Q: 1994 k1500 5.7l replaced 195 deg thermostat then a month later temp guage rises to 210 degrees at stop light then goes back down a

asked by on

flush & filled radiator and replaced 195 degree thermostat about 700 miles ago and now temp gauge rises to 210 degrees whenever coming to a stop then goes down to 160 deg when pulling out and back to 195 deg until stopping. Also heat isnt good inside cab when turning it on

My car has 194000 miles.
My car has an automatic transmission.

Hi Michael. Thanks for contacting us today. Usually, this type of issue (when the heater isn’t working well and temperature issues) is caused by an obstruction of debris inside the heater core. Coolant flows through the heater core to supply the heat (as the engine temperature increases). If there is debris trapped in the heater core, these type of issues can occur. If the debris is not removed, or the heater core replaced - it can lead to serious overheating issues.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. 1994 k1500 5.7l replaced 195 deg thermostat then a month later temp guage rises to 210 degrees at stop light then goes back down a

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: 105k miles on the chassis AWD model Starting Issues

I would verify that the battery is fully charged and that the terminals are clean and tight. I have seen people forget to remove the plastic protective cap on the battery terminals, too. Corrosion on the cable ends or battery...

Q: Q: Weird noise

Hi, thanks for writing in. This may be a variety of things ranging from bad or worn wheel bearings to loose or broken suspension parts or potentially a driveline problem. Often times U-joints that have too much clearance in them...

Q: Q: Fuel Pressure

Hi There, It sounds like you may have a problem with maintaining fuel pressure and getting the proper amount of fuel to the fuel injectors. As you know, when you turn the key to on, the fuel pump is activated...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...