Cooling fans dont work

What fan? interior or radiator cooling?

check the fan relays one of them is toast

Chuck Smith, why are you answering an unanswered 11 year old question? :>D

Always include a link as proof. This vehicle has three relays.
Relay FAN CONT #3
Secondary Cooling Fan (Passenger's Side) Relay FAN CONT #2
Cooling Fan Control Relay Relay FAN CONT #1
Primary Cooling Fan (Driver's Side) https://www.startmycar.com/ca/chevrolet/impala/info/fusebox/2001..

Your electric fan should only kick on when the van tells it to. The way this is accomplished is by a sensor. I dont know where it is located on your vehicle specifically, but they are sometimes located in the radiator (common for aftermarket fan kits).

Check the rad fan relay i have seen that failure common on that car

check for cooling fan relays

Locate and replace the fan relay, you can purchase a electrical component locator which is packaged on cd repair manual at ebay motors $20.00.

HOT WIRE COOLING FAN USING THE BATTERY AND A JUMPER WIRE.IF FAN WORKS.YOU HAVE A BAD FAN FUSE OR RELAY.AND A FAULTY ECT SENSOR.IF FAN DONT WORK WHEN YOU HOT WIRED IT.THE FAN MOTOR IS BAD.

no the flush will not help. Will the fans come on when you turn the ac on.. You should have a fan relay under the hood.. Have you hooked up a scanner to the computer.. If it never gets hot enough it wont turn on. The fan is computer controlled by a modulated ground. If you dont get a ground signal at the motor when at 230 degrees you may have a defective PCM.

The electric fans on some vehicles dont stay on all the time. If the radiator is not burningyou then i would suspect the guage is bad. The engine would throw a code if the fan was not working properly, so im pretty sure that your fan is working properly. I hope that helps you out.