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?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
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: Clutch pedal going all the way to the floor

This sounds like a hydraulic issue. There is a leak in the clutch hydraulics. The leak could be the master cylinder, slave cylinder, or a line or hose. Follow the lines from the clutch master cylinder down to the transmission...

Q: Heater not always blowing heat

This may be related to a faulty blower motor or blower motor relay. Occasionally, the blower motor itself will wear out or become faulty working intermittently as the brush contacts inside the motor wear out. The blower motor relay supplies...

Q: 1998 gmc 4.7 new plugs. Getting fuel to intake new filter fuel pump. Floods when trying to start.

Claimed by Jeff Engstrom

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...