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Dorman M39651 Brake Master Cylinder
Overview of Dorman Brake Master Cylinder M39651
The Dorman Brake Master Cylinder M39651 is designed specifically for Chevrolet and GMC trucks, including the C1500 and K1500 models. This master cylinder features a durable aluminum construction and includes a reservoir, providing reliable brake hydraulics performance for your vehicle.
- Master cylinder bore diameter: 1 inch
- Constructed from aluminum for strength and corrosion resistance
- Includes reservoir for brake fluid
- Two outlet ports for brake line connections
- Rearward outlet size: 1/2-20 thread
- Secondary outlet thread diameter: 9/16-18
- Mounting hardware not included
Detailed Product Description
The Dorman M39651 brake master cylinder is engineered to meet the hydraulic braking needs of Chevrolet C1500 and GMC K1500 trucks. Its 1-inch bore diameter ensures proper fluid displacement for effective brake pressure. Made from aluminum, this master cylinder offers resistance to rust and wear, extending the service life of your brake system. The included reservoir simplifies installation and maintenance by providing a ready-to-use brake fluid container. With two outlets featuring specific thread sizes (1/2-20 rearward and 9/16-18 secondary), this part is compatible with the brake line fittings on the specified truck models.
Common Applications and Issues Addressed
- Restores proper brake fluid pressure for safe stopping
- Replaces leaking or damaged master cylinders
- Solves spongy or unresponsive brake pedal feel
- Addresses brake fluid contamination or reservoir damage
- Improves brake system reliability on Chevrolet C1500 and GMC K1500 trucks
Installation Notes and Tips
- Ensure compatibility with Chevrolet C1500 or GMC K1500 before installation
- Brake system should be properly bled after installation to remove air
- Mounting hardware is not included; reuse existing hardware or source separately
- Inspect brake lines and fittings for wear or damage during replacement
- Follow manufacturer torque specifications for outlet fittings
Quality Assurance and Warranty
Dorman manufactures the M39651 brake master cylinder to meet or exceed OEM standards for fit and function. The aluminum construction provides durability and corrosion resistance. While mounting hardware is not included, the product is supplied with a pre-installed reservoir and correctly sized outlets for direct replacement. Warranty details should be confirmed through the point of purchase or Dorman's official documentation.
| Brand | Dorman |
|---|---|
| Part Number | M39651 |
| Master Cylinder Bore Diameter | 1 |
| Master Cylinder Material | Aluminum |
| Mounting Hardware Included | No |
| Number of Outlets | 2 |
| Package Contents | Master Cylinder |
| Rearward Outlet Size | 1/2-20 |
| Reservoir Included | Yes |
| Secondary Outlet Thread Diameter | 9/16-18 |
| Sensor Included | No |
This part fits 16 vehicles. Search below:
| Year | Make | Model | Body Type | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|
| 1991 | Chevrolet | C1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1991 | Chevrolet | K1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1991 | GMC | C1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1991 | GMC | K1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1990 | Chevrolet | C1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1990 | Chevrolet | K1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1990 | GMC | C1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1990 | GMC | K1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1989 | Chevrolet | C1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1989 | Chevrolet | K1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1989 | GMC | C1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1989 | GMC | K1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1988 | Chevrolet | C1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1988 | Chevrolet | K1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1988 | GMC | C1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
| 1988 | GMC | K1500 | Standard Cab Pickup | GAS | N/A | Bore sizes of 24.4mm and 36mm, compatible with vehicles without Heavy Duty Suspension. |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.