2000 impala overheats when you use the heater when you start the car. if you don't turn the heater on when you start it you can drive all day

SOURCE: 2000 3.8 Impala keeps overheating even after

Sounds like there could be an air pocket in your cooling system. If the job was done by a mechanic take it back. If a "friend" helped you, tell him to rebleed the system. Also seems like your water pump might be bad. If it was overheating before changing the thermostat and is still doing the problem only worse then I would assume the pump needs to be changed. If the pump is bad, there is no doubt that air is in the system still and causing the overheating to occur even faster.

Testimonial: "Thanks will check....how do u check water pump or fan relay"

SOURCE: 2000 chevy lumina. Is fan supposed to come on when car started

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.

SOURCE: 2002 Chevy Impala low coolant light is on

I had this same problem with my 2002 3.4L engine impala. Unfortunately, there was a coolant leak at the lower-intake manifold, caused by a cracked gasket. I replaced the gasket, water pump, thermostat, spark plugs and wires and flushed out the heater coil. Didn't find out what it was until after spending 100s on Dex-Cool. I kept refilling it for months until I got a good mechanic to fix the problem whom told me that this is a common repair on older impalas and GM vehicles with 3.4 and 3.1 engines.

SOURCE: my 2000 impala will not

I had a Nissan doing this to me a little while ago, but couldn't figure out the problem. A couple weeks later, the lady told me she took the car to a shop and they replaced the crank and cam sensors. My bet is that it was the crank sensor.

Joe Taylor

• 2229 Answers
• Posted on Aug 04, 2011

SOURCE: I have a 2000 chevy

This is a common problem on GM vehicles in general. Go to this link to learn about the system, see pictures, and find a GREAT permanent solution.

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