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ACDelco 18M2557 Brake Master Cylinder

ACDelco 18M2557 Brake Master Cylinder Image 1
ACDelco 18M2557 Brake Master Cylinder Image 2
ACDelco 18M2557 Brake Master Cylinder Image 3
ACDelco 18M2557 Brake Master Cylinder Image 4
ACDelco 18M2557 Brake Master Cylinder Image 5
ACDelco 18M2557 Brake Master Cylinder Image 6
ACDelco 18M2557 Brake Master Cylinder Image 7
ACDelco 18M2557 Brake Master Cylinder Image 8
ACDelco 18M2557 Brake Master Cylinder

ACDelco
Brand:ACDelco
Part Number: 18M2557
UPC: 00707773931202
Weight: 3.54 lbs
Condition:New



On Sale:

$134.25

Availability:
3 in Stock
Warehouse: US-12
Quantity:

Product Information

Description:

Get the ACDelco 18M2557 Brake Master Cylinder for your vehicle. Buy now and secure your purchase online!

ACDelco Professional Brake Master Cylinders use both aluminum and iron castings, making them a high quality replacement for many vehicles on the road today. These master cylinders contain both Ethylene Propylene (EPDM) and Styrene Butadiene (SBR) rubber components to provide superior resistance to heat, corrosion, and leakage. ACDelco Professional Brake Master Cylinders are ready to bench bleed and install right out of the box - no assembly required. These premium aftermarket replacement brake master cylinders are manufactured to meet your expectations for fit, form, and function. ⚠ WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov

Features and Benefits:

  • Cast iron and aluminum specifications; no extra stress on the brake boosting mounting
  • Geometrical tolerance ensures that the body and plastic reservoir match for a proper fit
  • Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality
  • Piston assembly and return spring help to prevent brake drag, which can cause premature brake pad wear
  • Pressure tested to ensure safe and confident braking

Specifications:

Bleeder Hoses Included:
Yes
Bore Size:
1.500 in.
Brake Booster Included:
No
Height (in):
5.8 in
Length (in):
13.4 in
Master Cylinder Bore Diameter:
1.5 in.
Master Cylinder Bore Diameter:
38.1 mm
Master Cylinder Cap Included:
Yes
Master Cylinder Material:
Aluminum
Mounting Bracket Included:
No
Mounting Hole Diameter:
0.421 in.
Mounting Hole Quantity:
2
Port Quantity:
2
Primary Outlet Thread Diameter:
0.472 in.
Primary Outlet Thread Diameter:
12 mm
Programming Required:
No
Push Rod Included:
No
Reservoir Included:
Yes
Secondary Outlet Thread Diameter:
0.472 in.
Secondary Outlet Thread Diameter:
12 mm
Weight (lb):
3.54 lb
Width (in):
9.3 in

Features and Benefits:

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

Specifications:

Country of Origin:
CN

Select a vehicle to narrow ACDelco 18M2557 Brake Master Cylinder fitment info!

Last Updated: 03/09/2024

Years Vehicle Per Vehicle Fit NotesFitment Notes
Chevrolet Express 2500

6.0L V8 CNG OHV
1
 
Professional
Except Active Brake Control
 

Chevrolet Express 2500



6.0L V8 CNG OHV Professional
Except Active Brake Control

1 Per Vehicle
Chevrolet Express 2500

4.8L V8 Flex OHV,
6.0L V8 Flex OHV
1
 
Professional
Except Active Brake Control
 

Chevrolet Express 2500



4.8L V8 Flex OHV,
6.0L V8 Flex OHV Professional
Except Active Brake Control

1 Per Vehicle
Chevrolet Express 2500

6.6L V8 Diesel OHV Turbo
1
 
Professional
Except Active Brake Control
 

Chevrolet Express 2500



6.6L V8 Diesel OHV Turbo Professional
Except Active Brake Control

1 Per Vehicle
Chevrolet Express 2500

4.8L V8 Gas OHV,
6.0L V8 Gas OHV
1
 
Professional
Except Active Brake Control
 

Chevrolet Express 2500



4.8L V8 Gas OHV,
6.0L V8 Gas OHV Professional
Except Active Brake Control

1 Per Vehicle
Chevrolet Express 3500

2.8L L4 Diesel DOHC Turbo
1
 
Professional
Except Active Brake Control
 

Chevrolet Express 3500



2.8L L4 Diesel DOHC Turbo Professional
Except Active Brake Control

1 Per Vehicle
Chevrolet Express 3500

6.0L V8 Gas OHV
1
 
Professional
Except Active Brake Control
 

Chevrolet Express 3500



6.0L V8 Gas OHV Professional
Except Active Brake Control

1 Per Vehicle
Chevrolet Express 3500

4.8L V8 Flex OHV,
6.0L V8 Flex OHV
1
 
Professional
Except Active Brake Control
 

Chevrolet Express 3500



4.8L V8 Flex OHV,
6.0L V8 Flex OHV Professional
Except Active Brake Control

1 Per Vehicle
Chevrolet Express 3500

6.0L V8 CNG OHV
1
 
Professional
Except Active Brake Control
 

Chevrolet Express 3500



6.0L V8 CNG OHV Professional
Except Active Brake Control

1 Per Vehicle
Chevrolet Express 3500

6.6L V8 Diesel OHV Turbo
1
 
Professional
Except Active Brake Control
 

Chevrolet Express 3500



6.6L V8 Diesel OHV Turbo Professional
Except Active Brake Control

1 Per Vehicle
Chevrolet Express 3500

4.8L V8 Gas OHV,
6.0L V8 Gas OHV
1
 
Professional
Except Active Brake Control
 

Chevrolet Express 3500



4.8L V8 Gas OHV,
6.0L V8 Gas OHV Professional
Except Active Brake Control

1 Per Vehicle
Chevrolet Express 4500

6.0L V8 Flex
1
 
Professional
w/o Stabilitrak
 

Chevrolet Express 4500



6.0L V8 Flex Professional
w/o Stabilitrak

1 Per Vehicle
Chevrolet Express 4500

6.0L V8 CNG OHV
1
 
Professional
w/o Stabilitrak
 

Chevrolet Express 4500



6.0L V8 CNG OHV Professional
w/o Stabilitrak

1 Per Vehicle
Chevrolet Express 4500

6.0L V8 Flex OHV
1
 
Professional
w/o Stabilitrak
 

Chevrolet Express 4500



6.0L V8 Flex OHV Professional
w/o Stabilitrak

1 Per Vehicle
Chevrolet Express 4500

6.6L V8 Diesel OHV Turbo
1
 
Professional
w/o Stabilitrak
 

Chevrolet Express 4500



6.6L V8 Diesel OHV Turbo Professional
w/o Stabilitrak

1 Per Vehicle
Chevrolet Express 4500

6.0L V8 Gas OHV
1
 
Professional
w/o Stabilitrak
 

Chevrolet Express 4500



6.0L V8 Gas OHV Professional
w/o Stabilitrak

1 Per Vehicle
Chevrolet Silverado 2500 HD

6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo
1
 
Professional
with Active Brake Control
w/ Trailer Brake Control
 

Chevrolet Silverado 2500 HD



6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo Professional
with Active Brake Control
w/ Trailer Brake Control

1 Per Vehicle
Chevrolet Silverado 2500 HD

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo
1
 
Professional
without Trailer Brake Control
Except Active Brake Control
 

Chevrolet Silverado 2500 HD



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo Professional
without Trailer Brake Control
Except Active Brake Control

1 Per Vehicle
Chevrolet Silverado 3500 HD

6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo
1
 
Professional
without Trailer Brake Control
With Dual Rear Wheels
 

Chevrolet Silverado 3500 HD



6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo Professional
without Trailer Brake Control
With Dual Rear Wheels

1 Per Vehicle
Chevrolet Silverado 3500 HD

6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo
1
 
Professional
with Active Brake Control
w/ Trailer Brake Control
 

Chevrolet Silverado 3500 HD



6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo Professional
with Active Brake Control
w/ Trailer Brake Control

1 Per Vehicle
Chevrolet Silverado 3500 HD

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo
1
 
Professional
without Trailer Brake Control
Except Active Brake Control
 

Chevrolet Silverado 3500 HD



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo Professional
without Trailer Brake Control
Except Active Brake Control

1 Per Vehicle
Chevrolet Suburban 2500

6.0L V8 Flex OHV
1
 
Professional
without Trailer Brake Control
 

Chevrolet Suburban 2500



6.0L V8 Flex OHV Professional
without Trailer Brake Control

1 Per Vehicle
Chevrolet Suburban 2500

6.0L V8 Gas OHV
1
 
Professional
without Trailer Brake Control
 

Chevrolet Suburban 2500



6.0L V8 Gas OHV Professional
without Trailer Brake Control

1 Per Vehicle
GMC Savana 2500

2.8L L4 Diesel DOHC Turbo,
4.8L V8 Flex OHV,
6.0L V8 Flex OHV,
6.0L V8 Gas OHV
1
 
Professional
w/o Active Brake Control (JL4)
 

GMC Savana 2500



2.8L L4 Diesel DOHC Turbo,
4.8L V8 Flex OHV,
6.0L V8 Flex OHV,
6.0L V8 Gas OHV Professional
w/o Active Brake Control (JL4)

1 Per Vehicle
GMC Savana 2500

6.0L V8 CNG OHV
1
 
Professional
Except Active Brake Control
 

GMC Savana 2500



6.0L V8 CNG OHV Professional
Except Active Brake Control

1 Per Vehicle
GMC Savana 2500

4.8L V8 Flex OHV,
6.0L V8 Flex OHV
1
 
Professional
Except Active Brake Control
 

GMC Savana 2500



4.8L V8 Flex OHV,
6.0L V8 Flex OHV Professional
Except Active Brake Control

1 Per Vehicle
GMC Savana 2500

6.6L V8 Diesel OHV Turbo
1
 
Professional
Except Active Brake Control
 

GMC Savana 2500



6.6L V8 Diesel OHV Turbo Professional
Except Active Brake Control

1 Per Vehicle
GMC Savana 2500

4.8L V8 Gas OHV,
6.0L V8 Gas OHV
1
 
Professional
Except Active Brake Control
 

GMC Savana 2500



4.8L V8 Gas OHV,
6.0L V8 Gas OHV Professional
Except Active Brake Control

1 Per Vehicle
GMC Savana 3500

2.8L L4 Diesel DOHC Turbo
1
 
Professional
Except Active Brake Control
 

GMC Savana 3500



2.8L L4 Diesel DOHC Turbo Professional
Except Active Brake Control

1 Per Vehicle
GMC Savana 3500

6.0L V8 Gas OHV
1
 
Professional
Except Active Brake Control
 

GMC Savana 3500



6.0L V8 Gas OHV Professional
Except Active Brake Control

1 Per Vehicle
GMC Savana 3500

4.8L V8 Flex OHV,
6.0L V8 Flex OHV
1
 
Professional
Except Active Brake Control
 

GMC Savana 3500



4.8L V8 Flex OHV,
6.0L V8 Flex OHV Professional
Except Active Brake Control

1 Per Vehicle
GMC Savana 3500

6.0L V8 CNG OHV
1
 
Professional
Except Active Brake Control
 

GMC Savana 3500



6.0L V8 CNG OHV Professional
Except Active Brake Control

1 Per Vehicle
GMC Savana 3500

6.6L V8 Diesel OHV Turbo
1
 
Professional
Except Active Brake Control
 

GMC Savana 3500



6.6L V8 Diesel OHV Turbo Professional
Except Active Brake Control

1 Per Vehicle
GMC Savana 3500

4.8L V8 Gas OHV,
6.0L V8 Gas OHV
1
 
Professional
Except Active Brake Control
 

GMC Savana 3500



4.8L V8 Gas OHV,
6.0L V8 Gas OHV Professional
Except Active Brake Control

1 Per Vehicle
GMC Savana 4500

6.0L V8 Flex
1
 
Professional
w/o Stabilitrak
 

GMC Savana 4500



6.0L V8 Flex Professional
w/o Stabilitrak

1 Per Vehicle
GMC Savana 4500

6.0L V8 CNG OHV
1
 
Professional
w/o Stabilitrak
 

GMC Savana 4500



6.0L V8 CNG OHV Professional
w/o Stabilitrak

1 Per Vehicle
GMC Savana 4500

6.0L V8 Flex OHV
1
 
Professional
w/o Stabilitrak
 

GMC Savana 4500



6.0L V8 Flex OHV Professional
w/o Stabilitrak

1 Per Vehicle
GMC Savana 4500

6.6L V8 Diesel OHV Turbo
1
 
Professional
w/o Stabilitrak
 

GMC Savana 4500



6.6L V8 Diesel OHV Turbo Professional
w/o Stabilitrak

1 Per Vehicle
GMC Savana 4500

6.0L V8 Gas OHV
1
 
Professional
w/o Stabilitrak
 

GMC Savana 4500



6.0L V8 Gas OHV Professional
w/o Stabilitrak

1 Per Vehicle
GMC Sierra 2500 HD

6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo
1
 
Professional
with Active Brake Control
w/ Trailer Brake Control
 

GMC Sierra 2500 HD



6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo Professional
with Active Brake Control
w/ Trailer Brake Control

1 Per Vehicle
GMC Sierra 2500 HD

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo
1
 
Professional
without Trailer Brake Control
Except Active Brake Control
 

GMC Sierra 2500 HD



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo Professional
without Trailer Brake Control
Except Active Brake Control

1 Per Vehicle
GMC Sierra 3500 HD

6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo
1
 
Professional
With Dual Rear Wheels
 

GMC Sierra 3500 HD



6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo Professional
With Dual Rear Wheels

1 Per Vehicle
GMC Sierra 3500 HD

6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo
1
 
Professional
without Trailer Brake Control
With Dual Rear Wheels
 

GMC Sierra 3500 HD



6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo Professional
without Trailer Brake Control
With Dual Rear Wheels

1 Per Vehicle
GMC Sierra 3500 HD

6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo
1
 
Professional
with Active Brake Control
w/ Trailer Brake Control
 

GMC Sierra 3500 HD



6.0L V8 Flex OHV,
6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo Professional
with Active Brake Control
w/ Trailer Brake Control

1 Per Vehicle
GMC Sierra 3500 HD

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo
1
 
Professional
without Trailer Brake Control
Except Active Brake Control
 

GMC Sierra 3500 HD



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo Professional
without Trailer Brake Control
Except Active Brake Control

1 Per Vehicle
GMC Yukon XL 2500

6.0L V8 Flex OHV
1
 
Professional
without Trailer Brake Control
 

GMC Yukon XL 2500



6.0L V8 Flex OHV Professional
without Trailer Brake Control

1 Per Vehicle
GMC Yukon XL 2500

6.0L V8 Gas OHV
1
 
Professional
without Trailer Brake Control
 

GMC Yukon XL 2500



6.0L V8 Gas OHV Professional
without Trailer Brake Control

1 Per Vehicle