Question about GMC Denali
I have a 2005 gmc Sierra 1500 and the radiator fans are staying on after the truck is off had to unplug them and it still drained my battery dead
Check the repays that run the fans or the coolant temp sensor
Posted on Dec 02, 2012
Its coolent temp sensor for the radiator fan check it if not that a bad radiator fan relay.
Posted on Dec 02, 2012
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Posted on Jan 02, 2017
On most GMC Models and CHevy for that matter. There is a hole towards the bottom but still on the side of the radiator. I had to run a small hose from that port to a container on the ground. I did this for a few times and it really helps keep your garage floor clean and clear. I also found it to be a bit of a nuissance to flush the radiator.
Posted on Oct 24, 2009
The switch or the wire harness at the blower motor has gone bad. The highest setting 5 has no resistor, so the blower runs on high but the high current flow ends up burning up the switch's contact on that setting or the resistor wire harness at the blower motor has gone bad. Common would be the switch it self, if the switch is good. Then it's going to be the wire leads at the speed resistor by the blower motor under the glove box by the passenger leg compartment. Keep me posted, be glad to help you get your Sierra running 100% again soon.
Posted on Jan 06, 2010
If you read the label on the radiator shroud/fan cowls, you will see that it says "Warning--These fans may operate at any time, even if the ignition is off."
This means that the computer monitors the coolant temperature through the sensor in the water neck, block, or radiator, and turns the fans on if any of them reports (true or not) that the coolant is too hot.
Obviously, there is nothing wrong with the fans, because they run.
First, check your coolant level; if it's too low, then the engine actually boils the coolant in the radiator, causing it to flash over to steam, which is hotter than the thermostat is set to allow the engine to operate. Check this in the radiator itself, not the coolant bottle, with the engine of course cold at the time of your check.
You have, at the least, a false signal from one of these sensors.
You could also have a faulty fan relay in the distribution box under the hood on the driver's side of the vehicle.
You could also have a faulty ECM (hope it's not that one...$$$).
Please let me know if this helps you, and remember to vote/comment.
Posted on Feb 16, 2010
The blower motor is on the passengers side under the dash.You might have to remove the a lower panel.This is the insulator panel.If the blower works at all just turn it on and follow the noise.Hope this helps.Good luck.
Posted on Apr 08, 2010
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