2000 chevy lumina. Is fan supposed to come on when car is started. Car overheats after 20+ miles. Have never heard the fans come on. Car thermostat replaced along with upper intake manifold gasket which was leaking. Car runs great untill it gets hot, then back surges. will not do this as much if heater turned on.
No fan comes on when engine cold start up .but it will come on when you turn on air conditioning or defrost on .if engine idling a while when temp get 190 degree the fan will kick on.if over heating you got air in system .wait until cools check coolant add more .crank engine let it idle few. minutes when start warming up turn off engine wait a while before removing radiator cap so you wont get scald.add more coolant .crank it again starting warming up turn off engine wait a while .add coolant .keep doing this procedure until your coolant stop dropping off .if you do this more than 6 times you got a leak some where.check crank level for signs.if oil level higher than normal.if everything looking good.when engine cool make sure add coolant to over flow jug cold level mark.
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Whenever I am idle or driving slow my car gets very hot, and continues that way until I start to drive faster. I checked the fans and they will not turn on no matter how hot my car gets. What do I need to replace first? The fan, the sensors, relay, or something else? I would appreciate the help.
changed fan,thermostat,pressure cap its a2000 chevy cavalier 2 door
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