Blazer runs hot even after replacing thermostat. it also is showing hot after the engine is off.
You might need a new temperature sensor.
SOURCE: engine running hot after thermostat installed
you have a bad water pump the water isnt circulationg as it should so you need to replace the water pump and soon before it causes damage
SOURCE: no heat in 2001 blazer. only blows cold air
check for heater hose and or heater core clogged.
SOURCE: 2001 Chevy Blazer. Service engine soon light on.
The temperature sensor is located on the intake manifold by the thermostat housing. Check the wire leads first and if that's good, replace the sensor and thermostat. The 4.3 was programed by the factory to run it's best at 190'", if it runs too cold. The mil light comes on indicating a temperature sensor failure.
SOURCE: 2001 Chevy Malibu - have changed out thermostat
check to make sure fans are working for radiator. if not check coolant tempurature sensor, fuses, and relay. is all air out of coolant system!
SOURCE: 2001 chevelot malibu 3001 engine
this engine needs the water/coolant blead on the top of the engine you should see a pipe with a screw insert ,if not find the top hose ie any water hose at the top of the engine and open it while the engine is running.You should see water /air coming out if the pipe keep going until all air/bubbles is gone.With all air gone the system should be ok,ren for 2 miles and blead again.please rate this answer.adrian,,,,,,,,,,,,,,
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