To change a thermostat on a 2003 Chevy Impala remove the connectors to the battery, wait for the coolant system to be drained and take out the radiator hose. Remove the thermostat and clean it's component, position the thermostat, put the new gasket on top of the thermostat and put engine oil on the bolts. Attach the radio hose and fill the system with coolant. Put the negative part of the battery cable to the terminal and let the car run for a few minutes before driving.
Leaking isn't the only thing that can cause overheating in a car. It's possible that the thermostat has gone bad and needs to be replaced.
there is no such thing as a 1999 impala
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weher thermostat locaked for impala 2001
The thermostat is located in the housing and the engine end of the top radiator hose. Remove the 2 bolts and replace the thermostat.
When the engine overheats because thermostat won't open to allow the water to flow and cool!
The thermostat is located in the housing at the engine end of the top radiator hose.
Drain the radiator down 1/2 way. At the engine end of the top radiator hose is the thermostat housing. Remove the housing and install a new thermostat.
You can replace the thermostat on your 2010 Chevy Impala 3.5 by removing the water hose and the 3 bolts from the thermostat housing. The thermostat will come right out. Reverse the process to install the new thermostat.
The thermostat should be on the top of the engine under the water inlet. Drain the radiator. Remove the top radiator hose from the inlet. Unbolt the inlet, and pull the thermostat out for replacement.
picture of location of thermostat for 2000 chevorlet impala
deal with it buddy