How to service and repair the Brake Master Cylinder on Chevrolet Trailblazer?

Begin repairs on the Brake Master Cylinder by placing its mounting flange in a bench vise to locate the primary Piston at the back. Install correct fittings on master cylinder ports that match necessary flared-seam standards and enable hose connections. Place these fittings on master cylinder ports and join them with transparent hoses into the reservoir. Place delco supreme 11 gm brake fluid reference numbers 12377967 and 992667 or equivalent dot-3 brake fluid in the reservoir until it reaches halfway while completely immersing hose ends in a clean sealed fluid container. Depress the primary Piston into a cylinder 25 mm using a smooth blunt instrument and watch fluid flow from both ports. You will notice air exits the primary and secondary pistons during the process as pushing force grows stronger and depression distance shortens. Push and release the primary Piston again to know fluid flows out of ports without trapped air. Replace the transparent hoses in the reservoir. Put back the master cylinder reservoir parts and take off the fittings with hoses from the provider ports. Soften spills during removal with shop cloth before taking the master cylinder out of the vise.

OEM Chevrolet Trailblazer Brake Master Cylinder

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Chevrolet Trailblazer Master Cylinder Part Number: 15142479
$53.25 MSRP: $100.00
You Save: $46.75 (47%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2008 Chevrolet Trailblazer | Base, LS, LT, SS | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
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Chevrolet Trailblazer ABS Control Unit Part Number: 42790149
$776.47 MSRP: $1227.22
You Save: $450.75 (37%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Valve Kit, Electronic Brake Control; Cylinder, Brake Master Cylinder
- Replaced by: 42907267
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2023 Chevrolet Trailblazer | ACTIV, LS, LT, RS | 3 Cyl 1.2 L GAS, 3 Cyl 1.3 L GAS
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Chevrolet Trailblazer Modulator Valve Part Number: 42742904
$738.31 MSRP: $1330.28
You Save: $591.97 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Valve Kit, Electronic Brake Control; ABS Control Module; ABS Control Unit; Cylinder, Brake Master Cylinder
- Replaced by: 42769597
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2022 Chevrolet Trailblazer | ACTIV, L, LS, LT, RS | 3 Cyl 1.2 L GAS, 3 Cyl 1.3 L GAS
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Chevrolet Trailblazer Master Cylinder Part Number: 19417223
$163.38 MSRP: $293.06
You Save: $129.68 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cylinder, Brake Master Cylinder
- Replaces: 25828524, 84164395
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009 Chevrolet Trailblazer | LT, SS | 6 Cyl 4.2 L GAS, 8 Cyl 6.0 L GAS
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Chevrolet Trailblazer Master Cylinder Part Number: 19209266
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 18060788, 18044393
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2005 Chevrolet Trailblazer | LS, LT, LTZ, North Face | 6 Cyl 4.2 L GAS

Chevrolet Trailblazer Brake Master Cylinder

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Brake Master Cylinder used in Chevrolet Trailblazer cars is an imperative part of the braking system that translates the pressure exerted by the foot of car's driver into hydraulic pressure. This hydraulic pressure reaches the slave cylinders which in turn applies pressure on the brake thus providing he needed friction to halt the car. The braking system of Chevrolet Trailblazer usually involves use of dual circuit master cylinder since in case one of the circuits loses their efficiency the other one is able to provide sufficient power for the braking system. Chevrolet Trailblazer Brake Master Cylinders can either have a provision for an inbuilt reservoir or one which has a separate reservoir, although the ones with the external reservoirs are comparatively more frequent. The integral type is found to have one cap which is attached to it while the external type may consist of one or two threaded caps at times. In time though, these problems may develop in form of fluid leaks or internal system faults and hence require proper scrutiny and servicing for efficiency. This is due to the fact that Brake Master Cylinder plays an important role in the braking system of the Chevrolet Trailblazer, therefore, the design and functionality of this component must be well worked out.

Chevrolet Trailblazer Brake Master Cylinder Parts Questions & Experts Answers

Master Cylinder
19209266
Q: How to service and repair the Brake Master Cylinder on Chevrolet Trailblazer?
A:
Begin repairs on the Brake Master Cylinder by placing its mounting flange in a bench vise to locate the primary Piston at the back. Install correct fittings on master cylinder ports that match necessary flared-seam standards and enable hose connections. Place these fittings on master cylinder ports and join them with transparent hoses into the reservoir. Place delco supreme 11 gm brake fluid reference numbers 12377967 and 992667 or equivalent dot-3 brake fluid in the reservoir until it reaches halfway while completely immersing hose ends in a clean sealed fluid container. Depress the primary Piston into a cylinder 25 mm using a smooth blunt instrument and watch fluid flow from both ports. You will notice air exits the primary and secondary pistons during the process as pushing force grows stronger and depression distance shortens. Push and release the primary Piston again to know fluid flows out of ports without trapped air. Replace the transparent hoses in the reservoir. Put back the master cylinder reservoir parts and take off the fittings with hoses from the provider ports. Soften spills during removal with shop cloth before taking the master cylinder out of the vise.