over heating

Hi my friends, I want to tell you about my story with Malibu 01 v6
I saw the coolant is not clean so I decided to exchange it I bought new coolant and radiator flash , then I remove old coolant and put the flash with normal water for 30 minutes then I removed it ,
I put the new coolant but I got overheating on the engine the temperature goes between 1 and 2 bleeder over half gage . by the way I did bleeding for the system
Through the valve
After 2 weeks I replace the thermostat and I flushed the coolant system again with professional shop they removed the radiator out side the car and clean it very well then they return it back .
Now I am having same problem the temperature goes up when I am driving the car in low speed or parking
I wish to find some one to help me to resolve this problem

low speed or parked idle? sounds like the fan may not be working. see if it kicks on while parked. you should be able to hear and see it.

the fans are starting after tow blades of half gauge but as i think it is too late coz the engine will be too much hot
my car is a candian car

Was the car overheating before you did the first flush?

no it was not like that my brother :nono: