Question about 1999 Chevrolet Express

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Blower position 5 doesnt work

2004 gmc sierra blower pos 5 only will not work

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Check all your ac/heater fuses. there are some on the side of dash and some under hood. some vehicles have a fuse that runs the high speed blower operation. there may be several in each location, so check carefully.

Posted on Jul 29, 2009

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2004 sierra, fan blower stopped, not the fuses. where is the fan blower switch and how do I replace


get a voltmeter; check for 12vdc at the blower motor with the blower turned on; if there is voltage, the blower motor is bad; should be located behind a panel underneath the dash on the passenger side; if the fan works on 1 or 2 speeds, it is probably the blower resistor located in the same area as the blower; u can check utube for details

Jun 27, 2010 | 2004 GMC Sierra 1500 Crew Cab

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2004 gmc sierra 1500 blower motor location


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.

Apr 08, 2010 | 2004 GMC Sierra 1500 Crew Cab

1 Answer

Heater fan blows in position 3,4,5 but not 1 or 2


the blower motor resistor is fried...it is located under the dash, passenger side, costs about 10 bucks and takes 5 mins to install...happened to me, it needs to "resist" or limit the power for lower speeds, that's why it works in 3-5, no resisting needed.

Mar 03, 2010 | 2002 GMC Sierra

1 Answer

Heater only works on levels 3-5 . Levels 1&2 nothing happens


sounds like the blower motor resistor is bad. it's located on the passenger side under the dash behind the blower motor itself. Just changed mine on my 2004 sierra. Fairly easy job to do. Hope this helps :)

Jan 28, 2010 | 2005 GMC Sierra 2500HD 4WD

1 Answer

2004 GMC Sierra 4dr truck. the fan does not work


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.

Jan 06, 2010 | 2005 GMC Sierra

1 Answer

2005 GMC Sierra Denali - Installed new battery; driver a/c hot


need to go to dealer to have HVAC module reprogramed. whenever diconnecting battery power on these vehicles you can connect a 9 volt battery between neg and pos to keep the memory in the computers. I am an master ase technician and 5 classes from gm world class tech.

Jul 15, 2009 | 2004 GMC Sierra

2 Answers

No heat


Valve that allows heater core air to flow into compartment is closed.

Feb 21, 2009 | 2004 GMC Sierra

2 Answers

98 gmc pu blower doesnt always work.


Ive ran across this many times its usually the blower motor but I found that if I replace the blower and the replacement plug(thru GM)that the vehicles never had a blower issue again,so order up a motor and plug and be sure to solder the new plug dont use crimp fittings.have a good day DB

Feb 04, 2009 | 1998 GMC Sierra

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