Question about 2006 GMC Sierra

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2005 gmc sierra. blower does not work on any setting but i can feel temperature settings work right at the vents. want to diagnose my blower. where do i start?

I have a 2005 gmc sierra. the blower does not blow on any setting. when it went out it just didnt work once and then worked fine the next day and then didnt work at all the day after that. i can diagnose the problem i just don't know where to start.

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First check that the blower has power to it and when turned on a varying ground signal when the speed switch is moved between the speeds. You will need a DVOM to test this.

Posted on Mar 19, 2014

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GMC has had some problems with the wiring connecting to the blower melting. It also could be the relay. Call a GMC dealer to have the problem fixed if it is from overheated wires and it should be covered under a not so well known recall. My 2006 was covered and I did not know it until I went to pick it up and they said "no charge". In this case I was glad I went to a dealer. Good luck, Richard

Posted on Mar 20, 2014

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Posted on Jan 02, 2017

  • 172 Answers

SOURCE: 2005 GMC Sierra 1500 - heater blows, but only cold air

Check coolant level. Check for heat at the heater hose going from water pump to heater core at firewall. Check to see that cable is moving coolant control valve from the closed to open position. Low mileage so it shouldn't be plugged heater core.

Posted on Jan 07, 2010

Testimonial: "You were absolutely correct. Low coolant level. Put in some 50/50 and we're nice and toasty now, but need to find out why coolant was so low. Thanks."

  • 9 Answers

SOURCE: 2005 GMC Sierra heater blowers work fine but only

check the coolant level in radiator. if its low it will only circulate while driving, and not while idling. May also be a bad water pump. See a professional for that.

Posted on Nov 08, 2010

honeymokey
  • 3113 Answers

SOURCE: 2005 GMC SIERRA - HEATER BLOWER WASN'T WORKING -

High blower relay.

Posted on Dec 30, 2010

weekspena
  • 375 Answers

SOURCE: 2005 gmc sierra...took blower motor

their is a blower motor relay in the fuse box under the hood more than likely your problem!

Posted on Jan 13, 2011

  • 233 Answers

SOURCE: I have a 1998 gmc sierra and no matter what

need to replace vaccum controls or vaccum line may have came off in back of controls

Posted on Jan 29, 2011

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Blower motor not working 2005 GMC sierra resister ground pin burnt


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05 GMC sierra heater blower stopped working. It used to work on setting 1-4 but lost 4 a couple weeks ago and now none of them work. Is this a bad blower , resistor or both?


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Check the fuse first thing. If the fuse it good then either the blower motor speed control switch, blower motor resistor pack, or the blower motor itself is bad. Normally the speed control switch rarely goes bad. If some of the speeds did not work prior to total failure then the resistor pack is bad. If that is not the case then apply 12 volts directly to the blower motor to see if it is good. If it runs suspect the resistor pack as the culprit.

Jul 15, 2010 | 2005 GMC Sierra

1 Answer

Heater blower in 1998 gmc sierra 3500 isn't working . replaced the blower motor but still no blower. any other suggestions


did you check the fuses and did the motor come with a new heater resistor or is it separate

Apr 25, 2010 | 2005 GMC Sierra

2 Answers

2005 GMC Sierra 1500 - heater blows, but only cold air


Check coolant level. Check for heat at the heater hose going from water pump to heater core at firewall. Check to see that cable is moving coolant control valve from the closed to open position. Low mileage so it shouldn't be plugged heater core.

Jan 07, 2010 | 2005 GMC Sierra

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

2 Answers

2005 GMC Sierra - 1. started out with blower


Have you had the blower motor switch replaced? I had a Chevy Silverado and the low worked but no other settings. It is a pretty quick fix and reasonably cheap.

Oct 23, 2009 | 2005 GMC Sierra

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