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    ACDelco 19418187 - Brake Master Cylinder

    MPN: 19418187
    0.0
    Vehicle Specific
    Check if this part fits your vehicle.
    • $134.26
    Out of stock
      • Newparts SKU
        1785212
      • Weight
        1.98 lbs
      • Barcode
        00193468088571
      • Dimensions (L x W x H)
        12 x 8.12 x 7.38 in
      • Manufacturer Part #
        19418187
    • Brand
      ACDelco
    • Manufacturer
      ACDelco
    • MPN
      19418187
    • Features
      Bleeder Hoses Included : No
      Brake Booster Included : No
      Features & Benefits - Bullet 1 : Pressure tested to ensure safe and confident braking
      Features & Benefits - Bullet 2 : Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality
      Features & Benefits - Bullet 3 : GM-recommended replacement part for your GM vehicle's original factory component
      Features & Benefits - Bullet 4 : Offering the quality, reliability, and durability of GM OE
      Features & Benefits - Bullet 5 : Manufactured with GM Original Equipment specification for fit, form, and function
      Gasket Or Seal Included : Yes
      Good Maintenance Practices - Section 1 - Bullet 1 : Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations.
      Good Maintenance Practices - Section 1 - Bullet 2 : Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required.
      Good Maintenance Practices - Section 1 - Bullet 3 : Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary).
      Good Maintenance Practices - Section 1 - Bullet 4 : Check the thickness of your brake pads.
      Good Maintenance Practices - Section 1 - Header : The following inspections and maintenance procedures can help prevent potential brake problems.
      Good Maintenance Practices - Section 2 - Bullet 1 : Inspection of the brake hoses for brittleness or cracking.
      Good Maintenance Practices - Section 2 - Bullet 2 : Inspection of brake lining and pads for wear or contamination by brake fluid or grease.
      Good Maintenance Practices - Section 2 - Bullet 3 : Inspection of wheel bearings and grease seals.
      Good Maintenance Practices - Section 2 - Bullet 4 : Parking brake adjustments (as needed).
      Good Maintenance Practices - Section 2 - Header : The following should be conducted by a qualified technician:
      Height (in) : 5.5
      Length (in) : 12.75
      Master Cylinder Bore Diameter : 1
      Master Cylinder Cap Included : Yes
      Mounting Bracket Included : No
      Mounting Hardware Included : No
      Mounting Hole Quantity : 2
      Pedal Rod ID : No
      Piston Quantity : 1
      Port Quantity : 2
      Primary Outlet Thread Diameter : 0.43
      Product Description : ACDelco GM Original Equipment Brake Master Cylinder is a hydraulic pump mounted to the brake booster and contains a reservoir that holds brake fluid. This original equipment brake master cylinder has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. âš  WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov
      Push Rod Included : No
      Reservoir Included : Yes
      Reservoir Material : Plastic
      Reservoir Type : Single
      Secondary Outlet Thread Diameter : 0.43
      Sensor Included : Yes
      Signs of Wear & Troubleshooting - Section 1 - Bullet 1 : Brake warning light is on.
      Signs of Wear & Troubleshooting - Section 1 - Bullet 2 : Fluid spots beneath the car, indicating there may be a leak within the cylinder.
      Signs of Wear & Troubleshooting - Section 1 - Bullet 3 : Difficulty stopping the vehicle.
      Signs of Wear & Troubleshooting - Section 1 - Bullet 4 : A low or sinking brake pedal.
      Signs of Wear & Troubleshooting - Section 1 - Header : Brake cylinder signs of wear include:
      Weight (lb) : 1.98
      Width (in) : 9.88
    • EAN
      00193468088571
    • Part Type
      Brake Master Cylinder
    • Fitment
      • Fitment Type
        Vehicle Specific
    YearMakeModelSubmodelNotes
    2011ChevroletCorvetteBase (6.2 V8 GAS)
    2011ChevroletCorvetteGrand Sport (6.2 V8 GAS)
    2011ChevroletCorvetteZ06 (7.0 V8 GAS)
    2011ChevroletCorvetteZ06 Carbon (7.0 V8 GAS)
    2011ChevroletCorvetteZR1 (6.2 V8 GAS)
    2012ChevroletCorvetteBase (6.2 V8 GAS)
    2012ChevroletCorvetteGrand Sport (6.2 V8 GAS)
    2012ChevroletCorvetteZ06 (7.0 V8 GAS)
    2012ChevroletCorvetteZR1 (6.2 V8 GAS)
    2013ChevroletCorvette427 (7.0 V8 GAS)
    2013ChevroletCorvetteBase (6.2 V8 GAS)
    2013ChevroletCorvetteGrand Sport (6.2 V8 GAS)
    2013ChevroletCorvetteZ06 (7.0 V8 GAS)
    2013ChevroletCorvetteZR1 (6.2 V8 GAS)
    2010ChevroletCorvetteBase (6.2 V8 GAS)
    2010ChevroletCorvetteGrand Sport (6.2 V8 GAS)
    2010ChevroletCorvetteZ06 (7.0 V8 GAS)
    2010ChevroletCorvetteZR1 (6.2 V8 GAS)
    2009ChevroletCorvetteBase (6.2 V8 GAS)
    2009ChevroletCorvetteZ06 (7.0 V8 GAS)
    2009ChevroletCorvetteZR1 (6.2 V8 GAS)
    2009CadillacXLRPlatinum (4.6 V8 GAS)
    2009CadillacXLRV (4.4 V8 GAS)
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    Warranty Overview

    At Newparts, we stand behind the quality of the products we sell. Every part we offer is backed by a warranty designed to give you peace of mind and protect your investment.

    Standard Warranty – Most Parts

    • Coverage: 2 years or 24,000 miles (whichever comes first) from purchase date.

    • Protection: Defects in materials or workmanship under normal personal use.

    • Eligibility: Applies only to the original purchaser and the vehicle where the part was first installed.

    • Exclusions:

      • Wear-and-tear items (brake pads, filters, bulbs, wipers, etc.)

      • Commercial, fleet, rideshare, off-road, or racing use

      • Improper installation, misuse, accidents, or modifications

    • Not Covered: Labor, shipping, towing, or incidental costs.

    Bison Performance Warranty – Our House Brand

    • Coverage: Limited Lifetime Warranty for as long as you own your vehicle.

    • Applies To: All products sold under the Bison Performance label.

    • Premium Protection: Goes beyond our standard warranty — if it’s a Bison product, the 2-year/24k mile limit is replaced with lifetime coverage.

    • Exclusions: Same as the standard warranty (normal wear, commercial use, improper installation, etc.).

    • What’s Included: Replacement of the defective product (labor and shipping excluded).

    Warranty Claim Requirements

    To keep claims fast and fair, we require:

    • Proof of purchase (invoice or order confirmation).

    • Photos or videos showing the defective part, order number, date, VIN, and odometer reading.

    • Diagnostic reports or part returns for non-visible issues may be requested.

    • Claims must be truthful, properly documented, and reflect normal consumer use.

    Buy With Confidence: We back our products because we believe in their quality, with a transparent, customer-first warranty process you can trust. And with Bison Performance products, you’ll enjoy Limited Lifetime protection—an assurance few brands can match.

    For full details and exclusions, please see our complete Warranty Terms & Conditions.


    This summary is for convenience only. For full warranty coverage details, exclusions, and requirements, see our official Warranty Terms & Conditions. In case of conflict, the full policy governs.

    Return Policy Overview

    Most parts can be returned within 30 days of delivery if unused, uninstalled, and in original packaging.
    To start a return, use our Return Portal or contact support.

    • Restocking fee: Up to 20% may apply for certain orders (buyer’s remorse, order errors, or special-order items)

    • Refunds: Issued to your original payment method within 3–5 business days after inspection

    • Exchanges: Not automatic — please return and reorder

    • Replacements: May be approved for incorrect or defective items reported within 7 days

    Not returnable:

    • Used or installed parts

    • Electrical components

    • Opened filter kits, gaskets, or contaminated items

    • Final sale or custom orders

    Important Notes:

    • Return shipping is your responsibility unless we made a verified error

    • Fitment is the customer’s responsibility (we can assist, but do not guarantee)

    • Country of origin may vary and is not grounds for return

    For complete details, please see our full Return Policy.



    This Returns summary is provided for convenience only. All returns, refunds, and exchanges are subject to the complete Returns Policy. In the event of any conflict, the full policy governs.

    Fast, Reliable Shipping — Straight to Your Door

    We ship most orders the same day when placed before 2 PM CST (Monday–Friday). Our main warehouse is just east of Nashville, TN, and we also ship from multiple locations nationwide to get your order to you as quickly as possible.

    • We use trusted carriers like UPS, FedEx, and USPS.

    • Tracking info is emailed to you as soon as your order ships.

    • Delivery estimates at checkout are based on carrier data, but not guaranteed.

    Need help with a shipment?

    If your order is missing, damaged, or incorrect, just let us know within 5 days of delivery. We’ll walk you through the quick claim process — including a few photos to help us make things right.

    For full details, please see our complete Shipping Policy.


    This Shipping summary is provided for convenience only. Delivery times, carrier terms, fees, restrictions,  risk of loss, and other details are governed by our complete Shipping Policy. In the event of any conflict, the full policy governs.

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