Question about 1994 Chevrolet Silverado 2500

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1994 Chevy Silverado temperature guage shows hot

I purchased a 1994 Chevy Silverado recently. It has been running good - but the temperature guage has started running hot (although the truck does not seem to have any problems). My son replaced the thermostat. He's changed the oil. He's replaced both sensors and the guage shows it's still running hot. He's now getting ready to flush the radiator and replace the coolant. He's going to also bleed the air out from where he replaced the thermostat (I believe). The water pump is fine and there is nothing leaking on the driveway. If the temperature guage still shows hot after flushing the radiator and replacing the coolant, what else could it be?

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  • Sherri7 Jun 02, 2009

    Well, it appears flushing the radiator, adding new coolant, and replacing the radiator cap did the job (along with everything else we did). Thanks for the advice.

  • Richard Scordino May 11, 2010

    You are going in the right direction. One thing though...radiator flushes available over the counter often are only good for minor internal problems. Sometimes a good radiator shop can get better results. Also check between the radiator and a/c condenser to make sure that there aren't any obstructions there...leaves etc can get caught in there and cut off air flow partially giving you the same results.

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Flushing the radiator, replacing the radiator cap, adding new coolant, replacing the sensors and a new thermostat solved the problem. Probably didn't need to do all of these things - but since we just purchased the truck, and given the fact that is probably hadn't been done in a while, we chose to do all of these things (which really didn't cost a whole lot), it's running like a charm now.

Posted on Jun 03, 2009

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