Question about 2005 GMC Sierra 1500 Hybrid

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The heater control does not work on 5 speed whats wrong

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The blower resistor is bad. it's located under the dash on the passenger side

Posted on Nov 18, 2009

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The blower fan works on 1 throuth 4 but not on no.5 what could be wrong?


Could be your blower motor resister,here's a link to what it looks like,it's located by nblower motor,just a couple of screws hold it on.Autozone will refund part if it doesn't solve problem.Here's where the blower motor is..

Dec 29, 2012 | 2001 Pontiac Aztek

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Heater fan speed control inside car has 1 to 5 speeds, only 4 & 5 worked for a year or so. Now only 5 works. Fuse problem or what?


no sounds like u have a switch problem :) i would reccomend replacing the switch... Hope this helped

Feb 26, 2011 | 2002 Buick Rendezvous

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Low speed on heater fan does not work. All other


You will need to inspect and test the speed control resister and the speed control knob first. What have you done so far?

Apr 22, 2010 | 2002 Chevrolet Silverado

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Heater controls


It may be your blower motor RESISTOR, in gm cars it may look like a card that is connected near the blower motor,under the dash, on most cars this is what gives you variable speeds, except on the HIGH speed is usually wired directly to the battery through a relay.

Mar 29, 2010 | 2001 GMC Yukon

2 Answers

Heater control fan only works on speed 5. Removed heater control, what does the resistor look like? I'm asuming it's not a regular electronic resistor right?


Your looking for the blower resistor. Its on the passenger side under the dash. Two of the wires go the the blower motor. The wire connector and the resistor can burn or corrode. The replacement is easy two screws hold the resistor in and the connector can be replace with **** connectors.

Dec 12, 2009 | 2002 Chevrolet TrailBlazer

2 Answers

My heater only works when i go above 50 miles an hour, and it only blows one speed, what is wrong?


Having to increase speed to get any heat means that your coolant may be low, as far as only 1 speed, the switch for the heater may not be working properly

Nov 12, 2009 | 1995 Ford Contour

1 Answer

Heater fan control


It is under the right side of the dash. Blower resistor and relay.

Aug 16, 2009 | 1991 Chevrolet S-10

1 Answer

In my truck, the fan only works on number 4, what could be wrong and could i fix it myself?


Could be the resistor. It may be either under the dash or under the hood. You can buy one and put it in but check all the fuses first. The resistor is a thing that goes into the heater box . It controls the fan speeds. The highest speed is usually handled by a relay. The resistor has these coil spring like things on the backside and they can burn out. You won't see them until you remove it. It will have a plug in with fairly heavy wires, maybe 5 or 6 wires

Jul 07, 2009 | 2004 Ford F150

1 Answer

Heater fan switch runs on #5 speed only, 2000 Chevy Malibu


you need a blower motor controller. call your local bmw dealer thay will know what you are talking about cause thay have had trouble with this. i think thay offer a updated part.

Feb 25, 2009 | 2002 BMW 5 Series

1 Answer

No heat , fan runs on speeds 3,4and 5 not on 1 or2


coolant flows thru heater core all the time temp is controlled by doors.you have a blockage in core,try removing hoses and backflushing heater core probably a little bit of scale stopping inlet.the fan speed is probably the blower resistor it is locateed next to blower motor under dash check the plug they burn up

Dec 09, 2008 | 1999 Chevrolet Silverado 1500

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