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ACDelco 18M246 Brake Master Cylinder

ACDelco 18M246 Brake Master Cylinder Image 1
ACDelco 18M246 Brake Master Cylinder Image 2
ACDelco 18M246 Brake Master Cylinder Image 3
ACDelco 18M246 Brake Master Cylinder

ACDelco
Brand:ACDelco
Part Number: 18M246
UPC: 00036666697346
Weight: 16.77 lbs
Condition:New



Availability:
0 in Stock
 OUT OF STOCK

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:
1.750 in.
Brake Booster Included:
No
Height (in):
5.6 in
Length (in):
11.3 in
Master Cylinder Bore Diameter:
1.75 in.
Master Cylinder Bore Diameter:
44.45 mm
Master Cylinder Cap Included:
Yes
Master Cylinder Material:
Iron
Mounting Bracket Included:
No
Mounting Hole Diameter:
0.433 in.
Mounting Hole Quantity:
4
Port Quantity:
2
Primary Outlet Thread Diameter:
0.5 in.
Primary Outlet Thread Diameter:
12.7 mm
Programming Required:
No
Push Rod Included:
No
Reservoir Included:
Yes
Secondary Outlet Thread Diameter:
0.5625 in.
Secondary Outlet Thread Diameter:
14.287 mm
Weight (lb):
16.77 lb
Width (in):
7.7 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 18M246 Brake Master Cylinder fitment info!

Last Updated: 03/09/2024

Years Vehicle Per Vehicle Fit NotesFitment Notes
Chevrolet B60

8.2L V8 Diesel,
8.2L V8 Diesel Turbo
1
 
Professional
Front Drum Brakes
 

Chevrolet B60



8.2L V8 Diesel,
8.2L V8 Diesel Turbo Professional
Front Drum Brakes

1 Per Vehicle
Chevrolet B60

5.7L V8 Gas,
6.0L V8 Gas
1
 
Professional
Front Drum Brakes
 

Chevrolet B60



5.7L V8 Gas,
6.0L V8 Gas Professional
Front Drum Brakes

1 Per Vehicle
Chevrolet B60

14.0L L6 Diesel Turbo
1
 
Professional
Front Drum Brakes
 

Chevrolet B60



14.0L L6 Diesel Turbo Professional
Front Drum Brakes

1 Per Vehicle
Chevrolet B60

7.0L V8 Gas
1
 
Professional
Front Drum Brakes
 

Chevrolet B60



7.0L V8 Gas Professional
Front Drum Brakes

1 Per Vehicle
Chevrolet B60

8.2L V8 Diesel,
8.2L V8 Diesel Turbo
1
 
Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes
 

Chevrolet B60



8.2L V8 Diesel,
8.2L V8 Diesel Turbo Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes

1 Per Vehicle
Chevrolet B60

5.7L V8 Gas,
6.0L V8 Gas,
7.0L V8 Gas
1
 
Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes
 

Chevrolet B60



5.7L V8 Gas,
6.0L V8 Gas,
7.0L V8 Gas Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes

1 Per Vehicle
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 Dual Hydraulic System
Bendix Brakes
1 3/4 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 Dual Hydraulic System
Bendix Brakes
1 3/4 Bore Diameter

1 Per Vehicle
Chevrolet C70

6.1L L6 Diesel Turbo
1
 
Professional
with Dual Hydraulic System
with 4 Bolt Mounting
1 3/4 Bore Diameter
 

Chevrolet C70



6.1L L6 Diesel Turbo Professional
with Dual Hydraulic System
with 4 Bolt Mounting
1 3/4 Bore Diameter

1 Per Vehicle
Chevrolet C70

10.4L V8 Diesel Turbo
1
 
Professional
with Dual Hydraulic System
with 4 Bolt Mounting
1 3/4 Bore Diameter
 

Chevrolet C70



10.4L V8 Diesel Turbo Professional
with Dual Hydraulic System
with 4 Bolt Mounting
1 3/4 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
with Dual Hydraulic System
with 4 Bolt Mounting
1 3/4 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
with Dual Hydraulic System
with 4 Bolt Mounting
1 3/4 Bore Diameter

1 Per Vehicle
Chevrolet C70

7.4L V8 Gas OHV
1
 
Professional
with Dual Hydraulic System
with 4 Bolt Mounting
1 3/4 Bore Diameter
 

Chevrolet C70



7.4L V8 Gas OHV Professional
with Dual Hydraulic System
with 4 Bolt Mounting
1 3/4 Bore Diameter

1 Per Vehicle
Chevrolet P40

4.8L L6 Gas OHV
1
 
Professional
with Dual Hydraulic System
Except BENDIX Master Cylinder
 

Chevrolet P40



4.8L L6 Gas OHV Professional
with Dual Hydraulic System
Except BENDIX Master Cylinder

1 Per Vehicle
Chevrolet P40

4.8L L6 Gas OHV
1
 
Professional
with Hydraulic Booster
1 3/4 Bore Diameter
 

Chevrolet P40



4.8L L6 Gas OHV Professional
with Hydraulic Booster
1 3/4 Bore Diameter

1 Per Vehicle
GMC B6000

8.2L V8 Diesel,
8.2L V8 Diesel Turbo
1
 
Professional
Front Drum Brakes
 

GMC B6000



8.2L V8 Diesel,
8.2L V8 Diesel Turbo Professional
Front Drum Brakes

1 Per Vehicle
GMC B6000

5.7L V8 Gas,
6.0L V8 Gas
1
 
Professional
Front Drum Brakes
 

GMC B6000



5.7L V8 Gas,
6.0L V8 Gas Professional
Front Drum Brakes

1 Per Vehicle
GMC B6000

14.0L L6 Diesel Turbo
1
 
Professional
Front Drum Brakes
 

GMC B6000



14.0L L6 Diesel Turbo Professional
Front Drum Brakes

1 Per Vehicle
GMC B6000

7.0L V8 Gas
1
 
Professional
Front Drum Brakes
 

GMC B6000



7.0L V8 Gas Professional
Front Drum Brakes

1 Per Vehicle
GMC B6000

8.2L V8 Diesel,
8.2L V8 Diesel Turbo
1
 
Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes
 

GMC B6000



8.2L V8 Diesel,
8.2L V8 Diesel Turbo Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes

1 Per Vehicle
GMC B6000

5.7L V8 Gas,
6.0L V8 Gas,
7.0L V8 Gas
1
 
Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes
 

GMC B6000



5.7L V8 Gas,
6.0L V8 Gas,
7.0L V8 Gas Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes

1 Per Vehicle
GMC C6000

7.0L V8 Gas
1
 
Professional
Front Disc Brakes
15,000 lb. Rear Axle
 

GMC C6000



7.0L V8 Gas Professional
Front Disc Brakes
15,000 lb. Rear Axle

1 Per Vehicle
GMC C6000

5.7L V8 Gas,
6.0L V8 Gas,
8.2L V8 Diesel
1
 
Professional
Front Disc Brakes
15,000 lb. Rear Axle
 

GMC C6000



5.7L V8 Gas,
6.0L V8 Gas,
8.2L V8 Diesel Professional
Front Disc Brakes
15,000 lb. Rear Axle

1 Per Vehicle
GMC C6000

4.8L L6 Gas OHV,
5.7L V8 Gas,
6.0L V8 Gas,
8.2L V8 Diesel
1
 
Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes
 

GMC C6000



4.8L L6 Gas OHV,
5.7L V8 Gas,
6.0L V8 Gas,
8.2L V8 Diesel Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes

1 Per Vehicle
GMC C6000

14.0L L6 Diesel Turbo,
7.0L V8 Gas
1
 
Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes
 

GMC C6000



14.0L L6 Diesel Turbo,
7.0L V8 Gas Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes

1 Per Vehicle
GMC C6000

10.4L V8 Diesel
1
 
Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes
 

GMC C6000



10.4L V8 Diesel Professional
w/ 5,000 lb. Front Axle
Front Disc Brakes

1 Per Vehicle
GMC C6000 Topkick

6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV
1
 
Professional
Front Disc Brakes
15,000 lb. Rear Axle
 

GMC C6000 Topkick



6.0L V8 Gas,
6.6L L6 Diesel Turbo,
7.0L V8 Gas OHV Professional
Front Disc Brakes
15,000 lb. Rear Axle

1 Per Vehicle
GMC C7000

10.4L V8 Diesel Turbo,
6.0L V8 Gas,
7.0L V8 Gas,
8.2L V8 Diesel,
8.2L V8 Diesel Turbo
1
 
Professional
w/ 5,000 lb. Front Axle
 

GMC C7000



10.4L V8 Diesel Turbo,
6.0L V8 Gas,
7.0L V8 Gas,
8.2L V8 Diesel,
8.2L V8 Diesel Turbo Professional
w/ 5,000 lb. Front Axle

1 Per Vehicle
GMC C7000

10.4L V8 Diesel
1
 
Professional
w/ 5,000 lb. Front Axle
 

GMC C7000



10.4L V8 Diesel Professional
w/ 5,000 lb. Front Axle

1 Per Vehicle
GMC C7000

10.4L V8 Diesel,
10.4L V8 Diesel Turbo,
6.0L V8 Gas,
6.1L L6 Diesel Turbo,
7.0L V8 Gas,
8.2L V8 Diesel,
8.2L V8 Diesel Turbo
1
 
Professional
w/ Front Disc Brakes
w/ 5,000 lb. Front Axle
 

GMC C7000



10.4L V8 Diesel,
10.4L V8 Diesel Turbo,
6.0L V8 Gas,
6.1L L6 Diesel Turbo,
7.0L V8 Gas,
8.2L V8 Diesel,
8.2L V8 Diesel Turbo Professional
w/ Front Disc Brakes
w/ 5,000 lb. Front Axle

1 Per Vehicle
GMC C7000

10.4L V8 Diesel,
10.4L V8 Diesel Turbo,
6.0L V8 Gas,
6.1L L6 Diesel Turbo,
7.0L V8 Gas,
8.2L V8 Diesel,
8.2L V8 Diesel Turbo
1
 
Professional
w/o Hydraulic Spring Parking Brake
Front Drum Brakes
Dual Hydraulic System
 

GMC C7000



10.4L V8 Diesel,
10.4L V8 Diesel Turbo,
6.0L V8 Gas,
6.1L L6 Diesel Turbo,
7.0L V8 Gas,
8.2L V8 Diesel,
8.2L V8 Diesel Turbo Professional
w/o Hydraulic Spring Parking Brake
Front Drum Brakes
Dual Hydraulic System

1 Per Vehicle
GMC C7000

6.1L L6 Diesel Turbo
1
 
Professional
w/o Hydraulic Spring Parking Brake
Dual Hydraulic System
 

GMC C7000



6.1L L6 Diesel Turbo Professional
w/o Hydraulic Spring Parking Brake
Dual Hydraulic System

1 Per Vehicle
GMC C7000

10.4L V8 Diesel Turbo
1
 
Professional
w/o Hydraulic Spring Parking Brake
Dual Hydraulic System
 

GMC C7000



10.4L V8 Diesel Turbo Professional
w/o Hydraulic Spring Parking Brake
Dual Hydraulic System

1 Per Vehicle
GMC C7000

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/o Hydraulic Spring Parking Brake
Dual Hydraulic System
 

GMC C7000



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/o Hydraulic Spring Parking Brake
Dual Hydraulic System

1 Per Vehicle
GMC C7000

7.4L V8 Gas OHV
1
 
Professional
w/o Hydraulic Spring Parking Brake
Dual Hydraulic System
 

GMC C7000



7.4L V8 Gas OHV Professional
w/o Hydraulic Spring Parking Brake
Dual Hydraulic System

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 LPG OHV,
8.2L V8 Diesel OHV,
8.2L V8 Diesel OHV Turbo
1
 
Professional
w/o Hydraulic Spring Parking Brake
Dual Hydraulic System
 

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 LPG OHV,
8.2L V8 Diesel OHV,
8.2L V8 Diesel OHV Turbo Professional
w/o Hydraulic Spring Parking Brake
Dual Hydraulic System

1 Per Vehicle
GMC P4500

3.4L 6 Diesel Turbo
1
 
Professional
with Dual Hydraulic System
Except BENDIX Master Cylinder
1 3/4 Bore Diameter
 

GMC P4500



3.4L 6 Diesel Turbo Professional
with Dual Hydraulic System
Except BENDIX Master Cylinder
1 3/4 Bore Diameter

1 Per Vehicle
GMC P4500

4.3L V6 Gas OHV
1
 
Professional
with Dual Hydraulic System
Except BENDIX Master Cylinder
1 3/4 Bore Diameter
 

GMC P4500



4.3L V6 Gas OHV Professional
with Dual Hydraulic System
Except BENDIX Master Cylinder
1 3/4 Bore Diameter

1 Per Vehicle
GMC P4500

4.8L L6 Gas OHV
1
 
Professional
with Dual Hydraulic System
Except BENDIX Master Cylinder
1 3/4 Bore Diameter
 

GMC P4500



4.8L L6 Gas OHV Professional
with Dual Hydraulic System
Except BENDIX Master Cylinder
1 3/4 Bore Diameter

1 Per Vehicle
GMC P4500

7.0L L6 Diesel
1
 
Professional
with Dual Hydraulic System
Except BENDIX Master Cylinder
1 3/4 Bore Diameter
 

GMC P4500



7.0L L6 Diesel Professional
with Dual Hydraulic System
Except BENDIX Master Cylinder
1 3/4 Bore Diameter

1 Per Vehicle