---
product_id: 206855854
title: "15-81931 (84178783) Heating and Air Conditioning Blower Control Module"
brand: "gm genuine parts"
price: "$273"
currency: NZD
in_stock: true
reviews_count: 11
category: "Gm Genuine Parts"
url: https://www.desertcart.nz/products/206855854-15-81931-84178783-heating-and-air-conditioning-blower-control-module
store_origin: NZ
region: New Zealand
---

# Precision HVAC Blower Speed Control No Programming Needed, Easy Install GM OE Spec Fit & Function 15-81931 (84178783) Heating and Air Conditioning Blower Control Module

**Brand:** gm genuine parts
**Price:** $273
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay cool and in control with GM Genuine Parts!

## Quick Answers

- **What is this?** 15-81931 (84178783) Heating and Air Conditioning Blower Control Module by gm genuine parts
- **How much does it cost?** $273 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/206855854-15-81931-84178783-heating-and-air-conditioning-blower-control-module)

## Best For

- gm genuine parts enthusiasts

## Why This Product

- Trusted gm genuine parts brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durability You Can Trust:** Built to last with genuine GM quality, ensuring long-term reliability under all conditions.
- • **Plug-and-Play Installation:** No programming required—get back on the road faster with a hassle-free swap.
- • **Seamless GM OE Compatibility:** Engineered to GM’s exact specifications for flawless fit and reliable performance.
- • **Smart Microprocessor Control:** Modulates HVAC blower speed for optimal climate comfort every drive.
- • **Upgrade Your Ride’s Climate Game:** Restore perfect airflow control and avoid costly repairs with this top-rated module.

## Overview

The GM Genuine Parts 15-81931 Blower Control Module is a direct OE replacement designed to precisely regulate your vehicle’s HVAC blower speed. Manufactured to GM specifications, it guarantees perfect fit, reliable performance, and easy installation with no programming required. Trusted by thousands, this durable module restores your climate control system to factory standards, ensuring comfort and convenience on every drive.

## Description

ACDelco GM Original Equipment HVAC Blower Motor Control Modules are microprocessor computers that modulate HVAC blower speed. The control module receives input from the HVAC control module and is a GM-recommended replacement for your vehicle's original co

Review: ALL GOOD - This heating and air conditioning blower control module works great. It fits good, and the quality is also good. This GM Genuine Part is ALL GOOD.
Review: Love It. Easy and works great. Buy AC Delco - I put it in my 2007 2007 Yukon Denali after the fan speed stopped responding and my blower motor kept running while the car is turned off. Putting in was a piece of cake and followed a YouTube channel. There are two types of it. So make sure you open what you have and see how many pins and buy the one that matches. I am not in any way a mechanic and an average person likely knows more about cars than me. So if I can do it, so can you. AC Delco is the best brand you can get for GMC. Do not go cheap.

## Features

- GM-recommended replacement part for your GM vehicle's original factory component
- Offering the quality, reliability, and durability of GM OE; No Programming Required
- Manufactured to GM OE specification for fit, form, and function

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0792NR4DF |
| Best Sellers Rank | #131,455 in Automotive ( See Top 100 in Automotive ) #198 in Automotive Blower Motors |
| Brand | GM GENUINE PARTS |
| Customer Reviews | 4.6 4.6 out of 5 stars (147) |
| Date First Available | January 16, 2018 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 5.6 ounces |
| Item model number | 15-81931 |
| Manufacturer | ACDelco |
| Manufacturer Part Number | 84178783 |
| OEM Part Number | 84178783 |
| Product Dimensions | 7 x 7 x 7 inches |

## Images

![15-81931 (84178783) Heating and Air Conditioning Blower Control Module - Image 1](https://m.media-amazon.com/images/I/71XMnvdkE8L.jpg)

## Questions & Answers

**Q: How does my vehicle’s AC system work?**
A: The AC compressor pressurizes refrigerant gas, which moves to the condenser. The gas releases heat, condensing into a high-pressure liquid. After cooling, the liquid passes over evaporator coils to cool the air as it is blown through the vents.

**Q: What are the signs the system needs service?**
A: Common indicators of an air conditioning system in need of service include warm and/or weak airflow through the vents, frequent on/off cycling of the system and a strange or musty odor.

**Q: Is the puddle of water under my car a sign of AC problems?**
A: Not necessarily. Condensation typically builds up on the AC evaporator and the water is drained at the bottom of the vehicle. That’s normal, but a larger puddle combined with reduced AC performance could indicate a problem.

**Q: Does low refrigerant mean there’s a leak in the system?**
A: In most cases the answer is yes. AC systems in older cars will experience refrigerant leakage over time, but a later-model vehicle that needs continual refrigerant recharging typically indicates a leak.

**Q: Can a new cabin air filter improve AC performance?**
A: Yes. A very dirty or clogged cabin air filter can reduce the airflow of the AC system, reducing its cooling efficiency and making the system work harder than normal. Periodic cabin filter replacements help the AC system keep its cool.

## Customer Reviews

### ⭐⭐⭐⭐⭐ ALL GOOD
*by M***R on October 19, 2025*

This heating and air conditioning blower control module works great. It fits good, and the quality is also good. This GM Genuine Part is ALL GOOD.

### ⭐⭐⭐⭐⭐ Love It. Easy and works great. Buy AC Delco
*by A***N on June 4, 2025*

I put it in my 2007 2007 Yukon Denali after the fan speed stopped responding and my blower motor kept running while the car is turned off. Putting in was a piece of cake and followed a YouTube channel. There are two types of it. So make sure you open what you have and see how many pins and buy the one that matches. I am not in any way a mechanic and an average person likely knows more about cars than me. So if I can do it, so can you. AC Delco is the best brand you can get for GMC. Do not go cheap.

### ⭐⭐⭐⭐⭐ Fixed the GMC fan
*by J***. on January 18, 2026*

Fixed a GMC sierra a/c fan that kept cutting on and off. Worked as intended.

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**Shop now:** [https://www.desertcart.nz/products/206855854-15-81931-84178783-heating-and-air-conditioning-blower-control-module](https://www.desertcart.nz/products/206855854-15-81931-84178783-heating-and-air-conditioning-blower-control-module)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-17*