GM Genuine Parts Brake Master Cylinder
OE
Pack of 1

GM Genuine Parts Brake Master Cylinder

GM Part #19420798

ACDelco Part #19420798

MSRP$203.64*

GM Genuine Parts Brake Master Cylinders are designed, engineered, and tested to rigorous standards, and are backed by General Motors.

  • Pressure tested to ensure safe and confident braking
  • Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)

Pack of 1

About this product

GM Genuine Parts Brake Master Cylinders are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These brake master cylinders are a hydraulic pump mounted to the brake booster and contains a reservoir that holds brake fluid. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

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  • Pressure tested to ensure safe and confident braking
  • Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM regularly updates production and service part designs to integrate new materials and technologies

Product Specifications

Mounting Bracket IncludedNo
Brake Booster IncludedNo
Mounting Hardware IncludedNo
Gasket Or Seal IncludedYes
Reservoir IncludedYes
Pushrod IncludedNo
Master Cylinder Cap IncludedYes
Bleeder Hoses IncludedNo
Port Quantity2
Reservoir MaterialPlastic
ClassificationOE
Master Cylinder Bore Diameter1.25 in / 31.81 mm
Mounting Hole Quantity2
Reservoir TypeSingle
Sensor IncludedYes
Dust BootNo
Piston Quantity2
Bleeder Screw IncludedNo

24 Months/Unlimited Miles Limited Warranty for Parts (plus Labor if installed by a GM dealer)

Please visit our warranty page on Gmparts.com for full warranty details.

The following inspections and maintenance procedures can help prevent potential brake problems.

  • Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations.
  • Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required.
  • Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary).
  • Check the thickness of your brake pads.
  • The following should be conducted by a qualified technician:
  • Inspection of the brake hoses for brittleness or cracking.
  • Inspection of brake lining and pads for wear or contamination by brake fluid or grease.
  • Inspection of wheel bearings and grease seals.
  • Parking brake adjustments (as needed).

Troubleshooting Tips:

  • Difficulty stopping the vehicle.
  • A low or sinking brake pedal.

ModelBody StyleTrimYear(s)
Sierra 15002009, 2010, 2011, 2012, 2013
Yukon2009, 2010, 2011, 2012, 2013, 2014
Yukon XL 15002009, 2010, 2011, 2012, 2013, 2014