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Depending on what is actually wrong, it could be many things.
If you notice your coolant temp is taking forever to barely warm up.
(like forever to barely get to 100*) Your thermostat is stuck open, so coolant if free flowing through the system, being cooled off by the wind and cooling off the engine.
If your low on coolant, the heater wont work.
If your leaking coolant through a hole in the water pump.
The hole is called a weep hole, and the water pump will leak there right before it fails.
I've had these problems on different occasions with my 95 blazer with 125,000 (as of 11/12/11)
Im mildly mechanically advanced, and I've fixed these problems in my own driveway.
Hope this helps
Wiki User
∙ 12y ago
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