★★★★★
January 27, 2026
Great replacement
Perfect fit
Replaces
About TRQ:
TRQ is a trusted brand dedicated to making every repair a success story by combining premium parts with easy installation. Each TRQ part is engineered by a team of automotive experts to meet or exceed OEM standards, delivering enhanced performance and maximum longevity. With rigorous in-house testing, the brand ensures superior fit and function across every product line. TRQ also provides customers with best-in-class, step-by-step installation videos—so you can complete repairs with confidence, whether you're a first-time DIYer or an industry professional.
Returns: Parts with electrical components cannot be returned once installed.
Left Hand Drive:
All of our auto parts are intended for Left Hand Drive USDM vehicles. If your vehicle is Right Hand Drive, please ensure the part is correct for your specific vehicle.
Attention California Customers:
WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
This part fits 9 vehicles spanning 2002-2009.
| Year | Make | Model | Description |
|---|---|---|---|
| 2004-2007 | Buick | Rainier | Buick Rainier Front HVAC Blower Motor Assembly TRQ HMA84774 |
| 2002-2009 | Chevrolet | Trailblazer | Chevrolet Trailblazer Front HVAC Blower Motor Assembly TRQ HMA84774 |
| 2002-2006 | Chevrolet | Trailblazer EXT | Chevrolet Trailblazer EXT Front HVAC Blower Motor Assembly TRQ HMA84774 |
| 2002-2009 | GMC | Envoy | GMC Envoy Front HVAC Blower Motor Assembly TRQ HMA84774 |
| 2002-2006 | GMC | Envoy XL | GMC Envoy XL Front HVAC Blower Motor Assembly TRQ HMA84774 |
| 2004-2005 | GMC | Envoy XUV | GMC Envoy XUV Front HVAC Blower Motor Assembly TRQ HMA84774 |
| 2003-2008 | Isuzu | Ascender | Isuzu Ascender Front HVAC Blower Motor Assembly TRQ HMA84774 |
| 2002-2004 | Oldsmobile | Bravada | Olds Bravada Front HVAC Blower Motor Assembly TRQ HMA84774 |
| 2005-2009 | Saab | 9-7X | Saab 9-7X Front HVAC Blower Motor Assembly TRQ HMA84774 |
| Brand Label | Part Number |
|---|---|
| Partslink Numbering System | GM3126125 |
| Buick | 89018747 |
| Oldsmobile | 89018747 |
| Chevrolet | 89018747 |
| GMC | 89018747 |
| Hollander | 615-00637 |
| Hollander | 615-00690 |
| TYC | 700231 |
This item may be interchangeable with parts from other brands with the above part numbers. This information is provided only for reference and does not guarantee that the item you are purchasing is identical to parts with part numbers from the brands listed above. To confirm that this item fits your vehicle, use the above "Check Vehicle Fit" option.
Lifetime Warranty
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.
Returns: Parts with electrical components cannot be returned once installed.
FREE Shipping is standard on orders shipped to the lower 48 States (Contiguous United States). Standard shipping charges apply to Hawaii and Alaska.
Shipping is not available to a P.O. Box, APO/FPO/DPO addresses, US Territories, or Canada for this item.
Expedited is available on checkout to the United States, excluding Alaska, Hawaii.
Final shipping costs are available at checkout.
Created on:
Tools used
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.
Perfect fit
This blower motor is very quiet. I was worried about buying this. The original housing has a hose into the blower motor used for cooling. This blower takes care of that issue. They added a duct to the back of the housing that goes were the hose would of been. Wish they had mentioned it in the description. I was hesitant to buy it for this reason. This company has the products, prices, videos & customer service. Truly a great company. Bought many products from them with no issues at all.
Easy to order, delivery was quick, part fit, no issues. I have used in the past and will continue to use 1A for parts.
I do not have a photo but it was a perfect fit for my 05Chevy Trailblazer EXT. installation was quick and easy. 20 mins tops!
Blower motor was a perfect fit and excellent replacement for the oem blower that lasted 21 years in a Chevy Trailblazer.
Third fan motor in a 2003 Trailblazer Car came complete with a mouse It likes the small hole into the fan motor I am surprised that it has been in there when I turn on the fan! This is a different fan/motor and I think the mouse is gone: Good price and great service
Prior to replacing the blower motor, the only way to get it to run was to lower the glove box door all the way and whack the motor with a plastic ice scraper LOL!! Easy replacement and now no more whacking the motor!!!
It fit perfectly runs nice and quiet it takes about 30ms to install thanks
This part was easy to install and fit perfectly, like other things I have gotten the parts are cheaper than the auto stores and fit just fine. Thank you for help
A while back the blower resistor went out on my dad's 2005 chevy trailblazer when I had gone through to test the resistor I had also noticed that the blower motor was falling apart. So I ordered the blower motor from 1AAuto and have not had any complaints.
HMA84774
There could be multiple reasons why you're having this particular problem. We suggest taking your vehicle to a nearby reputable shop to identify the cause. Once you know the cause, we'll be happy to see if we carry the parts and how-to videos needed for your repair.
I thought it was the resistor but I had a garage try to figure it out and he said it was the motor. I think you should try a different motor and I think that should solve your problem.
