How to properly bench bleed a Brake Master Cylinder before installation on GMC Safari?

Draining air from the Brake Master Cylinder through bench bleeding saves time during the brake hydraulic system bleeding process. Set the master cylinder in a vise with slight tilt from the front and connect the ports to the vacuum source. Progressively push the primary Piston 25 mm as air escapes by using a round tool on the cylinder reservoir filled with new brake fluid. Refit the master cylinder into the vise with an opposite tilt and restore the same Piston stroke twice. Fill the reservoir with fluid and put the master cylinder into the vise with an even base. Take the outlet port plugs loose one by one and push the Piston toward the bore to remove trapped air. Seal the plug again before letting the Piston return naturally because air can enter the cylinder if left open. After filling the reservoir with fresh fluid put the master cylinder in place and continue the simple brake bleeding procedures.

OEM GMC Safari Brake Master Cylinder

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10 Brake Master Cylinders found

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GMC Safari Master Cylinder
Part Number: 18029964
$194.99 MSRP: $360.76
You Save: $165.77 (46%)
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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:
- 1990-1994 GMC Safari | Base, GT, SLE, SLT, SLX | 4 Cyl 2.5 L GAS, 6 Cyl 4.3 L GAS
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GMC Safari Master Cylinder
Part Number: 18029963
$173.93 MSRP: $321.80
You Save: $147.87 (46%)
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Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 18015414
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1995, 1990 GMC Safari | Base, SL, SLE, SLT, SLX | 4 Cyl 2.5 L GAS, 6 Cyl 4.3 L GAS
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GMC Safari Master Cylinder
Part Number: 18047529
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:
- 2003 GMC Safari | Base, SLE, SLT | 6 Cyl 4.3 L GAS
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GMC Safari Overhaul Kit
Part Number: 18011029
Product Specifications
- Other Name: Cylinder Kit, Brake Master; Repair Kit, Brake Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1995, 1990 GMC Safari | Base, SL, SLE, SLT, SLX | 4 Cyl 2.5 L GAS, 6 Cyl 4.3 L GAS
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GMC Safari Master Cylinder
Part Number: 19209257
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 18048897
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2005 GMC Safari | Base, SLE, SLT | 6 Cyl 4.3 L GAS
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GMC Safari Master Cylinder
Part Number: 18047594
Product Specifications
- Other Name: Cylinder, Brake Master Cylinder; Brake Master Cylinder
- Replaces: 18029952
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2002 GMC Safari | Base, SL, SLE, SLT, SLX | 6 Cyl 4.3 L GAS
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GMC Safari Overhaul Kit
Part Number: 18047531
Product Specifications
- Other Name: Cylinder Kit; Cylinder Kit, Brake Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2005 GMC Safari | Base, SLE, SLT | 6 Cyl 4.3 L GAS
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GMC Safari Overhaul Kit
Part Number: 18023274
Product Specifications
- Other Name: Cylinder Kit, Brake Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2002 GMC Safari | Base, SL, SLE, SLT, SLX | 6 Cyl 4.3 L GAS
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GMC Safari 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:
- 1985-1989 GMC Safari | Base, SL, SLE, SLT, SLX | 4 Cyl 2.5 L GAS, 6 Cyl 4.3 L GAS
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GMC Safari 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:
- 1985-1994 GMC Safari | Base, GT, SL, SLE, SLT, SLX | 4 Cyl 2.5 L GAS, 6 Cyl 4.3 L GAS

GMC Safari Brake Master Cylinder

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GMC Safari Brake Master Cylinder Parts Questions & Experts Answers

Master Cylinder
18047594
Q: How to properly bench bleed a Brake Master Cylinder before installation on GMC Safari?
A: Draining air from the Brake Master Cylinder through bench bleeding saves time during the brake hydraulic system bleeding process. Set the master cylinder in a vise with slight tilt from the front and connect the ports to the vacuum source. Progressively push the primary Piston 25 mm as air escapes by using a round tool on the cylinder reservoir filled with new brake fluid. Refit the master cylinder into the vise with an opposite tilt and restore the same Piston stroke twice. Fill the reservoir with fluid and put the master cylinder into the vise with an even base. Take the outlet port plugs loose one by one and push the Piston toward the bore to remove trapped air. Seal the plug again before letting the Piston return naturally because air can enter the cylinder if left open. After filling the reservoir with fresh fluid put the master cylinder in place and continue the simple brake bleeding procedures.

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