Turn every press of the brake pedal into hydraulic pressure at the wheels with the Dorman First Stop Brake Master Cylinder M630283, a 100% new aluminum unit engineered to match the original master cylinder's design, function and performance. It fits many vehicles, among them the 2003-2004 Chevrolet Silverado 1500, 2003-2004 GMC Sierra 1500 and 2003-2004 Chevrolet Tahoe, all engines. See the "Vehicles it fits" section for the full list.
- Precise replacement: the cylinder housing is constructed to match the original part's casting material for similar performance. The master cylinder material is aluminum.
- Durable design: every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: made entirely of new materials for quality and safety.
- Strict specifications: made to meet rigorous SAE International standards.
Specifications: The bore diameter is 1.25 in. It has two outlets, and both the rearward and secondary outlets use 1/2-20 threads. The reservoir and sensor are included. Mounting hardware is not included, so consult the vehicle service information for the correct fasteners and whether the originals may be reused. Country of origin: China.
Signs a master cylinder may need replacing include a soft or sinking brake pedal, brake fluid leaking at the cylinder or reservoir, or a lit brake warning light. Other brake components can cause these symptoms, so diagnose the cause before replacing the master cylinder. After installation, bleed the brake system following the service procedure.
Interchange: 174-795 · 100-2636 · 13-3082 · 13-4246 · 10-3082 · 130.66048 · 131.66048 · 355-47175
13906 · MC512600 · 18047527 · NM4073 · MC390806 · F140375 · F140376 · MC140375 · MC140376 · 174795 · 1002636 · 133082 · 134246 · 103082 · 13066048 · 13166048 · 35547175
This part cross-references / interchanges with the following part numbers:
174-795, 100-2636, 13906, 13-3082, 13-4246, 10-3082, 130.66048, 131.66048, MC512600, 355-47175, 18047527, NM4073, MC390806, F140375, F140376, MC140375, MC140376
Frequently Asked Questions
Is this the right master cylinder for my 2003-2004 Chevrolet Tahoe?
It is listed as a direct-fit replacement for the 2003-2004 Chevrolet Tahoe with all engines. Check the "Vehicles it fits" section to confirm your exact vehicle.
Is this also a master cylinder for the 2003-2004 GMC Sierra 1500?
Yes. It is listed for the 2003-2004 GMC Sierra 1500 with all engines. The "Vehicles it fits" section shows the other listed vehicles.
What are the bore size and outlet threads?
It has a 1.25 in bore diameter and two outlets. The rearward and secondary outlets both use 1/2-20 threads.
What comes in the box?
You get one master cylinder with the reservoir and sensor included. Mounting hardware is not included, so check the service information for the correct fasteners.
What are signs my master cylinder may need replacing?
A soft or sinking pedal, fluid leaking at the cylinder, or a brake warning light may be signs of a failing master cylinder. Other brake parts can cause these symptoms too, so diagnose the cause first.
