How to replace the brake master cylinder (Vacuum Boost) on GMC C2500?

Before replacing the Brake Master Cylinder (Vacuum Boost), ensure the parking brake is on and the electrical wire at the Brake Fluid Level Sensor is disconnected. After this, disconnect the brake hoses and put caps on them to make sure there is no brake fluid leak or contamination. Unscrew the master cylinder mounting nuts, take out the master cylinder, and afterwards the master cylinder reservoir. First, put the master cylinder reservoir in place, and then bench bleed the master cylinder. Set the master cylinder in place, use the fastener notice as a reference to install the nuts, and tighten them to 36 n.m (27 lb ft). Remove the caps from the pipes, put the brake lines in place, and tighten them to 25 n.m (18 lb ft). Install the electrical connection on the Brake Fluid Level Sensor, bleed the brakes, and afterwards set the parking brake.

How should you bench bleed a brake master cylinder before installation on GMC C2500?

Bleed the Brake Master Cylinder off a workbench first to save time when completing the brake hydraulic bleeding process. Set the outlet ports in place first and rest the master cylinder in a vise with its front end pointed downward. Insert clean brake fluid into the reservoir. Stroke the primary Piston using a round-end tool 25 mm (1 inch) in length several times but keep in mind that the Piston will not move through its whole path due to air venting. Place the master cylinder in the vise and tilt its front end upward. Activate the primary Piston through 25 mm (1 inch) travel five times more. Put the master cylinder flat on the vise and unscrew outlet plugs while rotating through them one by one. Insert the Piston into the bore to drive out air which secures the plug(s) until you pull the Piston back to its normal position to seal off the system. Replenish the brake fluid reservoir using clean fluid and perform regular bleeding operations after installing the master cylinder.

OEM GMC C2500 Brake Master Cylinder

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6 Brake Master Cylinders found

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GMC C2500 Overhaul Kit Part Number: 18007935
Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder; Master Cylinder Repair Kit
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-1993 GMC C2500 | Sierra, Sierra SLE, Sierra SLX | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C2500 Master Cylinder Repair Kit Part Number: 25509843
Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder; Repair Kit, Brake Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984 GMC C2500 | Base, High Sierra, Sierra Classic | 6 Cyl 4.1 L GAS, 6 Cyl 4.8 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C2500 Master Cylinder Part Number: 18013440
Product Specifications
- Other Name: Master Cylinder Assembly Package; Brake Master Cylinder; Cylinder, Brake Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1990, 1985-1986 GMC C2500 | Base, High Sierra, Sierra, Sierra Classic, Sierra SLE, Sierra SLX | 6 Cyl 4.3 L GAS, 6 Cyl 4.8 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C2500 Overhaul Kit Part Number: 18012918
Product Specifications
- Other Name: Cylinder Kit, Brake Master; Master Cylinder Repair Kit; Cylinder Kit, Brake Master Cylinder; Repair Kit, Brake Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-2000, 1988-1990 GMC C2500 | Sierra, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C2500 Master Cylinder Part Number: 19209222
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 18029968, 18021275
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-2000 GMC C2500 | Sierra SL, Sierra SLE, Sierra SLT | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C2500 Master Cylinder Part Number: 18060087
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 18013978
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-1993 GMC C2500 | Sierra, Sierra SLE, Sierra SLX | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS

GMC C2500 Brake Master Cylinder

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The GMC C2500 Brake Master Cylinder is an essential criteria that defines the reliability as well as the performance of GMC C2500 series, which has always set a standard of heavy duty pickup trucks right from 1960. This particular Brake Master Cylinder does the job of converting the foot force exerted on it into hydraulic pressure with which control of the slave cylinders that actuate the calipers or drum brake is made effectively. It plays a very important role in the hydraulic force and pressure control in GMC C2500 during its operations as this increases on efficiency and safety. This Brake Master Cylinder fits models of GMC C2500 and is designed to cope with the load and performance requirements of a working vehicle and at the same time, it can be used for other types of driving. Since the brake system is one of the essential parts of any automobile, the GMC C2500 Brake Master Cylinder has striking features that distinguish it from other brands in the automobile market today. Moreover, it also has a capability to take the beating of big loads and difficult terrains strengthens it more. The structural design and the functions of the GMC C2500 Brake Master Cylinder give it a life, which defines it not only as an extraordinary component but as a system that offers reliability to the drivers of their GMC C2500. Taken in the general context, the GMC C2500 Brake Master Cylinder is an indicative of the company's drive to quality and reliable automotive products.

GMC C2500 Brake Master Cylinder Parts and Q&A

Overhaul Kit
18012918
Q: How to replace the brake master cylinder (Vacuum Boost) on GMC C2500?
A:
Before replacing the Brake Master Cylinder (Vacuum Boost), ensure the parking brake is on and the electrical wire at the Brake Fluid Level Sensor is disconnected. After this, disconnect the brake hoses and put caps on them to make sure there is no brake fluid leak or contamination. Unscrew the master cylinder mounting nuts, take out the master cylinder, and afterwards the master cylinder reservoir. First, put the master cylinder reservoir in place, and then bench bleed the master cylinder. Set the master cylinder in place, use the fastener notice as a reference to install the nuts, and tighten them to 36 n.m (27 lb ft). Remove the caps from the pipes, put the brake lines in place, and tighten them to 25 n.m (18 lb ft). Install the electrical connection on the Brake Fluid Level Sensor, bleed the brakes, and afterwards set the parking brake.
Master Cylinder
19209222
Q: How should you bench bleed a brake master cylinder before installation on GMC C2500?
A:
Bleed the Brake Master Cylinder off a workbench first to save time when completing the brake hydraulic bleeding process. Set the outlet ports in place first and rest the master cylinder in a vise with its front end pointed downward. Insert clean brake fluid into the reservoir. Stroke the primary Piston using a round-end tool 25 mm (1 inch) in length several times but keep in mind that the Piston will not move through its whole path due to air venting. Place the master cylinder in the vise and tilt its front end upward. Activate the primary Piston through 25 mm (1 inch) travel five times more. Put the master cylinder flat on the vise and unscrew outlet plugs while rotating through them one by one. Insert the Piston into the bore to drive out air which secures the plug(s) until you pull the Piston back to its normal position to seal off the system. Replenish the brake fluid reservoir using clean fluid and perform regular bleeding operations after installing the master cylinder.