Question about 2003 GMC Envoy

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2003 GMC Envoy-the blower motor will not shut off even when key is removed form ignition. It continues to run even when relay in fuse box is removed. I have a similar problem with the A/c blower not shutting off. The only way I can stop it form running all the time is by removing the fuse. Took it to te dealer, I'm told that its either a control module issue or a resistor issue. Could even be some wiring damage. I'm told that the approximate cost to fix it would be about $400.00. If someone knows what needs to be done (apart from suggesting that I take it back to the dealer), would appreciate a response

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The connector fpr the resister which should be located close to blower motor counld be melted from overheated resister. you should check and replace resister and connector.this should be your fix. thanks and good luck.

Posted on May 28, 2009

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SOURCE: need to find blower resistor for 2003 GMC envoy

ITS UNDER THE RIGHT INSTRUMENT PANEL.YOU HAVE TO MOVE THE GLOVE BOX DOOR.TO GET TO BLOWER MOTOR AND RELAY AND THE RESISTOR.

Posted on Jun 06, 2009

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Front blower motor quit working replaced ignition switch,control module,resister,and blower motor but still doesnt work fuses are all good where do i look next


normally it is the resistor,( relay) then resistor module then motor.
did you test the relay(I believe located under hood, relay/fuse center), If OK check plugs and wires for melting, damage and good connection, grounds should also be checked. Use a volt ohm meter to see if you are getting any power ti motor,etc.
the first link below gives good how to diagnose blower,press the helpful button
GM Blower Motor Resistor Diagnostics by Wells

DIagnose and Replace GM blower Control Module

http://www.gmcproblems.com/tsbs/Envoy/2003

Jan 30, 2016 | 2003 GMC Envoy Xl

1 Answer

GMC 2004 Envoy blows heat even with blower off ... Why ?


The relay in your blower motor is stuck on, there is a TSB for this issue. Replace the blower motor resistor and you'll be back in business.
How does the resistor get power if the fuse is pulled?
Replacing the resistor will cure both problems. TSB is a technical service bullitin seen below
Subject:HVAC Blower Motor May Run Continuously After Vehicle is Turned Off (Replace Blower Resistor Relay)Models:2004 Chevrolet Avalanche, Silverado, Suburban, Tahoe, TrailBlazer, TrailBlazer EXT2004 GMC Envoy, Envoy XL, Sierra, Yukon, Yukon XLwith Manual Control HVAC (RPO CJ3)Built Prior to August, 2003

Jun 04, 2013 | Cars & Trucks

1 Answer

I have a 2003 Envoy XL, 116K miles. Yesterday as I was driving I noticed that the AC blower speed was not changing as I pressed the buttons to change speed. If you shut the entire climate control unit off,...


You need to replace the BLOWER MOTOR CONTROL MODULE. its up under the dash, near the blower motor. Your dealer or a AC DELCO parts house will have it in stock, very common problem.

Sep 02, 2011 | 2003 GMC Envoy Xl

2 Answers

Blower motor continues to run when vehicle is off


Your problem is the Relay which is encased inside the Heater/AC Resistor Module. This is a very common problem with GMC and Chevy Trucks. The Relay's return spring fails and the relay is held closed by gravity. The only fix is to replace the Resistor Module. I have a 2004 Silverado and have replaced the Module 3 times and the Blower Motor twice. The Orange wire feeding the Module is always Hot (12V) and feeds the Relay Contact for Highest Blower Speed. Hence the Blower runs all the time even with the Key off and removed.

Oct 02, 2009 | 2003 GMC Envoy Xl

1 Answer

I have 2003 gmc envoy my front ac control does not


Need to check to see if the blower motor is running.If it is,but not threw the vents,most likely a vent door actuator motor.The actuator motor in this case would be bad,it is hard to get to,unless you are mechanically inclined,You can do it your self.If the blower motor is bad,just replace it.Check fuses first,and the blower relay.If I can help,let me know.

Aug 29, 2009 | 2003 GMC Envoy Xl

1 Answer

Blower motor will not turn off even with relay pulled.


replace the blower motor speed control module, it is shorted.

Jun 21, 2009 | 2003 GMC Envoy

1 Answer

Why does my heater keep running after I shut my Envoy off?


I have the same problem. I have also been searching the web for a solution. I came across someone saying that it was the heater module located behind the glove department. I can't find now where i read this but it said the part was approx. $150.00. He was having same problem as us, heater wouldn't obey touch commands to turn on/off or when heater did blow it would only blow real low or real high. Like you, after turning off engine blower motor was still running even though it wasn't blowing air out.
I'm tired of paying for things that are not due to normal "wear and tear" on my 2003 Envoy. Let me know if this helps you and how you repaired it. I'll probably have to take mine to the shop but because I'm a "girl" I swear they think I'm crazy with all my Envoy complaints.

Dec 01, 2008 | 2003 GMC Envoy

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