GM GENUINE PARTS Brake Booster Check Valve Kit 179-1266 — OE-fit check valve with grommet restores vacuum and pedal feel

GM Genuine Parts 179-1266 is a factory‑spec power brake booster vacuum check valve kit that restores one‑way vacuum protection for your vehicle’s brake booster.

When the brake booster loses vacuum, pedal feel and braking confidence can suffer. This GM Genuine Parts kit (also referenced as 18022219) includes the vacuum check valve and grommet manufactured to General Motors original equipment specifications so the parts fit correctly, function as intended, and match the durability of the vehicle’s factory components. It’s designed for vehicle‑specific applications and is recommended by GM as a direct replacement for the original check valve and sealing grommet.

How does this check valve affect brake booster performance?

The check valve allows vacuum to flow from the engine to the brake booster but prevents air from returning when the engine is off or a hose loses vacuum. That one‑way action keeps boost pressure available for multiple brake applications immediately after engine start and during brief vacuum interruptions.

• Prevents air ingress into the booster when engine vacuum is absent.
• Maintains consistent pedal feel by preserving booster vacuum.
• Reduces the chance of a hard or inconsistent brake pedal after engine shutdown.

What comes in the GM Genuine Parts 179-1266 kit and why does it matter?

The kit contains a precision‑molded check valve and a matching grommet selected for the correct bore and sealing surface. Using both parts together ensures a leak‑free installation and restores the original fitment that prevents vacuum leaks and premature service issues.

• Includes the one‑way vacuum check valve sized for your GM vehicle.
• Includes grommet matched to the booster or hose fitting to ensure a tight seal.
• Manufactured to GM original equipment fit, form, and function standards.

How do I know this is the right replacement for my vehicle?

This GM Genuine Parts unit is a vehicle‑specific part listed to replace the original factory component. Confirm the part number 179‑1266 (18022219) against your vehicle’s parts catalog or VIN‑based lookup to ensure compatibility before ordering.

• Part number: 179‑1266 (also referenced 18022219).
• Designed to match GM OE dimensions and connections for direct replacement.
• Recommended by GM as the proper replacement for the factory check valve and grommet.

What should I expect during installation and maintenance?

Installation is straightforward for mechanically inclined users: remove the old valve and grommet, install the new grommet in the booster or hose fitting, and press the check valve into place. Routine inspections of vacuum hoses and fittings help preserve booster performance and prolong part life.

• Simple push‑in installation; no special tools typically required.
• Inspect connecting hoses for cracks or deterioration when replacing the valve.
• Check that the valve seals and is oriented correctly for one‑way vacuum flow.

Who this is for: Drivers and technicians who need an exact GM‑approved replacement for a worn or faulty power brake booster check valve. Ideal for owners restoring correct brake booster vacuum function, fleet maintenance professionals keeping GM vehicles to factory standards, and DIYers seeking a straightforward, vehicle‑specific fix that preserves original braking performance.

Notes: Manufactured to GM original equipment specifications for fit, form, and function. Country of origin: China. Fit type: Vehicle specific. Always verify fitment with your vehicle’s parts catalog or VIN lookup before purchase.