How does the temp gauge on a Silverado work?

The temp. gauge fluctuates constantly between normal and 210^ in cool weather (40^ & below). Also during accleration it will rise to 210^ and drop back down, never staying at a constant temp. It constantly moves between normal and 210^, exempt during summer time it stays steady. I replaced the t-stat 3 times, having no affect.

How to troubleshoot a temperature gauge in a car?

Temperature gauge troubleshooting begins with isolating the problem either to the gauge, sending unit, fuse or wiring. As with any electrical troubleshooting it is best to check all wiring connections are clean, tight and free of corrosion. The following process must be preformed with the ignition key turned to the “on” position.

What should the temp of the coolant sensor be?

Check that the temperature value of the CTS is around 80-90c when the engine is hot. A lot of engine coolant temperature sensors have two wires and the sensor is controlled by Ohm. Get a wiring diagram and find out what ohms you should have at a specific temperature to check the function.

What’s the temp on a 1999 Chevy Silverado?

I’ve got a “99” model Silverado with 5.3, 3.73 gears, pushbutton 4WD in it and just over 200K miles. Up until last 6 months it never got above 210 deg. I had water pump start leaking a bit at weep hole and replaced it along with thermostat and flush for radiator, heater core and block.

What’s the temp on a GMC Silverado 350 TBI?

I have a 1995 GMC K1500 Z71 350 TBI. The temp. gauge fluctuates constantly between normal and 210^ in cool weather (40^ & below). Also during accleration it will rise to 210^ and drop back down, never staying at a constant temp.

Why does my car’s temperature gauge keep fluctuating?

The radiator could be plugged, could have plugged cooling passageways, could have a defective water pump, loose belt issue, collapsed hose, excessive load on the engine due to dragging brakes, underinflated tires, and so forth.

What should the coolant temp be on my Chevy?

I though the thermostat might be broken, so I replaced it with a 180 (was a 195). Problem continues except now it goes from 180 swings up to 210, then back below 180, then to 180 and repeates this all the time regardless of how long I drive. Anyone have any other ideas?

Why does the temperature gauge on my car read Cold?

If the temperature gauge still reads cold after the engine has warmed up, the gauge may simply be broken. Another reason the temperature gauge could read cold is if the thermostat in the vehicle stays open.

Why does my temp gauge keep going up and down?

If all instruments are acting up, that would be the culprit. If only one is acting up, it is most likely the sensor or the wiring for that one circuit. When it is coolant temperature, I think air bubbles can cause some fluctuating readings.

What does it mean when your car temperature is high?

Reasons the Temperature Gauge Reads High. If the temperature gauge reads high, it could mean your engine is overheating. Another reason your reading might be high is you could be losing coolant. A small leak or evaporation may cause your radiator to slowly lose coolant.

What should the temp be on my GMC Truck?

After getting it back from having leaking intake gasket replaced, the temp would go up to 260 before it went back to 170 and then would sit for a little bit, go back to 210, back to 170, back to 245 or so, then back to 170, but It never seemed to run hot. I changed the thermostat with a brand new 190* from NAPA and it seemed to cure a little of it.

What causes an engine temperature gauge to stay on cold?

Reasons Why your Engine Temperature Gauge Stays on Cold 1. Faulty Engine Coolant Temperature Sensor 2. Faulty Gauge/Cluster 3. Broken wires to the sensor or to the gauge 4. Bad Thermostat 5. Corrosion in connectors 6. Air in the coolant system 7. Broken engine control unit

What happens when the tow haul temp goes down?

Once I get down the road a few miles the tranny temp gauge drops to zero and the tow haul light goes on and off. Sometimes the tranny temp goes up and the light stops blinking but only for a few seconds. The truck doesn’t seem to drive any differently once all this happens.

Where is the Trans temp sender on a Ford PowerStroke?

The trans temp sender is towards the front of the valve body. It’s a little 2 wire sensor. You just turn it to the left and pull it out. I just did one the other day and the sensor is only like 15 bucks. Just started having the same problem today except my temp goes way hot and the tow/haul light flashes.

What is the temp on a 1995 GMC k1500 Z71?

What kind of temp does a GMC Sierra have?

My stupid ’96 GMC Sierra did this all the time. Driving down the freeway, constant speed, the temp would constantly fluctuate about 50-60 degrees. After a few days I figured it was normal, after a year and half I never had a problem with that.

What should I do if my coolant temp keeps fluctuating?

It’s pretty common for the temp to fluctuate this much, certain locations for the temp sender are more sensitive than others. If you are worried about air trapped in the block, drill a couple 1/8 inch holes in the perimeter of the thermostat flange. This will drain any air pockets in the block within a week or so.

Why does my Chevy coolant keep going up and down?

Unfortunately just driving won’t eliminate the problem. when the cap is on it creates pressure and if there are air bubbles in the system, it will prevent it getting rid of the bubbles. The sender being in a different location is probably why you are seeing this fluctuation.