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GM Original Equipment

Symptoms of a Failing Power Brake Booster:

  • Stiff brake pedal that is extremely hard to push
  • Longer stopping distance
  • Engine stalls when brakes are applied

Prior to replacing your Power Brake Booster:

  • Ensure the Vacuum Hose is properly connected and not loose
  • Check the Vacuum Hose for a blockage or leak
  • Inspect the Check Valve for cracks, looseness or damage

Testing your Power Brake Booster:

  • With the engine off, pump the brakes 5-6 times
  • Turn the engine on while pushing down lightly on the brake pedal
  • If your brake booster is working, the pedal will sink down about
  • If your brake booster is not working, nothing will happen or the brake pedal will push back against your foot

Brake Service GradeRegular
Booster TypeHydraulic
Brake Pedal Rod Extension IncludedYes
Master Cylinder IncludedNo
Mounting Hardware IncludedYes
Mounting Bracket IncludedYes
Alternate/OEM Part Number(s): 20940394

Warranty Information:
24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18; 12 Months on parts sold before 04/01/18.
Warranty Details