---
product_id: 262915005
title: "GM Genuine Parts 178-0821 (20819294) Power Brake Booster Assembly"
brand: "gm genuine parts"
price: "A$1789"
currency: AUD
in_stock: true
url: https://www.desertcart.com.au/products/262915005-gm-genuine-parts-178-0821-20819294-power-brake-booster-assembly
store_origin: AU
region: Australia
---

# Restores original brake power Precision GM OE fit Durable, factory-grade build GM Genuine Parts 178-0821 (20819294) Power Brake Booster Assembly

**Brand:** gm genuine parts
**Price:** A$1789
**Availability:** ✅ In Stock

## Summary

> 🚦 Upgrade your brake game with GM precision power!

## Quick Answers

- **What is this?** GM Genuine Parts 178-0821 (20819294) Power Brake Booster Assembly by gm genuine parts
- **How much does it cost?** A$1789 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/262915005-gm-genuine-parts-178-0821-20819294-power-brake-booster-assembly)

## 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

- • **Seamless GM OE Compatibility:** Engineered to match your GM vehicle’s original brake booster for flawless fit and function.
- • **Built to Last with GM Quality:** Crafted with premium materials ensuring long-lasting durability and reliability under all conditions.
- • **Optimized for Safety & Control:** Maintains the integrity of your vehicle’s braking system, giving you peace of mind behind the wheel.
- • **Direct Replacement, Zero Hassle:** GM-recommended part designed for easy installation, restoring your brake system to factory specs.
- • **Power-Boosted Braking Performance:** Amplifies pedal force to deliver enhanced stopping power and confidence on every drive.

## Overview

The GM Genuine Parts 178-0821 Power Brake Booster Assembly is a GM OE-spec replacement designed to restore and enhance your vehicle’s braking performance. Manufactured by ACDelco, it ensures perfect fit, durability, and reliable power boost to the master cylinder, delivering the trusted stopping power GM drivers expect.

## Description

ACDelco GM Original Equipment Power Brake Boosters connect the brake pedal apply system to the master cylinder, and are GM-recommended replacements for your vehicle's original components. The brake booster is a force multiplier that causes additional force to be applied to the master cylinder for additional braking power. These brake boosters have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

## Features

- Restores brake power and performance
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | ACDelco |
| Brand | ACDelco |
| Model | Brake Booster |
| Item Weight | 7.45 pounds |
| Product Dimensions | 15.88 x 13.25 x 12.88 inches |
| Item model number | 178-0821 |
| Exterior | Machined |
| Manufacturer Part Number | 178-0821 |
| OEM Part Number | 20819294 |

## Images

![GM Genuine Parts 178-0821 (20819294) Power Brake Booster Assembly - Image 1](https://m.media-amazon.com/images/I/31PaYo6ofXL.jpg)
![GM Genuine Parts 178-0821 (20819294) Power Brake Booster Assembly - Image 2](https://m.media-amazon.com/images/I/41SzDGSxetL.jpg)

## Questions & Answers

**Q: Why do brakes need to be replaced in the first place?**
A: Friction material on the brake pad contacts the rotors to slow the vehicle. In time, that material wears away and the pads must be replaced. Sometimes the rotors and calipers must also be replaced.

**Q: What’s the squealing sound I hear when braking?**
A: Over time, wear indicators in brake pads may contact the rotors’ surface when braking, resulting in a metallic squealing sound. Vehicles equipped with wear sensors may also provide an alert that minimum brake pad thickness has been reached.

**Q: What if it’s more of a grinding sound?**
A: If all the friction material has been worn away, the metal backing plate of the brake pad will be the material in contact with the rotor during braking. It causes a grinding sound and braking performance is often diminished.

**Q: Why do the brakes seem to pulsate when stopping?**
A: It may be due to worn brake pads, unevenly worn rotors or unevenly worn tires. Have the pulsation diagnosed as soon as possible to avoid the possibility of greater brake system wear or damage.

**Q: What about vibrations or shaking in the steering wheel?**
A: This is more serious than pulsation. If the brakes are very worn or the rotors are unevenly worn, there can be a significant vibration or shaking in the steering wheel when braking. It may mean brake service is needed immediately.

## Frequently Bought Together

- ACDelco GM Original Equipment 178-0821 Power Brake Booster Assembly
- General Motors 22872387 Power Brake Booster Gasket
- ACDelco Professional 18M2426 Brake Master Cylinder Assembly

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**Shop now:** [https://www.desertcart.com.au/products/262915005-gm-genuine-parts-178-0821-20819294-power-brake-booster-assembly](https://www.desertcart.com.au/products/262915005-gm-genuine-parts-178-0821-20819294-power-brake-booster-assembly)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-01-24*