Brands Vehicles
Lowest Prices
Free Returns
Online Since 2009

ACDelco 18M11 Brake Master Cylinder

ACDelco 18M11 Brake Master Cylinder Image 1
ACDelco 18M11 Brake Master Cylinder Image 2
ACDelco 18M11 Brake Master Cylinder Image 3
ACDelco 18M11 Brake Master Cylinder Image 4
ACDelco 18M11 Brake Master Cylinder Image 5
ACDelco 18M11 Brake Master Cylinder Image 6
ACDelco 18M11 Brake Master Cylinder Image 7
ACDelco 18M11 Brake Master Cylinder Image 8
ACDelco 18M11 Brake Master Cylinder

ACDelco
Brand:ACDelco
Part Number: 18M11
UPC: 00036666694987
Weight: 7.4 lbs
Condition:New



On Sale:

$111.49

Availability:
1 in Stock
Warehouse: US-4
Quantity:

Product Information

Description:

MASTER CYL (B)

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):
6.2 in
Length (in):
8.4 in
Master Cylinder Bore Diameter:
1.5 in.
Master Cylinder Bore Diameter:
38.1 mm
Master Cylinder Cap Included:
Yes
Master Cylinder Material:
Iron
Mounting Bracket Included:
No
Mounting Hole Diameter:
0.406 in.
Mounting Hole Quantity:
2
Port Quantity:
1
Primary Outlet Thread Diameter:
0.5 in.
Primary Outlet Thread Diameter:
12.7 mm
Programming Required:
No
Push Rod Included:
No
Reservoir Included:
Yes
Weight (lb):
7.4 lb
Width (in):
6.2 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:
US

Select a vehicle to narrow ACDelco 18M11 Brake Master Cylinder fitment info!

Last Updated: 03/09/2024

Years Vehicle Per Vehicle Fit NotesFitment Notes
Chevrolet C50

10.4L V8 Diesel OHV,
4.8L L6 Gas OHV,
5.7L V8 Gas OHV,
5.7L V8 LPG OHV,
6.0L V8 Gas OHV,
6.0L V8 LPG OHV,
7.0L V8 Gas OHV,
7.0L V8 LPG OHV,
8.2L V8 Diesel OHV,
8.2L V8 Diesel OHV Turbo
1
 
Professional
with Vacuum Cylinder
Single Hydraulic System
1 1/2 Bore Diameter
 

Chevrolet C50



10.4L V8 Diesel OHV,
4.8L L6 Gas OHV,
5.7L V8 Gas OHV,
5.7L V8 LPG OHV,
6.0L V8 Gas OHV,
6.0L V8 LPG OHV,
7.0L V8 Gas OHV,
7.0L V8 LPG OHV,
8.2L V8 Diesel OHV,
8.2L V8 Diesel OHV Turbo Professional
with Vacuum Cylinder
Single Hydraulic System
1 1/2 Bore Diameter

1 Per Vehicle
Chevrolet C70

6.1L L6 Diesel Turbo
1
 
Professional
w/ 2 Bolt Mounting
Single Hydraulic System
Reservoir Cap Is Rectangular
1 1/2 Bore Diameter
 

Chevrolet C70



6.1L L6 Diesel Turbo Professional
w/ 2 Bolt Mounting
Single Hydraulic System
Reservoir Cap Is Rectangular
1 1/2 Bore Diameter

1 Per Vehicle
Chevrolet C70

10.4L V8 Diesel Turbo
1
 
Professional
w/ 2 Bolt Mounting
Single Hydraulic System
Reservoir Cap Is Rectangular
1 1/2 Bore Diameter
 

Chevrolet C70



10.4L V8 Diesel Turbo Professional
w/ 2 Bolt Mounting
Single Hydraulic System
Reservoir Cap Is Rectangular
1 1/2 Bore Diameter

1 Per Vehicle
Chevrolet C70

10.4L V8 Diesel,
6.0L V8 Gas,
7.0L V8 Gas,
8.2L V8 Diesel,
8.2L V8 Diesel Turbo,
9.1L V8 Diesel Turbo
1
 
Professional
w/ 2 Bolt Mounting
Single Hydraulic System
Reservoir Cap Is Rectangular
1 1/2 Bore Diameter
 

Chevrolet C70



10.4L V8 Diesel,
6.0L V8 Gas,
7.0L V8 Gas,
8.2L V8 Diesel,
8.2L V8 Diesel Turbo,
9.1L V8 Diesel Turbo Professional
w/ 2 Bolt Mounting
Single Hydraulic System
Reservoir Cap Is Rectangular
1 1/2 Bore Diameter

1 Per Vehicle
Chevrolet C70

7.4L V8 Gas OHV
1
 
Professional
w/ 2 Bolt Mounting
Single Hydraulic System
Reservoir Cap Is Rectangular
1 1/2 Bore Diameter
 

Chevrolet C70



7.4L V8 Gas OHV Professional
w/ 2 Bolt Mounting
Single Hydraulic System
Reservoir Cap Is Rectangular
1 1/2 Bore Diameter

1 Per Vehicle
GMC C5000

4.8L L6 Gas OHV,
5.7L V8 Gas
1
 
Professional
w/ Wagner Brake Booster
 

GMC C5000



4.8L L6 Gas OHV,
5.7L V8 Gas Professional
w/ Wagner Brake Booster

1 Per Vehicle
GMC C6000

10.4L V8 Diesel OHV,
10.4L V8 Diesel OHV Turbo,
3.5L L4 Diesel OHV,
3.5L L4 Diesel OHV Turbo,
4.8L L6 Gas OHV,
5.7L V8 Gas OHV,
5.7L V8 LPG OHV,
6.0L V8 Gas OHV,
6.0L V8 LPG OHV,
7.0L V8 Gas OHV,
8.2L V8 Diesel OHV,
8.2L V8 Diesel OHV Turbo
1
 
Professional
Single Hydraulic System
Front Drum Brakes
 

GMC C6000



10.4L V8 Diesel OHV,
10.4L V8 Diesel OHV Turbo,
3.5L L4 Diesel OHV,
3.5L L4 Diesel OHV Turbo,
4.8L L6 Gas OHV,
5.7L V8 Gas OHV,
5.7L V8 LPG OHV,
6.0L V8 Gas OHV,
6.0L V8 LPG OHV,
7.0L V8 Gas OHV,
8.2L V8 Diesel OHV,
8.2L V8 Diesel OHV Turbo Professional
Single Hydraulic System
Front Drum Brakes

1 Per Vehicle
GMC C7000

10.4L V8 Diesel OHV,
10.4L V8 Diesel OHV Turbo,
5.7L V8 Gas OHV,
5.7L V8 LPG OHV,
6.0L V8 Gas OHV,
6.0L V8 LPG OHV,
7.0L V8 Gas OHV,
7.0L V8 LPG OHV,
7.4L V8 Gas OHV,
7.4L V8 LPG OHV,
8.2L V8 Diesel OHV,
8.2L V8 Diesel OHV Turbo
1
 
Professional
Wagner Master Cylinder
Single Hydraulic System
1 1/2 Bore Diameter
 

GMC C7000



10.4L V8 Diesel OHV,
10.4L V8 Diesel OHV Turbo,
5.7L V8 Gas OHV,
5.7L V8 LPG OHV,
6.0L V8 Gas OHV,
6.0L V8 LPG OHV,
7.0L V8 Gas OHV,
7.0L V8 LPG OHV,
7.4L V8 Gas OHV,
7.4L V8 LPG OHV,
8.2L V8 Diesel OHV,
8.2L V8 Diesel OHV Turbo Professional
Wagner Master Cylinder
Single Hydraulic System
1 1/2 Bore Diameter

1 Per Vehicle