★★★★★
September 10, 2025
It works like new
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.
Attention California Customers:
WARNING: This product can expose you to chemicals including Lead and Lead Compounds, which are 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 26 vehicles spanning 1988-1994.
| Year | Make | Model | Description |
|---|---|---|---|
| 1991-1993 | Buick | Roadmaster | Buick Roadmaster with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1993 | Cadillac | 60 Special | Cadillac 60 Special with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1993 | Cadillac | Fleetwood | Cadillac Fleetwood Rear Wheel Drive with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1992-1994 | Chevrolet | Blazer | Chevrolet Blazer 4 Wheel Drive with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1988-1994 | Chevrolet | C1500 Truck | Chevrolet C1500 Truck with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1988-1994 | Chevrolet | C2500 Truck | Chevrolet C2500 Truck with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1988-1994 | Chevrolet | C3500 Truck | Chevrolet C3500 Truck with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1988-1994 | Chevrolet | K1500 Truck | Chevrolet K1500 Truck with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1988-1994 | Chevrolet | K2500 Truck | Chevrolet K2500 Truck with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1988-1994 | Chevrolet | K3500 Truck | Chevrolet K3500 Truck with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1992-1994 | Chevrolet | Suburban C1500 | Chevrolet Suburban C1500 with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1992-1994 | Chevrolet | Suburban C2500 | Chevrolet Suburban C2500 with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1992-1994 | Chevrolet | Suburban K1500 | Chevrolet Suburban K1500 with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1992-1994 | Chevrolet | Suburban K2500 | Chevrolet Suburban K2500 with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1988-1994 | GMC | C1500 Truck | GMC C1500 Truck with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1988-1994 | GMC | C2500 Truck | GMC C2500 Truck with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1988-1994 | GMC | C3500 Truck | GMC C3500 Truck with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1988-1994 | GMC | K1500 Truck | GMC K1500 Truck with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1988-1994 | GMC | K2500 Truck | GMC K2500 Truck with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1988-1994 | GMC | K3500 Truck | GMC K3500 Truck with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1992-1994 | GMC | Suburban C1500 | GMC Suburban C1500 with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1992-1994 | GMC | Suburban C2500 | GMC Suburban C2500 with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1992-1994 | GMC | Suburban K1500 | GMC Suburban K1500 with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1992-1994 | GMC | Suburban K2500 | GMC Suburban K2500 with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1992-1994 | GMC | Yukon | GMC Yukon with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| 1991-1992 | Oldsmobile | Custom Cruiser | Olds Custom Cruiser with Automatic Climate Control HVAC Blend Door Actuator TRQ HCA40128 |
| Brand Label | Part Number |
|---|---|
| DIY Solutions | HVA02914 |
| Dorman - OE Solutions | 604-124 |
| General Motors | 89018368 |
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, Alaska and US Territories. Shipping is not available to Canada.
Expedited is available on checkout to the United States, excluding Alaska, Hawaii and US Territories as well as P.O. Boxes and APO/FPO/DPO addresses. Final shipping costs are available at checkout.
Created on:
Tools used
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In this video, we're going to be replacing the temperature door actuator on this '02 GMC Sierra. This is usually the problem when you turn your temperature control knob, and you don't get any warmer or cold air. You're either just getting warm or just cold or just one temperature. Tools you'll need are a 7mm socket and a 7/32s inch socket with an extension and a ratchet.
On the passenger side, there are four 7mm bolts to remove: one there and one in there. There's one up in that hole right there. I can't really film it. And then over here, closer to the gas pedal there is one right there. Once you remove those bolts, just reach in, kind of pull it down and out of the way.
The actuator is right down here. It's held in with two bolts, they're 7/32s. One of them is right over here. The other one's on the opposite side. It’s a little more difficult to get to. Kind of have to stuff the wrench in there. Kind of starts coming out, and you can disconnect your wrench and just use the socket. Okay.
So the actuator then comes down and out, and there's a little connector right here. Just push and disconnect. Very important when replacing one of these actuators. Make sure that you do not power the actuator up before it's installed.
So make sure your key is off, and you'll see that I actually install it before I plug it in. So install. Push it up and in, and get on the pin in there. I'm starting this bolt over here. Just use my socket. Okay and the final part is to put your cover back in place. You want to push it up in there.
You push it kind of against the firewall first. And I'm sorry about shaking around a little bit here, just trying to film with one hand and push it up in there with the other. Push the front of it up and in first and then make sure you have everything lined up. Okay.
As you could see here, these are the passenger side outlet holes. Make sure those are all lined up and then start your end bolt here, and then I'd recommend starting the ones over near the driver side. Once you have those lined up, then the other two middle ones go in pretty easily.
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.
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HCA40128
It works like new
So far so good, it is performing like it should so far.
Im not sure if this was exactly what I needed bc it had more prongs than old one but nonetheless it worked. Kinda hard to get to but worth it in the end. Great product, works as it should
This actuator for right in my 91 k2500. Unfortunately it wasn't the problem, but I'm happy to know that I have a new actuator. ??
It was super to order parts online and to speak with customer service on a recent purchase. She did excellent at taking care of my order. I appreciate the professionalism of your company.
This has a 5-pin connector.
Currently, we do not carry this part for your vehicle. We're always updating our inventory so please check back soon!
We are unable to diagnose the exact issue of what you are experiencing with your vehicle.
