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Item Condition:New
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This item is backed by our limited lifetime warranty. In the event that this item should fail due to manufacturing defects during intended use, we will replace the part free of charge. This warranty covers the cost of the part only.
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How To Install Replace Blower Motor Resistor 2002-09 Chevy Trailblazer
Created on:
Tools used
Socket Extensions
7mm Socket
Ratchet
7/32 Inch Socket
1. Remove the AC/Heater Fan speed control resistor
Remove the two 7 mm bolts securing the plastic cover under the passenger side dash.
Unclip the wiring from the panel.
Unplug the wiring harness from your resistor
Open the glove compartment and pull the hook up releasing the glove compartment.
Unplug the connection to the blower motor and the resistor.
Unbolt the two 7/32 in bolts and remove the resistor.
2. Install the new AC/Heater Fan Speed Control Resistor
Insert the new resistor and bolt into place with your 7/32 in socket and ratchet.
Plug in the wiring, both to the resistor and the blower motor.
Test your AC/heat fan to make sure it’s working properly.
Close the glove box.
Bolt the plastic cover back into place with your 7 mm socket and ratchet.
Brought to you by 1AAuto.com. Your source for quality replacement parts and the best service on the internet. Hi, I'm Mike Green. I'm one of the owners of 1A Auto. I want to help you save time and money repairing and maintaining your vehicle. I'm going to use my twenty plus years experience restoring and repairing cars and trucks like this to show you the correct way to install parts from 1AAuto.com. The right parts installed correctly, that's going to save you time and money. Thank you and enjoy the video.
In this is video we are going to show you how to remove and replace the blower motor resistor on this 2004 Chevy Trailblazer. This vehicle does have automatic temperature control. Tools you'll need are a 7 millimeter socket and a 7/32's socket with a ratchet, an extension is optional. First, you want to remove two 7 millimeter bolts, one there and then one over there. Now, this panel pulls down and you can see there are some connectors here. You can just kind of pry them away from the panel. This one, you can actually pry down on this little tab and then pull it off and then this comes out. Right up there is your resistor. See on this connector, there's a button way up high? Press that and pull it out. Now open up your glove compartment. See this little hook just pulls up and you can move your glove box down and you can see your other end of your connection goes into the blower motor right here. You see your connection is right here. That's a little hard to film.
What you want to do is take a screwdriver and kind of press up and push it out. As you look at this you can kind of see. There is the tab so you want to press up on that tab and pull it out. These are 7/32's and we will just fast forward as we remove those two bolts. A little hard to film here but there is just a little clip that I flipped the wires up and out of right up in there. Here is the old one, got some corrosion on it. The new one from 1A Auto, nice new gasket and everything. Everything is going to bolt in the same so I start with the bolt inserted already put it up in there. Start this bolt. Start that bolt. After the lead, there is a clip up in there that it kind of goes into. Begin this lead. Just reach in and our purple lead. And we will run a quick test here. Okay. Put our glove box back up. Now here I'm just going to speed through putting our harnesses, clipping them back into that panel and put the panel back up in there. Start the bolts an then tighten them back up.
We hope this helps you out. Brought to you by www.1AAuto.com. Your source for quality replacement parts and the best service on the internet. Please feel free to call us toll free us, 888-844-3393. We're the company that's here for you on the internet and in person.
HCA40047
In Stock
Product Reviews
Loading reviews
4.62/ 5.066
66 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
50
11
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2
Henry
January 23, 2017
Easy to install and works like a brand new heater and keeps the truck nice and warm now.
quick ship, quick fix.
john
January 29, 2017
price was excellent. shipping is very quick and free. part is exact duplicate of original. I will continue saving money with 1AAuto when needing parts for my Silverado. Thanks.
Israel
February 25, 2017
The part was perfect and the installion video was very helpful!!!
Great product, needs a warning
Stepon
March 20, 2017
Everything I bought from 1A Auto has been perfect in addition with the helpful vidoes, I have been able to make repairs in my garage for the fraction of the cost. This product came to me very quickly and it was in perfect condition. The only thing is that with my year model and type of truck the installation video had a different part that he was installing. This product requires you to cut the three pin connector from the climate control and solder to the red, black, and purple wires on the product. Just wanted to give you guys a heads up. Thank you for the great product at a great price.
Easy as pie
paul
April 30, 2017
Harness was exactly like the original. I just had to unplug the defective one and plug the new one in. Couldn't have been easier and it works great!
gm blower resister
M
June 22, 2017
I am very satisfied with the blower motor resistor and jumper harness everything was the same as the factory with the exception of it being the updated resistor which worked out to be great.
Inadequate wiring instructions
glenn
June 26, 2017
I still haven't installed this part for I'm not sure what to do with the additional wires.
AC working Great!
C
June 26, 2017
The part was perfect for the job! Great price! I would buy it again, and will contunue to buy parts from 1A. My wife was happy to have A/C running again.
It worked great.
Mark
June 27, 2017
Easy to install and worked perfect. Quick fix. The hardest part was to solder the three wires to the old wiring harness but other than that, no problem. I recommend the manufacture supply a jumper to eliminate the need to solder and wires.
Blower motor module
R
July 10, 2017
It was easy to install. Fixed the problem. Price was the best and fast shipping. I would buy from them again
My review
Mark
July 10, 2017
The product was priced lower than most other online stores. The quality is very good, and is performing as it should be. The only minor complaint I have, is no instructions were included. The online video tutorial did not include how to connect the 3 jumper wires, but I figured it out anyway. Other than that, great product for a great price!
Fast & Affordable
T
July 19, 2017
My AC stopped working on my 2006 GMC Envoy. After checking all the fuses I determined it had to be the Blower Relay. There were lots of choices online but I found 1A had the best price and free shipping. Their website was very easy to use and the product arrived in just 3 days. I am very happy to have my AC working again. Thanks 1A.
2004 Chevy Trailblazer Resistor Motor
W
August 7, 2017
The part works perfectly. The fitting was slightly off as my 2004 Chevy Trailblazer has a different wire harness port. But once I cut off the wiring harness from the new component from 1A and splice the wires it worked perfectly. Thank ya'll!
1A Auto parts
TONY
August 8, 2017
I needed a blower motor mod replacement, and priced one at my local auto store at $116. 1A auto had the same part for $42 which arrived and fit as expected.
Great value, and ordering / shipping was a breeze.
Blower resistor
Stephen
August 11, 2017
Shopped around forever to find a new resistor for my truck. The dealership wanted twice what I paid for on 1 A auto for the same part. The part I received from 1a was an aftermarket production that I had to require myself, at first I went to the dealer for a 'plug and play' resistor and found they had the exact same part for twice the price and I would have had to rewire as well. Very please!
Great Product; Wrong Installation video
Douglas
August 13, 2017
I have a 2003 Chevy trailblazer EXT. I ordered this resistor because my blower would not turn off. Research the part and watched the install video. Video waz clear and looked easy to remove and replace. Ordered the part and it is different from the original. Unfortunately the video does not show how to install the ordered part. Called 1aauto support line, which instructed me to cut wires in order to install to new part. They were very helpful but the video should be changed to reflect the part. Once installed part works great.
great parts, easy ordering, fast delivery
Gayle
August 28, 2017
This was my second order. Both times I was 100% satisfied with the ordering process, delivery of parts, and the parts work perfectly fine on my vehicle.
Blower motor resistor
W
September 29, 2017
Excellent product fixed what was wrong in my vehicle and the video that was with the product on your site helped explained how to install it
AWESOME web site
Joseph
October 27, 2017
Everything that I have bought from A1 Auto is working fine. I will; buy all my auto parts from this web site.
Module
Curt
November 13, 2017
Su per parts great fit and speedie mail. Will check with you first
Blower Motor Control
James
February 12, 2018
The blower motor control works great. The installation videos were right on and easy to follow. Very happy and warm.
Patricia
February 18, 2018
The blower module worked great. Installing it was a easy job and the price was good
Awesome company
K
February 24, 2018
We are a business and have been buying parts from A1. We have yet to th ave any kind of problem with any of the parts. They shipped them very quickly too. I recommend to anyone.
Great to work with. Quick delivery. Easy to install
W
May 15, 2018
Easy to order. Quick delivery and easy to install.
Satisfied with part
Z
June 28, 2018
Came in when was suppose to and works great will definitely be ordering parts from this site in the future and will recommend it to my family and friends.
Blower replacement
Michael
July 15, 2018
Was happen to receive blower module replacement part was exactly what they said it would be to fix my vehicle was easy and fixed my problem with blower for air conditioner to work properly again very happy with correct part and fast delivery thank you
Saved a bundle on easy AC fan fix
T
August 13, 2018
Thank you for the informative video and great price for the fan resistor module. I had no prior knowledge and was able to make the repair in about an hour.
T
September 10, 2018
Perfect fit and works for 3wks in Southwest Fl working 24/7 thanks to everyone. Simple easy shipping and most of all best price
Easy and no surprises
R
September 15, 2018
Good price, quality product, shipping and tracking good,
Phone number if I have any questions right on web pagelove it
Blower motor
Wes
October 5, 2018
It arrived in a timely manner and installed as advertised but it does not come on right away it takes about two blocks or so before coming on. I don't think this is the way it should work. But it does work.
Finally!
Candice
October 8, 2018
Exactly what I was looking for! Installation was super fast and easy. Fast shipping to Canada as well. My Envoy, which has automatic climate control, finally has a working blower again.
worked perfectly
Robert
November 2, 2018
IInstall took about 15 minutes thanks to the video from 1A. Parts works and fit as it should.
1AHBR00100-Blower Motor Module on GMC Envoy
L
November 18, 2018
I purchase the product from 1A AUTO. Substantially, than the national auto parts stores. I reviewed some instructions on 1A Auto and You Tube. The installation was simple and as expected. The results are great! Nice to have heat up here in the Northeast.
blower motor module
Anthony
December 13, 2018
i will give 1a auto a four out of five star rating, i have been buying parts here for awhile,always got good pricing,and quick shipping, this time with the blower module it was late, but it could of been a number of reasons, hey one order out of a few is not bad,thanks 1a auto HAPPY HOLIDAYS
blower motor module for Yukon XL 1500
Ashley
December 17, 2018
Works perfectly! I have my heat back! Very easy to install. If your heat wont shut off and you have to pull the fuse to make it shut off this part is exactly what you need!
Great part remplacement
D
March 25, 2019
This was a direct replacement part and worked perfectly in my 2005 Silverado LT
Impressive
H
April 21, 2019
I had a problem with my part and I left a comment online about it. Within a couple days they called me to follow up. They offered to replace or refund me. I was impressed that they would call so promptly and make sure I was happy. It seems that no one really takes the extra step like 1A Auto did with me.
Oem fit
Christopher
April 21, 2019
Clunk fixed, direct replacement
Blower motor module
Roger
June 9, 2019
Perfect 5 pin fit and size was perfect match. Wiring just like part it was replacing.. came quickly and happy when it came.
Satisfied customer
K
June 23, 2019
Very efficient n quality of service was excellent arrived on time very pleased with service recommend more people use your services tks
Love this site
J
July 9, 2019
Not only are the YouTube videos helpful, the parts are exactly as described. Perfect fit everyime.
Good deal
jeffery
July 19, 2019
Good parts good price very fast delivery what more could you ask for
Great Service
E
July 30, 2019
Great Service, Great Products, my new Go-to Company for auto parts
A++
Alexis
January 1, 2020
great product fast shipping
dezi
March 22, 2020
Good as the original
Video + technical support made the difference
S
May 1, 2020
Product arrived and had easy to understand instructions, complemented by the video. But replacement part had slightly different terminals than OE. Customer service helped by referring my case to technical support who reviewed my pictures and sent modified instructions and even marked my pics with the correct sequence for the terminals. Great job! The part ran as advertised and I'm back in business with the main blower giving us air again.
Upgraded blower motor module
Jonathan
September 11, 2020
This is the new upgraded style blower Motor module. This is a must have to truly repair your fix
Blower motor/ original
R
September 11, 2020
The part was the exact match to what I wanted, what would fit with existing wiring and works beautifully!
Just a plug and play connect that made the process so easy!
Fan resister
Scott
September 26, 2020
Part arrived as stated, Easy install, worked fine no issues
Great service
R
December 13, 2020
This part arrived quickly and worked as described. The harness was slightly different than my factory connector but had the additional needed leads for me to connect.
Just what I needed
Jordan
December 27, 2020
Very easy install, works great but its a little slow when I am changing speeds from high to low (just takes a second to catch up) but thats not a problem in my opinion. After my blower was stuck on even when I left the key off, I did a little research and 1A auto had the perfect part for a reasonable price.
ENVOY BLOWER MOTOR FAILURE
GERALD
April 16, 2021
GREAT CUSTOMER SERVICE. PROVIDED THE CORRECT PART TO FIX MY TRUCK'S INOPERATIVE HEATING/COOLING SYSTEM.
Good parts
Delia
May 31, 2021
Pleased with the part I purchased. Delivery was delayed
an extra day but the order process was easy and the
part was of good quality. Will purchase from 1aauto again !
Austin
August 20, 2021
Starting messing up a week after I purchased it. Only would work every now and again.
Blower motor module
Todd
November 2, 2021
Fit perfect, fast delivery, awsome price.
roberto
July 1, 2022
Is working great won't know how long will it last we'll see if the quality is there
Michael
July 5, 2022
Works fantastic no burn outs
Michael
July 26, 2022
Works better than ever
Blower relay
Stuart
March 9, 2023
Well it worked ... could not get the part at my local shops but 1A had it... not sure the blower speeds are the same as befor.. only draw back.
John
September 29, 2023
Works great. Thank you.
Blower module
Ricardo
December 23, 2023
The module looked a little different than the original, but worked great!
Great replacement
James
March 10, 2024
Works great, motor runs a few seconds after shutting off. May be a new feature with replacement module.
Only lasted a few months
David
May 6, 2024
Purchased this part in 10/23 It has worked fine up until now. With a 1-year warranty I have not been able to exchange it as of yet.
Blower motor resistor
Scott
May 17, 2024
Very good quality, it fixed my issues. Highly recommend
Blower Motor Module 2007 Trailblazer
Adam
June 3, 2024
It's working great so far. It wasn't a direct replacement, so wires had to be cut and spliced, which caused some confusion at first, but thankfully the website had a video which showed exactly how it should be done and it is working great.
FIXED BLOWER
Wayne
December 3, 2024
Worked like a charm.
Customer Q&A
What do I do with the extra wires? Factory harness has 3 wires.July 17, 2017
Rich K
10
I put black electrical tape over the ends.
July 17, 2017
TERRY W
10
I don't remember. I just remember that when I got it out,it was easy wire up and reinstall.
July 18, 2017
James W
10
Sorry, I don't remember.
July 18, 2017
Richard S
Why is thereno air coming out of vents on front panel drive and passenger side? Defrost and rear work.July 23, 2017
Sondra W
10
The blower modual has just gone bad
July 23, 2017
Davin J
10
This could be a blower motor module, or it could be the vent door is closed.
July 24, 2017
Alex P
Are the pictures generic?? Cause the module in the video is different than the one in the video??January 8, 2020
Navi N
10
I havent seen the video. But the one in the picture is what you get. Was an exact fit for my 04 Escalade esv
January 8, 2020
Scott H
10
The part shown on the site will be the part that is received. It is possible at the time the video was made there was another vendor whos part we were using. Please do not hesitate to contact us with any further questions.
January 8, 2020
Emma F
10
I bought this one and it looks like the picture, not the video. I think the video is for general how to, but it might be the analog blower control. Mine works well, better than one on Amazon that did not work. Once in a blue moon at 75% or so, it will drop out for about 2 seconds, but always comes right back on. I would recommend this.
January 10, 2020
J E
Will this work for the rear blower?April 23, 2021
Kirk K
10
I don't know. Mine only connected to the main blower up front.
April 24, 2021
P A
10
This module if for the front blower motor.
April 26, 2021
M N
Customer service
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