Dorman M39528 brake master cylinder for the 1983-1991 Chevrolet B60 and other vehicles turns pedal force into hydraulic pressure for the brakes. It has two outlets and comes with its reservoir.
- Cast iron housing for the cylinder body
- Rubber components made of an EPDM compound that resists glycol-based brake fluid
- Master cylinder made to meet SAE International standards
- Made entirely of new materials
Quick facts
- Part: Dorman M39528 brake master cylinder
- Fits: 1983-1991 Chevrolet B60 and other vehicles
- Material: Cast iron
- Condition: New
A brake pedal that sinks or feels soft, fluid around the cylinder body or a brake warning light can mean the master cylinder is worn. Before replacing it, look at the reservoir level and the cylinder body with the engine off, because a leak elsewhere or worn pads can give similar pedal symptoms; a shop can pressure-test the system. Each vehicle takes one master cylinder.
Fits
Coverage also includes the 1986-1991 GMC B6000 and the 1988-1990 Chevrolet P60.
Specifications
Fit and size
- Quantity per vehicle: 1
- Bore diameter: 1.75 in
- Number of outlets: 2
- Secondary outlet thread: 1/2-20 in
Build and materials
- Material: Cast iron
- Rubber components: EPDM compound
- Reservoir: included
- Condition: New
- Country of origin: China
In the box
One brake master cylinder with its reservoir. Mounting hardware and a sensor are not included, so plan on new hardware rather than reusing old pieces.
Interchange: 174-866 · 83-58002 · 100-2787 · M-92002 · 13-8001 · 10-8001 · 130.80016 · 130.82002 · 355-47214 · 355-47217
18M284 · M900490 · 11993 · MC252730 · 15500481 · 15601554 · 116702 · M8001 · MC39528 · F108144 · F116702 · MC108144 · MC116702
This part cross-references / interchanges with the following part numbers:
174-866, 18M284, 83-58002, M900490, 100-2787, M-92002, 11993, 13-8001, 10-8001, 130.80016, 130.82002, MC252730, 355-47214, 355-47217, 15500481, 15601554, 116702, M8001, MC39528, F108144, F116702, MC108144, MC116702
Frequently Asked Questions
Does the Dorman M39528 master cylinder fit a 1986-1991 GMC B6000?
Yes, Dorman M39528 fits the 1986-1991 GMC B6000 as well as the 1983-1991 Chevrolet B60. If your truck is a different one, look up its year and model in the "Vehicles it fits" section.
Does this brake master cylinder include the reservoir?
Yes, Dorman M39528 comes with its reservoir. Mounting hardware and a sensor are not included, so have those ready separately.
What are the rubber parts in this master cylinder made of?
All rubber components are made of an EPDM compound that resists glycol-based brake fluid. The cylinder housing is cast iron.
Can a sinking brake pedal mean the master cylinder is failing?
Yes, it can, if the cylinder's seals are leaking internally, but other brake parts can cause it too. Have the brakes inspected promptly, since pedal problems affect stopping.
Does Dorman M39528 replace the 18M284 master cylinder?
Yes, 18M284 is on the list of numbers that Dorman M39528 replaces.
