Question about 2005 Chevrolet Silverado 1500HD
It's not all that uncommon for the temperature gauge to rise somewhat when idling with the a/c on in hot weather. When the engine is idling the amount of air that is being pulled through the a/c condensor, oil cooler, and radiator is greatly reduced and as a result the temperature of the coolant may rise by up to 20 degrees or so. Since your air conditioning is still blowing cool air that generally means that the radiator fan is working properly and able to remove the heat from the a/c system. Because the a/c condensor is ahead of the radiator all the heat that is pulled from the condensor then gets pulled [as hot air] through the radiator before finally being pulled into the engine compartment by the cooling fan, thus it is adds to the heat load that the radiator has to handle. Be sure to check your coolant level and keep a close watch on the gauge just in case you have something else going on [and of course make sure that the engine never actually overheats] but once cooler weather comes the problem will probably go away. One other thing you should check is too see how much crud has built up between the radiator and a/c condensor. There is a about a 2" gap between the two and it is a notorious spot for bugs, leaves, and other debris to collect. You might have to remove the top of the radiator shroud to see what has collected there and to wash out anything that has. Good luck, hope this helps a bit.
Posted on Jul 31, 2010
Look to see if it has a electric fan for the condenser and radiator,if it does not,the fan clutch is bad,if it does have a electric fan for the ac ,make sure it is coming on every time the ac is turned on.If this was at all helpful,please rate,thank you.
Posted on Jul 31, 2010
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Posted on Jan 02, 2017
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