1996 C/1500 Chevy temp guage doesn't work

I replace sending unit,,nothing,I ask mecanic and he told me is the oder sensor.
I can not find,
And mecanics He will not show me where is the location of secend sensor
Please Help...do not have $120.00 for repair.:banghead:

I replace sending unit,,nothing,I ask mecanic and he told me is the oder sensor.
I can not find,
And mecanics He will not show me where is the location of secend sensor
Please Help...do not have $120.00 for repair.:banghead:

Did you replace the temp. sensor on top of the intake manifold? The one to the left of the thermostat housing if you are standing in front of the truck.

The sensor that your gauge gets the signal from is on the left (drivers) bank, between and just below #2 and #4 spark plugs. One way to check to see if the gauge is good is, with the key on (engine off) unplug the wire and touch it to a bare spot on the cyl. block. If the gauge moves it is good. You will need some help, have a friend watch the gauge as you do this. Hope this helps.
BTW the sending unit (located in the intake manifold) controls the ecm.

Do as they say ^^^^ and also pull your thermostat housing to make sure you have a thermostat in there.

I Did replace the temp. sensor on top of the intake manifold.And I chek the voltage with key on.Is around 5,6...
I still do not see the other one...I have 4.3 vorteck engine.
I will chek agein to make sure i did not miss somthing..

I found one obove sparplugs 2 and 4. one cable is on the sensor.

I Did replace the temp. sensor on top of the intake manifold...

The sensor in the intake is for the PCM not the gauge. The sensor for the gauge is in one of the cylinder heads. On my 90 it is drivers side between #1 and #3 cylinders. I am not sure about which side it is on the 96 but it will be obvious.

//2000CAYukon

I found one obove sparplugs 2 and 4. one cable is on the sensor.

That's the one, I'd try doing as Horse482 suggested.

The gauge is not moving i replace both 1 and 2 ,let the engine runing for 20 minute and nothing..
I try touch it to a bare spot on the cyl. block nothing ....

any idea what i can do next...

Make sure the spot you touched it to is a good ground. I don't know where you are, but here in Iowa you'd have to spend 5 minutes with a grinding wheel to get a good ground through all the rust.

If it is a good ground, ground the wire as close to the guage as you can get. If it still doesn't move, the guage is most likely bad.

Nothing gauge not moving at all.

I did not mention that when gauge stop working the Heat in the cabin stop to..
I have heat ,the only problem is i need to drive 20 to 30 mile before start to heat.
Is that some how conected or it is Just me.

Well now, that makes it sound like a bad thermostat. Check the ECT with a scan tool. If it is less than the minumum reading on the guage, the guage is probably good and you just need to replace the thermostat.

I fixed it is working...
spend $60.00 and learn some things abouth my Truck....
Th All for Help...
:icon16: :icon16:
TH ,TH, ALL

I have problem agein..

When i drive my engine is loosin power..AND HARD TO START
And when I disconected the Sensor drivers side between #1 and #3 cylinders
ENGINE WORKS,
then My temperature gauge is not working.
I chek with mechanik he sey is''' mass folow sensor.$350.00''' then i went back to him to see progres of my car he sey i need to replace Sensor and Radiator..$700.00
I do not know what to do..We are talking in Thousend ...
He is showing me on the radiator one hose is Hot and the one on bothom of radiator is Cold....

Last week I change both ECT sensor and the thermostat..

I have problem agein..

When i drive my engine is loosin power..AND HARD TO START
And when I disconected the Sensor drivers side between #1 and #3 cylinders
ENGINE WORKS,
then My temperature gauge is not working.
I chek with mechanik he sey is''' mass folow sensor.$350.00''' then i went back to him to see progres of my car he sey i need to replace Sensor and Radiator..$700.00
I do not know what to do..We are talking in Thousend ...
He is showing me on the radiator one hose is Hot and the one on bothom of radiator is Cold....

Last week I change both ECT sensor and the thermostat..

What you are saying should not be. The sensor for the guage should only go to the guage, therefore should not affect how the engine runs.

To confirm if the MAF sensor is bad, unplug it and drive. If it drives mostly like normal, the MAF sensor is most likely bad. When the computer sees NO signal from the MAF, it uses RPM and IAT to figure about how much air is coming in. If it sees a bad signal, it goes by that signal. Your check engine light will come on for this test.

You may wish to re-evaluate your choice of mechanic. The lower hose on the radiator SHOULD be cold. Either he is trying to pull something, or lacks this basic knowledge. Either way, it may be time to look for a new shop.

You are corect for the radiator i Ask new mecanic ,and for MAF Sensor i Unplaged and work the same...idle is going up and down same with MAF sensor conected.

Ok..The Post i posted Before was diagnostic for my Truck..
I deciade not to repair Car "repair Cost to Much""Take Car From Mechanic and whent to Mechanic down the Stret to chek Car agein...He Find the problem And Cost is $50.00.
The problem is I chek my stetmant from Bank and The First Mechanic charge me $300.00 ..for Somthing i did not recive and That is ;;;;Work on My Truck,,,
Whent Back to car mechanic #1 and Ask him whata FFF ,,The Answer i got is I FIX YOUR CAR<AND THAT Is ALL...
Sorry my English is not Perfect.
I think he took my money for nothing,,,Is there somthing i can do...
Any info Will help....