Question about 2000 Pontiac Grand Prix

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My 2000 pontiac grand prix, the Engine temp heats up when at idle, returns to normal temp when at high speed and now it is almost at the overheating level whether i'm ideling or driving, Is it the Thermostat? I have not tried anything yet, i'm know car expert my any means.

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The initial problem points to the radiator fan(s) not running at any road speed. Check the fan(s) for noise-free turning by hand. Check fan fuse and relay (swap with similar relay). Turn on the air conditioner which should immediately turn on the fan(s). Overheating while driving could very well be the thermostat--you will need to drain the cooling system before replacing the unit. Blow out the radiator core with compressed air from the engine side to remove bugs and other debris first. Hope this helps!

Posted on Oct 02, 2010

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