Question about 2002 GMC Envoy

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2002 GMC Envoy

My heater blower does not work on setting 1 or 2. It works fine on 3, 4, or 5. What is the problem? And how do I fix it.

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Sounds like the blower motor resister to me this piece controls the speeds of the blower motor it should be close to the blower motor on the passenger side it should have wires going to the blower motor very easy to replace.

Posted on Jan 08, 2009

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2005 envoy heater blower will not work on speeds one to four but five works fine


You likely have a defective blower motor resistor pack and/or a damaged connector attached to the pack. These parts are located near the blower motor behind and below the glovebox.

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2002 GMC Envoy heater Problem heater fan under dash-shuts off, but still shows full blower off and on.


will try to help but i think you'll need to have that blower replaced. if it's coming on for a sort while and then shuts off after running a short while it sounds to me like the blower motors heating up inside and then shutting itself off due to a short in the blower motor itself. no really quick fix i know of other than replacement of it. hope this helps and thank you for choosing fixya.com

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Heater on my envoy only works on 3-4 setting, could that be the switch.


Thanks for the opportunity to let me help. The blower control switch in your vehicle also uses a blower relay. This relay is generally located on the firewall on the passenger side near the heater fan. You can also look in you vehicle owners manual for the location of the blower relay, it may be also be located in the fuse and relay box under the hood. Generally speaking if the highest setting doesn't work on a GM vehicle it is a high blower Relay. This item is not expensive and can be purchased at most all you local Auto parts stores. If you have a Napa, Orielly's, or AutoZone these stores will also likely help you in the location if you are unable to locate this relay. Here is a general picturepepsiman1967.jpg The installation of this relay is either to remove from the fuse box, or if located near the heater fan housing then you will need to remove the mounting screws, remove the wiring clip, then reverse to install. I hope that this has helped you. D.R. Wilkins

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2 Answers

Heater on 2002 gmc envoy does not turn on until you reach the setting 4 and then if you do that car dies, was told this is caused by resistance???


Blower motor resister,but shouldn't kill the car.It is mounted under the dash on the passinger side next to the blower motor.All is incased in a plastic cover.You should only have to remove the front screws to get to it.Well good luck and hope this helps.

May 16, 2010 | 2002 GMC Envoy

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The blower speed switch only works on 5. The


this problem is caused by a defective blower speed control resistor, it is located near the blower motor, very cheap to replace, part is around $35

Oct 26, 2009 | 2002 GMC Envoy

1 Answer

2002 envoy heater dial only works on the #4


Yes. This is a all too common problem. Replace the resister and it will work like new. Its located under the passenger side dash panel on the under side. Two screws and a plug and your done in 20mins.

Sep 28, 2009 | 2002 GMC Envoy

1 Answer

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If only some of the fan speeds work this is always the blower motor resistor located in the hvac case inside the right front of the vehicle where your passenger feet would be.the blower motor resistor is available at most larger parts places.I replace 2 or 3 of these a week. Good luck

Aug 22, 2009 | 2002 GMC Envoy

1 Answer

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replace the resistor 4 the blower motor that should slove that hope this helps

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1 Answer

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had same problem on my XUV. changed the blower motor resistor, located under passenger side dash. easy to change, works no problem.

Jan 20, 2009 | 2003 GMC Envoy

1 Answer

2002 GMc Envoy Blower motor isnt working


do you have power to it..or a bad ground around blower motor? is the head unit not signaling the blower to run?...calling it with A/C or heat or just fresh air ..try all settings and advise...good luck

Jan 08, 2009 | 2002 GMC Envoy

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