Coolant Temp Sensor Replacement 1988-1995 GM Truck

How to replace a coolant temperature sensor on 1988-1995 GMC or Chevy pickups with the 305 or 350 TBI engines,

[@lessmart9301]

No Wrong. Temp sensor located near top hose on intake manifold. You just change temp sender for your gauge and by the way the single wire plug won't fit that sensor. Good Video

[@chuckchuckf.l.o.w4131]

We’re is it at on top

[@tedday2008]

@@chuckchuckf.l.o.w4131 350ci 5.7L beside thermostat of engine. Just to to the left of thermostat. Two wires

[@mercedesguy8520]

These GM trucks have two coolant temp sensors one on top and one on the side the one on the side works your gauge so if you are having temp gauge issues the one on the side is the one you want to investigate. Thermostat issues check the top one

[@adolfoperez4294]

@@mercedesguy8520 are they the same sensors tho?

[@nathanhiemstra8228]

@@mercedesguy8520 if the sensor on the side is for your temp gauge, what is the purpose for the one on the manifold? Just curious

[@randomthingsasmr4063]

Just changed mine out thanks for the video didn't have 13/16 used 21mm instead and worked fine for anyone else that doesn't have 13\16 👍

[@MrTmax74]

Thanks! I found out how to test the cluster gauge someone else’s video, but it was a 97 truck. Your video shows me that the sensor is in the exact same spot. 🤘

[@josephmccarthy4151]

This is for the temp gauge in the dash. The one that talks to ECM is on top of the engine by intake manifold.

[@kellyhofer667]

Thank you for this video. I’ve been scared to do this but you make it sound really easy. Looking forward to changing out my sensor now!

[@curtissheppard1996]

Great video man..exactly what I was looking for. Thank you.

[@klb1956]

The temp sensor is on the intake manifold and the temp switch is where you reference on the side of the block. Thanks for the video.

[@nedrakastor1134]

The side one is actually called a Temp Sending Unit! It says so one the parts box!!

[@williamblanks8500]

thank you I have been looking every where online and in the parts manuals, i broke mine while changing the head gaskets and forgot about it until i got it back together.. I have been looking for a temp sensor and finding the sensor on the intake manifold.. I just searched for the temp switch and found the right part..

[@shanehansen1756]

You have it backwards jackass stop trying to give out advice when you have no idea what the hell you're talking about

[@Comefindout2]

Holy fuck very helpful!!!!! Thank you. I will try it in the morning. This I hope will explain why temperature gauge ain't working.

[@grumpygardner3059]

Thanks for the heads up on the coolant dumping.

[@levijeans20]

cool man thanx for the info, you should do one on the oil pressure sensor replacement i haven't seen a video yet of one of those, thanx again.

[@taterbombnuke]

Yes this is a helpful video and there is a lot of confusion as to the two devices. even in the manuals and online info it is vague. But yes this is the one that sends to gauge! The other on by the thermostat is the one that can effect the cars idle and other things. Thanks for the video!

[@mr.hanger]

Was going so point that out myself, but you beat me to it. The wire often gets messed up when a flunky changes plugs

[@brianwilson4422]

Welp I see now why my temp gauge reads nothing. The wire fell off the sensor and melted to my exhaust manifold o_o. Now I need to figure out where to get a new one

[@deadcowroad2417]

JBFisheris correct. 5.7L Chev has a sensor and a sender. Google TS4019 and TS4052SB. One sends temp to the gauge on the dash. It's between the spark plugs and has a connector with a mail post and a mail blade. The other one is on the intake manifold and it talks to the ECU/ECM computer. The ODB1 code 15 is fixed by the intake manifold part.

[@Comefindout2]

Much help thank you!!!!!! Damn temp gauge always likes to be hot.

[@hectoe91770]

FYI Plz don't get confuse with the temperature gage sensor and the coolant temperature sensor the TGS is next to the thermostat and the TCS in most engines is on the side the TCS runs under 1 wire cable and the TGS runs with 2 wire cable Great video by the way.

[@dorianjepsen2179]

You have that backward. The CTS is on the top of the engine with 2 wires.

[@bjbuschman2]

and you don't know the difference between sendor and sensor

[@Arizona_Vineyard]

Sensor senses something is right or wrong goes to the computer. Sender sends information to the gauge

[@SFMCOLLECTIVE]

Thanks brother gotta do mine

[@davoid2006]

In agreement. thanks... - DTM

[@chimuriki]

Is there a part number? Good video, thanks for sharing!

[@DavidinTexas]

Thanks, like you said, VERY Little to NONE info out their

[@Jayyp66]

What kind of problems were u having with the old sensor?

[@rottnappleacres6517]

The plug end and cable that I got has two wires on it, does it need to be grounded? 86 suburban

[@worstnightmare9772]

How many coolant temperatures does it have I got a 94 Chevy suburban Silverado edition TBI I thought only one but someone told me too

[@derrymcintyre7176]

my water temp gauge is just a dummy light. How do i install a gauge with a needle and numbers? couldn't find vid on utube

[@ThesiKCOne661]

what problems did it give you??

[@robertsaab534]

hello i am having issue of were the with the same problem but i cant find out were the sensor connects to i see the one that connects between the 1st and the 3rd plug but were does the other end connetion go to? i am tracking the wiring and it has two wires coming out of the coolant sensor, were does the other end connect to and how do i connect them

[@ThomasEpps88]

he says coolant like stewie says koolwhip 😂

[@ThesiKCOne661]

could this cause the car to run for 15 min then shut off if the sensor is bad??

[@desert1cop]

If you drain some fluid into a clean pan you won't lose any coolant and can put it right back into the radiator.

[@buggies72]

I have an rv with a chevy 454 7.4 liter and I'm trying to find out if anyone knows anything about both coolant temperature sensors. The one on the right of the motor I believe tells the computer the temperature and the one on the left is for the gauge. The right one broke on me and I can't find anyone that knows enough about it to help. I need to replace it but don't know part number or temp rating or if it's an etc sensor as opposed to ntc sensor. Can anyone help? Thank you in advance.

[@poppagrouch4781]

Why did you change it ? How did you, or what made you decide it was bad ?

[@shawnsecrest6194]

This guy doesn't know what the hell he is talking about lol

[@biofall38]

Just in case you can't find your sending unit or as he calls it the sensor I found mine on the exact opposite side on the right rear side

[@chrisl2090]

Just changed the Temperature sending unit. My gauge was reading low. It's still reading low. I wonder if my grounding wire up by the Thermostat needs to be replaced because i also changed the thermostat recently and had to replace the grounding eyelet

[@JD-ll7px]

Did you ever find a fix for the low temp gauge I’m having the same problem

[@chrisl2090]

@@JD-ll7px yep found out I was given a 160 thermostat instead of 180 thermostat haha. Changed it out for the 180 and it's all good.

[@stephenmcfarland3078]

Dis that 160 thermostat cause you to have poor heat?

[@chrisl2090]

@@stephenmcfarland3078 during the winter months yes it does. The heater takes forever to warm up.

[@rugerbosss1022]

Tech talk with chad!

[@gastecconversionprofesiona4250]

thanks++

[@lowdenzacry]

The sensor is near the upper radiator hose I just replaced it today good vid but your gonna have to change it back

[@gordonabbe958]

I have a 1992 Chevy s10 blazer with 4.3,and problem I am having which I need the answer for is ! The truck is not over heating and most time I start it ,it goes immediately to hot when not over heating ! What could be the problem or which sensor is causing it to do that ? Thank You !

[@siberianstuntman3344]

Maybe the thermostat?

[@1wizzard]

I have the same exact setup on my 93 chevy caprice 305 tbi and when I plugged in the new sensor and connecter, the guage won't work now. It won't even move and I have new thermostat, water pump ect. I can't figure it out. I've reset the ECU and checked fuses. Everything's good I just don't know why my guage won't work. Help

[@joeschuett395]

1wizzard It’s probably your temp sensor which is located on the side of the motor by the intake right along the road with your spark plugs mine went out the other day I switched it and it would not show your temperature inside the cab thermostat will not read temp or move without that. the video is a cluster sensor

[@larryl43]

ty

[@jbfisher1]

Not your coolant temperature sensor. What you replaced is the temperature sending unit. On your engine the sensor is located at the intake manifold near the thermostat housing.

[@theonlyoddest5429]

jbfisher1 yeah u was about to say 😂

[@shanehansen1756]

No it isn't you dumb bastard you have no idea what you're talking about shut the fuck up

[@bryans8193]

Great video and thank you for it. Did you have to put any kind of thread sealant on the new part or did it come with the threads sealed? What part# is it and where did you purchase it?

[@siberianstuntman3344]

Use some teflon tape I'd the threads look like bare metal

[@bigal4304]

@@siberianstuntman3344 threads have pre applied sealant on them no need to add tapes

[@garywalker7641]

What was the problems you where having that made you think it was the sensor

[@riverhooligan8237]

87 as well buddy

[@_-Brandon-_]

Can someone here tell me where the wires from the sensor runs to..? I'm trying to rewire the sensor without having to install an aftermarket sensor and guage..

[@ramblinreelstv2335]

Just replaced the temp sending unit on my 90'. (The one on the driver side cylinder head) still no temp showing on gauge. Is there a chance that my gauge is just faulty?

[@jonathanfrausto3129]

Take the wire out, put a paper clip or something in the metal hole and touch it to bare metal, turn the key to aux and the temp gauge should shoot up, if it doesn’t you either have a bad gauge or a bad wire

[@jeffchristie9561]

Now, please demonstrate soaking the entire - warm but not hot - engine compartment with Simple Green, waiting 30 minutes, & rinsing it with 5-gallon pails-full of very hot water, keeping the ignition system dry ...

[@568843daw]

No dude, that is the gauge sending unit. The correct one is on the top of the intake manifold in the front.

[@shanehansen1756]

No it isn't jackass you have no idea what you're talking about

[@eyesonthefly]

have you had any problems with your blinkers? my left blinker wont turn of after i do my turn. how can i fix this? by the way i have a 95 GMC Sierra 1500 SLE Off Road Package Z71

[@chadt4]

My S10 actually has the same issue. Im pretty sure its an internal issue and it would require something in the steering column to be fixed. Hasn't bothered me enough to fix it.

[@eyesonthefly]

oh ok.

[@jamesbradford9854]

That's for guage not computer the one for comp is up by thermostat left side

[@annaschroeder5540]

Add a photo of the end of the plug an sensor. I bought 2 an still wrong plug in. So used a screw to stop coolant from coming out

[@bricemarchant9410]

Do you have the brand and part #???

[@vapor8189]

You say it was giving you problems. so im curious what were the symptoms? mine refuses to idle. 1994 GMC Sierra 1500 4X4 350 motor

[@chadt4]

The only problems my temp sensor was causing were misreadings on the temp gauge and a check gauges light

[@vapor8189]

Ah ok

[@KeithGreenshields]

Idle is the I.A.C (Chapter 6 of the Haynes Manual). E.M.C gathers information from all sensors and then proceeds to use the I.A.C (Idle Air Control) to operate the air fuel mix for idle. Best thing to do is plug in a O.B.D and retrieve codes (if service engine light is on). Quick way is go to used parts yard and ask for one and replace. About 6 bucks (In Canada). Good Luck!!

[@dorianjepsen2179]

Please fix the title/description of this video. A COOLANT TEMPERATURE SENSOR is *not* the same as a TEMPERATURE GAUGE SENDER. SENDERS are for gauges; SENSORS are for the ECM (computer). This video has nothing to do with the CTS. All you did was change out the unit that controls the temperature gauge reading in your dashboard. The CTS is on the top-front-center of the engine next to the thermostat.

[@bjbuschman2]

Finally someone with some common sense.If this guy claims to be a mechanic he should know the difference.

[@derrymcintyre7176]

Dorian... u seem to be the one to ask. i want to replace my water temp dummy light with a real gauge with a needle and numbers. how to? is it the sender right next to thermostat? And what to do with old wire? let it dangle?

[@bjbuschman2]

derry mcintyre Brian here if you don't mind.ok you can get a after market gauge and the sender unit is on either side of the block between the exaust manifold.I assume you got a chevy motor.

[@MrJdub20tx]

Thanks for making that clear!!

[@bjbuschman2]

I wonder if any of you people know that the coolant temperture sensor serves as 3 different functions.Can't wait to see if anybody knows this one.

[@tonipayne1660]

I have the same truck but it my blower for my heat .

[@mike-bj4dk]

DO NOT FORGET to burp the system after

[@shaneeconomu7282]

My engine surges at a low rpm I have replaced my thermostat and my temp gauge does anyone know what that is causing it

[@justiceforsome2634]

Iac valve, tps, vacuum issue, could be several things..

[@bannoch]

I think my temp sensors are faulty and when my truck gets warmed up it doesn’t idle well at all and only runs relatively good at high rpm, can’t really find any vids showing how the vehicle runs with the faulty sensors

[@ramblinreelstv2335]

Likely the sensor on the intake manifold next to the thermostat or your idle air control valve.

[@bannoch]

@@ramblinreelstv2335 it was the ignition control module, it got toasty

[@davidgaines6956]

I have a 95 I put new battery, alternator and used my warranty to get another alternator but something is draining my battery down like every 4 or 5 days I also changed batteries and got them checked, can anybody tell me what the problem may be?

[@justiceforsome2634]

Ignition, starter solenoid, bad switch for interior lights..could be several things

[@ramblinreelstv2335]

Any chance you have an aftermarket CD changer in it? That's what was wrong with my old truck 😅 unhooked that, no more voltage issues.

[@OVERDINNER]

Too bad you didn't show the connection type. My 93 work truck does not use the two pin type. One side of the harness has no hole for a second pin. Trying to find the right sensor. I'm talking about the sender on the side of the engine block, not on top by the manifold. Anyone have a GM part number?

[@bigal4304]

part number?

[@jhard8789]

That is not the coolant temp sensor. The coolant temp sensor is beside the thermostat housing on top of the intake.

[@rodneyalberta2020]

why dont you drain it then put it back in

[@johnunderwood9575]

This is not a temp sensor, it is the temp sending unit.

[@jamesgeorge1709]

Got news for you, that is the engine air temp sensor not the coolant , the coolant sensor is on or near the thermostat housing. 😬 Just saying.

[@Weaver2468]

That's a oil sender I just did mine coolant is on passenger lol

[@nickfoco7867]

Its the Temp sender 😂 i broke mine putting headers in.

[@elkompaveto]

Rust is eating that truck.

[@dragonslayer641024]

I was going to come here and post about the totally incorrect title of this video, but Dorian Jepsen(and a couple others!) beat me to it!! If people are going to post how-to videos on youtube, at least get your parts and facts straight!! You replaced the temperature switch(sending unit), not the sensor. They look almost identical, and this little bit of misleading information caused me no small amount of grief. Think before you post next time please

[@openphoto]

dude, you gotta either take this video down or explain that you're replacing the TEMP GAUGE SENDER and not the COOLANT SENSOR.

[@leehenry364]

my truck runs rough i think both of mine do not work ..

[@openphoto]

@@leehenry364 check your wires, distributor, timing, throttle body, vac leaks, electronic ignition module.

[@mjh123crh]

he also put the actual sensor 2 prong in his sender hole 1 prong.

[@clayturner4579]

@@mjh123crh does it matter if its 1 prong or 2?

[@mjh123crh]

@@clayturner4579 yes if you are replacing the temp sender unit and have an idiot light and a gauge you will install the 2 prong sender but if you only have a idiot light then you will install the 1 prong sender. Just look at the plug it will let you know which sender you need or pull the sender out and see how many prongs it has. If you are replacing the coolant temp sensor by the thermostat it will have 2 prongs always and looks almost like the temp sender and the plug will actually plug into the sender if you mix them up and put the sender into where the sensor belongs, I believe the threads are also different but the strong arm people will make it fit if you know what I mean but the plug for the sender will not plug into the sensor because the plug is a little larger for the sender unit. Hope I answered your question...

[@kiadams647]

Were gods green earth you from A

[@joeschuett395]

I thought I lost my mind for a second watching this video yeah that’s wrong by the manifold by your spark plugs

[@SpectrumVans]

Joe Schuett just found out. Thanks!

[@SeymourBalz]

That's the SENDER ! NOT the "Sensor"! Sender...sends signal to the temp gauge . "Sensor" sends signal to the ECM!

[@brian7189]

Seek Jesus! Repent for the Kingdom is at hand! Jesus is the way! The truth! And the life! He’s the ONLY way! Open the Bible, read and understand that we are in the last days! Put your full trust in him! Believe 1 Corinthians 15 1-4!

[@RETIREDAMATUER]

You replaced the wrong one pal