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How to Replace Heater Blower Motor 2002-09 Chevy Trailblazer
Created on:
Tools used
Socket Extensions
7mm Socket
Ratchet
1. Remove the AC Fan Blower Motor
Under the passenger side dash, unbolt the plastic cover using your 7 mm socket and ratchet.
Unclip the wiring from the plastic panel.
Open the glove compartment and unhook it to let it drop down.
Use your socket, ratchet and extension to unbolt the blower motor.
Unplug the wiring harness from the blower motor and pull the blower motor down and out.
2. Install the blower motor
Insert the blower motor up into place.
Plug in the wiring harness.
Bolt into place with your 7 mm socket and ratchet.
Rehook your glove box back in and close it.
Clip the wiring brackets back to the plastic cover.
Bolt the plastic cover back on with your 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 20+ year's experience, restoring and repairing cars and trucks like this to show you the correct way to install parts from 1AAuto.com. The rights parts installed correctly. That's going to save you time and money. Thank you and enjoy the video.
In this video, we're going to show you how to remove and reinstall your heater and A/C blower motor on this 2004 Trailblazer, same as most Trailblazers, Envoys, Rainiers, and Olds Silhouette. Tools you'll need 7 mm socket and a 7/32 socket with a ratchet and extension.
First you want to remove two 7 mm 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. You take this one; you can actually pry down on this little tab and then pull it off. Then this comes out. Open up your glove compartment. Okay, this little hook just pulls up and you can move your glove box down. You'll want a 7/32 with an extension and a ratchet and you're just going to reach up underneath. And we'll fast forward as I remove that bolt.
This one over here you can see. Then there's actually one, the third one is down in behind, so you're going to want to reach up from underneath. Let's see here, where is it at? Okay, it's right there. Okay, now once it's out, that's usually the easiest time to unplug your lead here, which to unplug it you want to press right there. The lead comes off and there's your motor out. Okay, now we're going to, just going to take the lead out and just pull this plastic casing out. So to reinstall, open our glove compartment back up. Basically what I'm doing, taking my motor, this little tube coming down here, that's where your rubber hose hooks on to. I'm going to put my motor up in, make sure that no wires or anything get up in there, getting caught. I'm just reaching in behind. There's my tube, push that up on, I'm holding the motor up on. I have to get this plastic cover up in there without getting any wires. The easiest way to do this, alls you're seeing is the glove compartment. I'm looking up under here and just moving all the wires out of the way, then I put the plastic cover up and in. Kind of rotate it.
Now I can start on this first bolt here that's holding it on. I'll take my extension and put my second bolt into it. Looking right through here, I can barely see this hole. Start my second bolt. Now I'm going to put my third one up in there. Okay, now I'm going to speed it up as I kind of tighten them by hand and then start tightening one with the wrench and then I'll slow it back down to connect the lead. They don't have to be extremely tight. Just make sure all my leads and everything are okay. I'm going to bring this, my lead to the motor through. It does clip up into a clip. You see my hand right in here; I'm just pushing it into its little plastic clip where it stays.
And I'll hit the fast forward button again as I tighten up the last two bolts and then close the glove compartment. Okay, 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 and 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 888-844-3393. We're the company that's here for you on the Internet and in person.
HCA41505
In Stock
Product Reviews
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5.00/ 5.020
20 reviews
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Blower motor
Amilcare
January 21, 2017
Good product. Matched perfect, and fit perfect. I got free shipping.
wendell
January 23, 2017
parts came in quickly and works greatwould recamend a1 auto to friends
Blower Motor Resistor
Robert
March 2, 2017
I was very pleased with the whole process, from ordering it from your website to it arriving very quick. Oh, and the great price. This was a very quick and easy fix to install this resistor. Will definitely use 1A Auto again for needed Auto parts.
Easy diy
J
November 12, 2017
Great price on the part. The video provided by 1a on you tube made installation easy. Glad I saved a few bucks by doing it myself.
Blower resistor
D
November 17, 2017
New resistor works great. Thankyou very much online parts lookup waa easy and parts got to house 5 days graet job. Again thank very much
Auto Part
D
July 30, 2018
I called to check for the propet part. The gal was very helpful. I then ordered the part on the web site. Great service Dan Sugden
Great as usual
S
October 22, 2018
This was the exact part that I needed. Even though I couldn't find the part number on the old part. I just trusted that this would fit because this website said it would and they have never steered me wrong yet. I love the videos that they have on this website and I tell all of my friends. This is my go-to place for auto parts.
Great product
Eduardo
October 23, 2018
I receive the part installed it and I'm very happy and satisfied
1aauto has it figured out
B
January 30, 2019
Part came in earlier then they said which was great part works awsome looks good would most defiantly recommend going threw them for all your auto part needs
Works Great !
U
February 12, 2019
Installed in a 03 Trailblazer, fan would only work on 4 and 5. easy install.
Very Satisfied!
T
July 23, 2019
The process of looking for and purchasing the product I needed was very quick and easy. Their prices are less than the auto parts stores and the product I received was of good quality so I will definitely get all my auto parts from 1aauto.
It works!
michael
September 18, 2019
The resistor was going bad and I was losing speeds on my AC. Replaced with this part and all is well. Feels like the blower moves more air then before I was losing speeds as well.
Fantastic and fixed
Randy
January 6, 2020
The parts took a little while to get and tracking was a little messy getting updated.. But, it worked great, and Youtube showed easily how to replace the parts... Overall I am real pleased.
The Correct Part at a Great Price
M
August 26, 2020
I had ordered this part from someone else twice and was sent the wrong part twice, should of ordered from 1aauto the first time..the 1aauto part was correct the first time at a great price and fast shipping... I learned my lesson thank you 1aauto
Exact replacement part at reasonable price
William
September 10, 2020
Replacement part exact size and fit as original. Less expensive than GM part and delivered in 5 days. The video of how-to was quite helpful as well.
Great price wonderful quality
J
June 29, 2021
Perfect fit. Very easy to install. Worked better than the original. Would definitely buy from 1A again
Brian
September 22, 2022
Exact fit for my suv at a good price. Shipped very quickly too.
Blower motor resistor
Mark
December 13, 2022
It was easy to install the you tube video helped a lot everything works perfect Thanks
Lee
August 11, 2023
Perfect replacement for the oem resistor. Bought a new blower motor as well since that was making strange sounds when switched on "high."
Quick Fix
Thomas
August 18, 2024
Exactly what I needed. Fixed the ac and fan problem. very reasonable pricing also.
Customer Q&A
How do I know if I have automatic temperature control or Manuel?December 31, 2019
Keila F
10
Keila if you have a slider tab or knob with blue and red lines around it you have manual. If you have a digital read out of temp you probably have automatic
December 31, 2019
Tara B
10
You will have a auto button on the control if its automatic
December 31, 2019
Scott K
10
Hello and thank you for your inquiry. We may be able to find out for you if you're able to provide your VIN number. Alternately, you can contact your dealer to double check as well. Thank you!
January 2, 2020
Katie L
How long is the wire that leads into the blower motor?June 29, 2021
Dustin M
10
I don't know the length of the lead, it's factory made but it's sufficient in length. I recommend changing out the blower motor if you're going to change out the resistor, because something caused the resistor to burn out. Also check the plugins on the resistor if they have been heated because of excessive current flow -- I also recommend changing out that connection piece -- more than likely you'll need to go to a wrecking yard and cut one out of another vehicle make sure the wire length is as long as you can get. My recommendations are based on experience trial and error
June 29, 2021
M B
10
Actual Measurements are not listed or available. Our parts are exact replacements for your vehicle's OEM parts. As long as your year, make, and model match up with our listing, these parts will directly fit and function like the originals.
June 29, 2021
Ricale A
10
If I recall correctly it's a good six to nine inches long
June 29, 2021
J U
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