Question about 2004 Chevrolet Silverado

3 Answers

Blower won't shut off

2004 chevy 2500 truck, blower motor stays on high, can not adjust speed or turn off.  Blower stays on even when truck is shut off and key removed.  Only way to shut off is to disconnect battery or remove fuse. 
Thanks for any info.

Posted by on

  • 2 more comments 
  • Anonymous Feb 27, 2009

    Have '97 Buick LeSaber and blower moor will not turn off unless battery disconnected

  • gio35 May 21, 2009

    I replaced the resistor and wires on connector aren't melted. Harness only has 3 wires, black, red and purple with grey stripe

  • bob dick
    bob dick Feb 18, 2014

    my 2002 will not shut off , and with the key off and turning the blower switch to HI, the headlights come on ? Is this still the Resistor being bad? The green foil on the resistor is blistered off both sides

  • Anonymous Mar 24, 2014

    blower motor caught truck on fire.
    glove box reshaped and some electrical something on the side of glove box.
    what is that.
    blower melted out of duct work and is now melted into carpet. Thanks chevy.


3 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 29 Answers

You will need a Blower motor resistor and maybe a blower motor resistor connector end. If you look under the dash on the passenger side(may need to remove smooth black cover, vents will be sticking out) you will see a connector going straight up into the blower motor resistor(7 wires/slightly in front of blower motor). Pull out the connector and check for melted terminals/wires. If no melted terminals just replace blower motor resistor with part # 89019088 per GM to revert to part before 04 in order to stop blower motor resistor relay from hanging. Let me know if i can help more.

Posted on Jan 02, 2009

  • bob dick
    bob dick Feb 18, 2014

    My 2002 2500 HD will not shut off either, and with the key off and turning the blower switch to HI, the headlights comeon. Is this still the resistor replacement?


  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

I had the same problem, 2004 Silverado. If it bothers you to have the blower running while you are working on replacing the resistor, disconnect the positive batter cable before starting. I bought a BWD blower resister (part # RU1064) from Action Auto for around $28. It will work, however the mounting brackets are not the same, so I used black tape to stablize the unit. I think you COULD buy the OEM one, probably a little more $. Step by step solution as I did it:
1. Use a 7mm ratchet to remove the 4 screws holding the large plastic cover under the dash. You will need a small extention for the middle screw. Remove the cover.
2. Locate the motor resistor to the right. Using a 5.5mm ratchet, remove the 2 screws holding the unit in place. Remove the 7 pin connector from the old unit. Follow the 2 strand wire up and remove the connector from the blower. A small screwdriver is helpful for removing the connectors.
3. Connect the new, 2 wire connector to the blower. Connect the 7 wire connector to the new resistor. If you are installing the unit I mentioned, you may want to secure it with a couple of strips of black electrical tape.
4. Test the new unit to make sure all connections are good, then re-place the cover.

Posted on Dec 30, 2009

  • MuchThanks Dec 25, 2010

    Spider48757 - Absolutely amazing detail and completely right on. You saved my Christmas. My blower would not shut off on Christmas Eve, of all times! Not one Service Garage would take my vehicle due to the holiday and I had to travel out of time. So I searched and found your write-up. Found an auto parts store before they closed for the holiday and followed your directions, Worked like a charm! Made it to my destination and after spending time with the family, next was to send my thanks to you! If there is such a thing as karma, you will certainly be rewarded for your good work here.


  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

1990 chevy 1500 truck, blower motor stays on high, can not adjust speed or turn off as well the heat is on full. Thanks for any info.

Posted on Mar 08, 2009

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

I have a 95 Buick Roadmaster D blower motor will not shut off even if the key is out

sounds like a blower motor relay or control module. have it check first with your mechanic as the part for your car is expensive. goodluck

Mar 28, 2017 | Buick Cars & Trucks

1 Answer

Missing variable control voltage on the blower fan control module on a 2008 Buick lucerne

What are you using to test this control signal ? Were you on right wire ?
Blower Motor Control Processor The blower motor control processor is an interface between the HVAC control module and the blower motor. The blower motor speed control, battery positive voltage and ground circuits enable the control processor to operate. The HVAC control module provides a pulse width modulation (PWM) signal to the control processor in order to command the blower motor speed. The processor supplies 12 volts to the blower motor through the blower motor voltage supply circuit. The control processor uses the blower motor ground as a low side control to adjust the blower motor speed.

Chevy Trailblazer EXT Blower Motor Won Turn Off The blower motor in this video don't shut off , but he show's how to test the PWM signal right !
Your blower motor control module is probably bad , or HVAC control panel is bad , or a wiring problem !

Sep 26, 2016 | 2008 Buick Lucerne CXL

1 Answer

Why won't blower shut off?

03 - 06 Silverado/Sierra blower stays on with key off (how to ...

? 1:32
Apr 7, 2014 - Uploaded by MAY03LT
The HVAC blower in this 2003 Silverado stays on speed 5 even with the key off. Here's how to turn speed 5 of the blower off(while keeping speeds 1-4) and ho. ... How to replace blowermotor resistor in Chevrolet Silverado - Duration: 5:06. ... 2004Tahoe rear brake service (replace pads, clean/lube slides, ...

Blower motor won't shut off. - Diesel Place : Chevrolet and GMC ...

Jan 10, 2008 - 11 posts - ‎7 authors
I have read through many posts on blower motor issues but no one had the same issue I have. ... If I shut the truck off, it still won't shut off and runs until the battery is dead.... 2002 GMC Sierra RCLB 1500 4X4 SLE, 7 1/2' Fisher plow.

Question - Blower Motor Won't shut off ' Chevy Truck Forum ' GMC ... > General > Maintenance

Dec 11, 2015 | 2004 Chevrolet Silverado 3500

2 Answers

Blower motor will not shut off

I can't speak to the cost, a local dealer can do that. As for the reason the fan runs on, it sounds like either a stuck power relay (location should be in the owners manual) or a bad fan speed regulator. Since the fan is stuck on high, I suspect the fan speed regulator is bad. On some cars the regulator is part of the fan assembly, and on some it's separate. Also, there is a possibility you can repair the circuit board, assuming it's something as simple as a burnt out diode. Best of luck!

Jan 19, 2012 | 2005 Chevrolet Impala

4 Answers

The interior blower will not turn off even when


Jun 24, 2010 | 2004 Pontiac Grand Prix

1 Answer

91 chevy Siverado 2500 AC Blower problems

My guess would be the same as yours. Good job.

Jun 23, 2010 | 1991 Chevrolet Silverado 2500

1 Answer

1998 oldsmobile 88 - heater blower motor won't shut off

more than likely it is your blower motor resister

Apr 11, 2009 | 1998 Oldsmobile 88

2 Answers

Blower motor stays on high, even with key out

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

Dec 24, 2008 | 2002 Chevrolet Silverado

Not finding what you are looking for?
2004 Chevrolet Silverado Logo

3,681 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

71288 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22059 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7009 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides