Q: The heat isn't working in my 1995 GMC

asked by on

I changed heater core thermostat blend door actuators but heat still not working. Could it be water pump or radiator? Also radiator car. After letting run reaching normal temp the hose hot but soft. The ones going to heater core are cool

My car has 143000 miles.
My car has an automatic transmission.

Hi there. The symptoms you’re describing (especially the soft radiator hose) along with the fact your heater is not working may be caused by restrictions in the coolant line such as an air bubble. This could have happened when you replaced the heater core thermostat, especially if you didn’t flush the coolant from the radiator during this service. However, it could be a problem with the water pump, so it’s a good idea to have a professional mechanic, such as one from YourMechanic, complete a heater is not working inspection, so they can pinpoint the exact source of your GMC’s 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. The heat isn't working in my 1995 GMC

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: Q: Car is leaking coolant and overheating

You should not let the engine ever run low on coolant. When you get the system checked the mechanic will pressure test the cooling system and locate the leak or problem for you. You should not have a hot engine...

Q: My heater and airconditioner quit blowing out air.

Although the blower motor might not be running because a fuse blew, the problem is fuses usually blow due to an electrical malfunction in the circuit such as a short. Fuses are simply "protection devices" and when they blow it...

Q: Randomly shuts off no matter how much fuel is in vehicle, no acceleration/stalling when pushing pedal.

Hello and thank you for writing in! When was the last time you changed the fuel filter? The filter can have a huge effect on how much fuel is delivered to the engine. With the age of your vehicle, there...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...