Question about 2003 GMC Sonoma Extended Cab
Blowing cold air
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Posted on Jan 02, 2017
SOURCE: 2005 GMC air conditioning
i stated my post in the clarification post and you can not rate my solution and since rating is just as important to us as answering your questions, can you please rate me in this post?.
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Posted on Sep 23, 2008
SOURCE: 200 gmc jimmy st heater
check that the gate valve is operating properly on your heating system,
check that you have the propper amount of coolant and the propper mixture,
check the temperature of your thermostat and that it is working propperly,
To test your thermostat remove it from the vehicle and boil a pot of water on the stove, when the water is boiling drop the thermostat in and it should open, if it doesn't it is no good.
I would also recommend installling a195 degree thermostat if you live in a cooler climate.
Posted on Oct 25, 2008
SOURCE: rear heat in 2004 gmc
I have a 2006 yukon and have had to replace the actuator in the rear heat/ac twice. It moves a valve that closes the cold/hot ducts. It is a cheap defective part/design.
Posted on Nov 07, 2008
Odds are your heater core isn't working or plugged. Check your passenger floorboard for water, and replace the heater core. If that doesn't fix it, get a coolant system flush.
Posted on Feb 12, 2009
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