What is the function and maintenance requirements of the hydraulic power brake booster on GMC Safari?

The hydraulic booster, introduced in 1993 and later models, replaces the vacuum-powered brake booster and utilizes hydraulic pressure from the power steering pump to enhance brake power. It is mounted between the firewall and the brake master cylinder. Normal operating parameters include a hissing noise during heavy braking and clunking or clicking noises when quickly releasing the brake pedal after hard braking. The hydraulic power brake booster requires no special maintenance but certain conditions must be met for proper functioning, such as a good condition drivebelt, correct power steering fluid level, kink-free pressure lines, leak-free booster unit, and an air bubble-free power steering system. Repair of the booster unit necessitates special tools, therefore, it is recommended to install a new or rebuilt unit if a problem arises. The removal process involves disconnecting the master cylinder, ABS control module, and isolation/dump valve, draining power steering fluid, disconnecting the power steering fluid reservoir supply hose and pressure lines, removing the driver's side knee bolster if necessary, disconnecting the pushrod from the brake pedal, and removing the booster unit from the firewall. Installation is the reverse of removal, including tightening the mounting nuts and hose fittings to specified torque, adding power steering fluid, checking for leaks, bleeding the power steering system, and testing the braking system before normal use.

Genuine GMC Safari Brake Booster

Brake Power Booster

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10 Brake Boosters found

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GMC Safari Power Brake Booster Assembly
Part Number: 18060105
$175.26 MSRP: $549.06
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Product Specifications
- Other Name: Booster Asm,Power Brake; Booster Assembly
- Replaces: 18015135
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993 GMC Safari | VAN SAFARI | 6 Cyl 4.3L
- 1990-1991 GMC Safari | VAN SAFARI | 6 Cyl 4.3L
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GMC Safari Power Brake Booster (Hydraulic)
Part Number: 15635043
Product Specifications
- Other Name: Booster,Power Brake(Hydraulic); Brake Booster
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1990-1993 GMC Safari | VAN SAFARI | 4 Cyl 2.5L, 6 Cyl 4.3L
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GMC Safari BOOSTER
Part Number: 18060036
Product Specifications
- Other Name: Booster Assembly, Brake Booster
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1989 GMC Safari | VAN SAFARI | 4 Cyl 2.5L, 6 Cyl 4.3L
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GMC Safari Power Brake Booster Assembly
Part Number: 18060072
Product Specifications
- Other Name: Booster Asm,Power Brake; Brake Booster
- Replaces: 18013061
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1989 GMC Safari | VAN SAFARI | 4 Cyl 2.5L, 6 Cyl 4.3L
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GMC Safari Power Brake Booster Assembly
Part Number: 18060199
Product Specifications
- Other Name: Booster Asm,Power Brake ; Booster, Vacuum Power Brake; Booster Assembly
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994 GMC Safari | VAN SAFARI | 6 Cyl 4.3L
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GMC Safari Power Brake Booster ASSEMBLY
Part Number: 18012882
Product Specifications
- Other Name: Booster Assembly, Power Brake ; Booster, Vacuum Power Brake; Booster Assembly, Brake Booster
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1987-1989 GMC Safari | VAN SAFARI | 4 Cyl 2.5L, 6 Cyl 4.3L
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GMC Safari Power Brake Booster ASSEMBLY
Part Number: 18015835
Product Specifications
- Other Name: Booster Assembly, Power Brake ; Booster, Vacuum Power Brake
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1990-1992 GMC Safari | VAN SAFARI | 4 Cyl 2.5L, 6 Cyl 4.3L
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GMC Safari Power Brake Booster
Part Number: 15688264
Product Specifications
- Other Name: Booster,Power Brake(Hydraulic); Booster Assembly, Brake Booster
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 GMC Safari | VAN SAFARI | 6 Cyl 4.3L
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GMC Safari Power Brake Booster (Hydraulic)
Part Number: 15190654
Product Specifications
- Other Name: Booster,Power Brake(Hydraulic); Booster Assembly, Brake Booster
- Replaces: 15005448, 15965391, 15757254
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2002 GMC Safari | VAN SAFARI | 6 Cyl 4.3L
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GMC Safari BOOSTER ASM,P/B
Part Number: 19371353
Product Specifications
- Other Name: Booster Assembly, Brake Booster
- Replaces: 15215115, 15205912
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2005 GMC Safari | VAN SAFARI | 6 Cyl 4.3L

GMC Safari Brake Booster

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GMC Safari Brake Booster Parts Questions & Experts Answers

Power Brake Booster Assembly
18060105
Q: What is the function and maintenance requirements of the hydraulic power brake booster on GMC Safari?
A: The hydraulic booster, introduced in 1993 and later models, replaces the vacuum-powered brake booster and utilizes hydraulic pressure from the power steering pump to enhance brake power. It is mounted between the firewall and the Brake Master Cylinder. Normal operating parameters include a hissing noise during heavy braking and clunking or clicking noises when quickly releasing the brake pedal after hard braking. The hydraulic power brake booster requires no special maintenance but certain conditions must be met for proper functioning, such as a good condition drivebelt, correct power steering fluid level, kink-free pressure lines, leak-free booster unit, and an air bubble-free power steering system. Repair of the booster unit necessitates special tools, therefore, it is recommended to install a new or rebuilt unit if a problem arises. The removal process involves disconnecting the master cylinder, ABS control module, and isolation/dump valve, draining power steering fluid, disconnecting the power steering fluid reservoir supply hose and pressure lines, removing the driver's side knee bolster if necessary, disconnecting the pushrod from the brake pedal, and removing the booster unit from the firewall. Installation is the reverse of removal, including tightening the mounting nuts and hose fittings to specified torque, adding power steering fluid, checking for leaks, bleeding the power steering system, and testing the braking system before normal use.