Dorman - First Stop Brake Master Cylinder P/N:M390233
Turn every press of the brake pedal into hydraulic pressure for your brakes with the Dorman First Stop Brake Master Cylinder M630914. It is a new replacement designed to match the design, function and performance of the original master cylinder. It fits many vehicles, among them the 2015-2019 Chevrolet Silverado 1500, 2015-2019 GMC Sierra 1500 and 2015-2020 Chevrolet Tahoe, as a direct-fit replacement for the listed applications. See the Buyer's Guide tab for the full list.
The master cylinder converts force from the brake pedal into hydraulic pressure and sends brake fluid out to the brake lines. If a leaking or worn master cylinder is the cause of a soft or sinking pedal, this unit replaces it. It is a good choice if you are shopping for a GMC Sierra 1500 master cylinder for the 2015-2019 model years.
Specifications: single reservoir (included), sensor included, two outlets and a 1.313 in. bore diameter. Rearward outlet size: M14 x 1.5. Secondary outlet thread diameter: M14 x 1.5. Primary outlet thread pitch: 1.5 mm. Mounting hardware is not included. Country of origin: China.
Interchange: 100-3953 · 13-4668 · 130.66076 · 355-47202
20925765 · NM4297 · MC391486 · 1003953 · 134668 · 13066076 · 35547202
This part cross-references / interchanges with the following part numbers:
Is this the right Tahoe master cylinder for a 2015-2020 Chevrolet Tahoe?
Yes. It is listed as a direct-fit replacement for the 2015-2020 Chevrolet Tahoe. Check the Buyer's Guide tab to confirm your exact vehicle.
What does a brake master cylinder do?
It converts the force from the brake pedal into hydraulic pressure. It then sends brake fluid through its outlets to the brake lines and the wheel brakes.
What is included in the box?
The package contains the master cylinder with a single reservoir and a sensor included. Mounting hardware is not included.
What are the key specifications of M630914?
It has a cast iron housing, a 1.313 in. bore diameter and two outlets. The rearward outlet size is M14 x 1.5 and the primary outlet thread pitch is 1.5 mm. Its rubber parts are EPDM for resistance to glycol-based brake fluid.
What are signs a master cylinder may need replacing?
Common signs include a soft or sinking brake pedal, fluid leaking at the unit, and a dropping fluid level. Diagnose the cause first, because other brake parts can produce similar symptoms.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.