@@karirangel6409 ok well thank you. I will try that first and let you know if it worked

[@Lowdowndirtybassin1978]

My fan used to stay on now it doesn’t turn on any the fluid over flows out of the reservoir

[@karirangel6409]

Let’s hope that there’s no overheating damage to the heads, gaskets, or engine Electrical or the fan motor itself First thing is to make that fan operate, Check fuses relays and wiring The diagnosing could be difficult. If you want my help, you can Facebook contact me. I can call you or you can call me Oscar Rangel is my account

[@Lowdowndirtybassin1978]

@@karirangel6409 There is lots of Oscar Rangel’s my Name is Ryan Guerra is there a profile picture im looking for ?

[@karirangel6409]

facebook.com/profile.php?id=100008536024393

[@karirangel6409]

I just posted a link

[@JoseSanchez-tn2ii]

You are the man!

[@frankkeiser1434]

Thank you so much, i have the same problem this help's alot

[@karirangel6409]

Frank Keiser I’m glad It was helpful😄

[@TorikHardware]

Thank you for this, it helped out.

[@uricast91]

Part numbers?

[@karirangel6409]

Hi, the part number for this specific vehicle (14 Sierra 5.3L) is 12674639 And that’s the original one from GM ORIELLYS PART NUMBER MCS 81507 NAPA THM HT207518 AUTOZONE 81507 Thanks for watching

[@JoesColoradoxx]

I have a 15 suburban, i did changed the thermostat which was only 20 dollars on Oreillys. Same problem after 2 days. Now i ordered the thermostat ($60.00 and its already installed) i have not checked it due to raining. But hopefully in the next few days it will fix the issue. P.S yes the ac will not work when fans are on i guess its a safety feature thinking the temp is hot.

[@karirangel6409]

Hi, did you have the code p0128?

[@JoesColoradoxx]

@@karirangel6409 yes and this guy who i know reset it on his electronic device but still had the issue. Again i had already changed the temp sensor so i went to purchase now the thermostat. I will post with solution hopefully.

[@karirangel6409]

Ok. If it had the code. It should work Disconnect the battery overnight. To make sure the memory of the code is erased Sometimes the Gadgets to erase codes fail

[@JoesColoradoxx]

@@karirangel6409 yes i did that earlier when i was changing the thermostat. I did start the truck on and off twice and no fans. Hopefully this time it will work and no fans start up again. 👍

[@Packs602]

So I Jst noticed mines stays on for exactly 2/4 minutes after I turn it off is that normal !??

[@karirangel6409]

Hi, it doesn’t sound normal. If you have no codes or check engine light on, you may need a reprogram to your bcm or pcm I’ll investigate your issue a bit and may message you again

[@JRMEJIA3NT]

@@karirangel6409 I also don’t have a check engine light on. How would I reprogram the bcm?

[@karirangel6409]

@@JRMEJIA3NT A reprogram is different that erasing the codes, if you need a reprogram, the dealer or a well knowledgeable tech can reprogram using a special scanner

[@georgeskinarakais9910]

Thanks bro that’s what I thought too but your video help me confirm it

[@davidmcalister6806]

Thank You very much that is exactly what the problem was.

[@elwilly5592]

can i drive my truck still ?

[@karirangel6409]

Yes you can. You coolant level should be one thing to check. If you are ok on your coolant level, yes you can use the vehicle

[@elwilly5592]

@@karirangel6409 the level drops and fan turns on can i still drive it to my gm dealership? its about 30 mins away

[@karirangel6409]

Turn your heater on, if the heat works you can go to the dealership. If the heater stops working while driving to the dealer, you may not drive anymore. Hot heater while drinking means that your coolant is full

[@flpmacias]

Thank you very much my friend you help me very much God bless you

[@karirangel6409]

Thank you!!

[@bigdogtheartist1811]

Hey man! I really appreciated, that exactly the problem that I have with my 2015 Silverado 1500. Thanks for info.

[@anthonymanila2921]

Thank you so much! Great explaining also thank you thank you

[@karirangel6409]

Happy to help!!😊

[@susankarma173]

Fixed the same issue by disconnecting the battery waiting 15 min reconnected EVERYTHING WORKS I kid you not!

[@gskelton2937]

THak you so much...Hey could you show us how to install it?

[@robertorozco3204]

Thanks for the info

[@royevans9904]

My Silverado did it to me about 8 months ago and quit the next day now it’s doing it again..Gonna try the battery first then censor

[@honchoponcho1828]

On gang we all got the same Problem

[@robertolopezjr9798]

Thanks I'm have the same problem with my customers truck turned out to be the same thing

[@karirangel6409]

Glad to have helped!!

[@omex1234]

My truck just did that but my ac was blowing hot also

[@karirangel6409]

omar hernandez Hi! After you erase your code. Your ac may start blowing cold again

[@abelramos169]

@@karirangel6409 how do you erase the code ??? HELP!!!! :(

[@abelramos169]

@@karirangel6409 and... did you drain the coolant ?

[@karirangel6409]

Hi, Omar is right, so, if you don’t have a scanner to erase the codes, disconnect the negative of the battery and then go to and press the brake pedal down for at about 30 seconds. Let go of the brake pedal and reconnect the negative and start the engine. If the check engine light is still on, then go to an auto parts and they will lend you a scanner or they can help you use it. So this so you don’t pay an auto repair shop to do so No you don’t have to drain the coolant, there will be a bit that spills out when you remove the thermostat. Have some coolant ready to top off. Another advice, after you are done with the job. Let the vehicle reach normal operating temperature, the. Let it cool down completely and recheck your coolant level. It may be low after it gets cool down

[@abelramos169]

@@karirangel6409 THANK YOU SO MUCH!!! I'll follow you for next things come out with my truck. 👏🏻👏🏻👏🏻

[@jos.beire.6005]

If the neede doent move the senzor is bad you dont need to be mechanic to know that lol

[@juanvenegas4450]

Thanks the best video i faun

[@IvethandJq]

Thanks

[@bounmyphanomphone2398]

thank you same my trcuk happen 555

[@Joebong1]

My dad just unpluged the battery

[@toddstephens3506]

Unplug the battery and it fixed it?

[@brunorosales7387]

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