Turn brake-pedal effort into hydraulic pressure for the brakes with the Dorman brake master cylinder M39849 from the First Stop line. It is a direct-fit replacement for the 1987-1995 Chevrolet LLV. Dorman designed it to match the original master cylinder's design, function and performance. See the "Vehicles it fits" section for engine details.
A master cylinder converts the force from the brake pedal into hydraulic pressure and sends it through the brake lines. Dorman builds this unit from new, high-quality materials so that it serves as a safe, durable replacement.
- Precise replacement: the cylinder housing is built to match the casting material of the original part, for similar performance.
- Durable design: every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: made entirely from new materials for quality and safety.
- Strict specifications: built to meet rigorous SAE International standards.
Signs that a master cylinder may need replacing include a soft or sinking brake pedal, brake fluid leaking at the cylinder, or a lit brake warning light. Other brake faults can cause these same symptoms, so diagnose the system before replacing parts. Follow the vehicle's service procedure for installation and brake bleeding.
Interchange: 83-44003 · 100-2577 · M-86003 · 13-39849 · 10-2339 · 130.66003 · 355-47139
8344003 · 1002577 · M86003 · 1339849 · 102339 · 13066003 · 35547139 · 18M460 · M900667 · 12342 · MC128098 · 18014308 · M2339 · MC39849 · F128098
This part cross-references / interchanges with the following part numbers:
18M460, 83-44003, M900667, 100-2577, M-86003, 12342, 13-39849, 10-2339, 130.66003, MC128098, 355-47139, 18014308, M2339, MC39849, F128098
Frequently Asked Questions
What does this Dorman master cylinder do?
It converts the force from the brake pedal into hydraulic pressure and sends that pressure through the brake lines to the brakes.
Will this brake master cylinder fit my 1987-1995 Chevrolet LLV?
Yes. M39849 is a direct-fit replacement for the 1987-1995 Chevrolet LLV. Check the "Vehicles it fits" section for engine details for your vehicle.
What are the rubber components made of?
All of the rubber components are made from a high-quality EPDM compound, which resists glycol-based brake fluid.
What are signs a master cylinder may need replacing?
Common signs include a soft or sinking brake pedal, brake fluid leaking at the cylinder, or a lit brake warning light. Other brake faults can cause these symptoms, so diagnose the system first.
What standards is it built to?
It is made entirely from new materials and built to meet rigorous SAE International standards. Its housing matches the casting material of the original part.
