How to replace the vacuum brake booster on GMC Envoy?

You need to activate the parking brake and disconnect the master cylinder before you begin working on the vacuum Brake Booster replacement. Detach the vacuum hose from both the engine and the booster before taking out the left closeout/insulator panel. Unbolt the Pushrod retainer from the brake pedal pin before removing both the stop lamp switch and Pushrod from the same pin. Unscrew vacuum booster fixing nuts and set aside enough space for the generator plus gasket. Start by putting the gasket and vacuum booster assembly in position. After that, thread in the vacuum booster mounting nuts at 36 nm (27 ft. Lbs.). Put the stop lamp switch on the Pushrod then assemble it to the brake pedal pin. The Pushrod retainer slides right into place. Reattach the left insulator panel and link the vacuum hose to both boosters and the power unit before installing the valve unit.

OEM GMC Envoy Brake Booster

Brake Power Booster

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5 Brake Boosters found

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GMC Envoy Brake Booster Part Number: 15267004
Product Specifications
- Other Name: Booster, Power Brake; Booster Assembly; Booster, Hydraulic Power Brake Booster
- Replaces: 19208151
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2008 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Envoy Brake Booster Part Number: 84164397
Product Specifications
- Other Name: Booster, Hydraulic Power Brake Booster; Booster Assembly
- Replaces: 25828525
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Envoy Brake Booster Part Number: 84164396
Product Specifications
- Other Name: Booster, Hydraulic Power Brake Booster; Booster Assembly
- Replaces: 25828526
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
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GMC Envoy Brake Booster Part Number: 15267005
Product Specifications
- Other Name: Booster, Hydraulic Power Brake Booster; Booster Assembly
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2008 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
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GMC Envoy Brake Booster Part Number: 15247618
Product Specifications
- Other Name: Booster, Power Brake; Booster Assembly; Booster; Booster, Hydraulic Power Brake Booster
- Replaces: 18044444, 18047694
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2005 GMC Envoy | Denali, SLE, SLT | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS

GMC Envoy Brake Booster

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The GMC Envoy Brake Booster is a component of the braking system that helps in lessening the force applied to make the brakes work. Storing a vacuum, the brake booster increases the force applied by the driver on the pedal, which improves the braking system. There are two types of boosters used in Envoy vehicles: This category includes the vacuum-operated boosters and hydraulic boosters. Vacuum boosters work with the variation of vacuum pressure between the engine vacuum and the atmospheric pressure on the other hand hydraulic boosters operate with the variation of fluid pressure to apply the brake. The vacuum power boosters are indeed mostly effective but they sometimes can go bad and needs replacing. Also, for power brakes additional features there are Performance Brake Boosters and Power Brake Conversion Kits to anyone who wants to upgrade their car braking system more as for comfort and luxury.

GMC Envoy Brake Booster Parts and Q&A

Brake Booster
15247618
Q: How to replace the vacuum brake booster on GMC Envoy?
A:
You need to activate the parking brake and disconnect the master cylinder before you begin working on the vacuum Brake Booster replacement. Detach the vacuum hose from both the engine and the booster before taking out the left closeout/insulator panel. Unbolt the Pushrod retainer from the brake pedal pin before removing both the stop lamp switch and Pushrod from the same pin. Unscrew vacuum booster fixing nuts and set aside enough space for the generator plus gasket. Start by putting the gasket and vacuum booster assembly in position. After that, thread in the vacuum booster mounting nuts at 36 nm (27 ft. Lbs.). Put the stop lamp switch on the Pushrod then assemble it to the brake pedal pin. The Pushrod retainer slides right into place. Reattach the left insulator panel and link the vacuum hose to both boosters and the power unit before installing the valve unit.