Why do brakes need to be replaced in the first place?

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.

What’s the squealing sound I hear when braking?

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.

What if it’s more of a grinding sound?

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.

Why do the brakes seem to pulsate when stopping?

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.

What about vibrations or shaking in the steering wheel?

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.

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ACDelco GM Original Equipment 179-1266 Power Brake Booster Vacuum Check Valve Kit with Check Valve and Grommet

Product ID: 269725974

Details

Brand
GM GENUINE
Exterior finish
Machined
Inlet connection size
0.54 Inches
Item dimensions L x W x H
8.9 x 5.6 x
Material
Plastic

🔧GM OEM precision fit

🚗Vehicle-specific design

🛡️Durable, reliable build

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1902257₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Keep your brakes sharp with GM precision – don’t settle for less!

TOP RATED RELIABILITY - 4.6-star rating from 500+ users proves consistent customer satisfaction.
PERFECT FIT FOR YOUR GM - Vehicle-specific design ensures seamless installation and optimal operation.
DURABILITY YOU CAN TRUST - Crafted for long-lasting performance under demanding driving conditions.
ONE WAY VACUUM PROTECTION - Prevents air entry to maintain brake booster vacuum integrity and safety.
GM RECOMMENDED OEM QUALITY - Engineered to match original factory specs for flawless fit and function.

The ACDelco GM Original Equipment 179-1266 Power Brake Booster Vacuum Check Valve Kit is a GM-recommended replacement part designed to maintain vacuum integrity in your vehicle’s brake system. Manufactured to exact GM OEM specifications, it guarantees a perfect fit, reliable one-way valve function, and durable performance tailored specifically for GM vehicles.

Specifications

ASIN	B000C9H8AY
Best Sellers Rank	#61,398 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Air Check Valves
Brand Name	GM GENUINE PARTS
Connector Type	Compression
Customer Reviews	4.6 4.6 out of 5 stars (539)
Exterior Finish	Machined
Global Trade Identification Number	00036666449563
Included Components	Check Valve Kit
Inlet Connection Size	0.54 Inches
Inlet Connection Type	Male NPT
Item Dimensions	8.9 x 5.6 x 3.8 centimeters
Item Type Name	Check Valve Kit
Item Weight	5 g
Manufacturer	ACDelco
Manufacturer Part Number	179-1266
Material Type	Plastic
Model Number	179-1266
Number of Pieces	2
Number of Ports	2
Outlet Connection Size	0.54 Inches
Outlet Connection Type	Compression
Set Name	ACDelco GM Original Equipment Power Brake Booster Check Valve Kit (Check Valve, Grommet)
Size	2.2 inches x 3.5 inches x 1.5 inches
Smart Home Compatibility	Not Smart Home Compatible
Specification Met	GM
Thread Size	2.2 pulgadas
Thread Type	compression
UPC	036666449563
Unit Count	1 Count
Valve Type	Check Valve

Reviews

7**A

Works well so far, however it came as white, the picture when buying shows it as black

28.06.2024

C**Y

Slightly larger than the original but it worked out just fine. Got it for my 05’ Chevy Silverado 1500

30.11.2025

J**U

Excelente

4.06.2025

L**H

Works like a champ. Perfect fit, easy to install

30.04.2025

F**O

Se ajustó a la perfección en Pontiac Grand Am Gt 2002 y resolvió problema de fuga de vacío. Es de color blanco, no negro como en la fotografía.

23.09.2024

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