Dorman CM640037 Clutch Master Cylinder
Confirm Fitment Before You Buy
Not sure it fits? Message Year/Make/Model/Engine (2WD/4WD if applicable) and we’ll help confirm compatibility.
Why buy from Koskowski Automotive?
• 50+ years (since 1972) • Dorman Authorized Seller • Fast shipping • Easy returns
Regular price
$81.87
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Vehicle Fitment: Use the table below to match your exact configuration. If you don’t see your exact setup, message us before ordering.
Product Description
Clutch master cylinder leaking or malfunctioning? This direct replacement is precision-engineered to match the original equipment design in specific vehicle years, makes and models for a reliable replacement.
- Direct replacement - this clutch master cylinder is built to match the original clutch master in specific vehicles
- Precise design - reverse-engineered from original equipment to fit seamlessly and function reliably
- Durable materials - includes high-grade rubber components for compatibility with standard brake fluid
- Trustworthy value - backed by team of engineers and quality control experts in the United States
Detailed Applications
| Year | Make | Model | Configuration | Positions | Application Notes |
|---|---|---|---|---|---|
| 2006 | Chevrolet | Silverado 2500 HD | 6 Speed Trans. | Bore: 18 mm | |
| 2006 | Chevrolet | Silverado 3500 | 6 Speed Trans. | Bore: 18 mm | |
| 2006 | GMC | Sierra 2500 HD | 6 Speed Trans. | Bore: 18 mm | |
| 2006 | GMC | Sierra 3500 | 6 Speed Trans. | Bore: 18 mm | |
| 2005 | Chevrolet | Silverado 2500 HD | 6 Speed Trans. | Bore: 18 mm | |
| 2005 | Chevrolet | Silverado 3500 | 6 Speed Trans. | Bore: 18 mm | |
| 2005 | GMC | Sierra 2500 HD | 6 Speed Trans. | Bore: 18 mm | |
| 2005 | GMC | Sierra 3500 | 6 Speed Trans. | Bore: 18 mm | |
| 2004 | Chevrolet | Silverado 2500 HD | 6 Speed Trans. | Bore: 18 mm | |
| 2004 | Chevrolet | Silverado 3500 | 6 Speed Trans. | Bore: 18 mm | |
| 2004 | GMC | Sierra 2500 HD | 6 Speed Trans. | Bore: 18 mm | |
| 2004 | GMC | Sierra 3500 | 6 Speed Trans. | Bore: 18 mm | |
| 2003 | Chevrolet | Silverado 2500 HD | 6 Speed Trans. | Bore: 18 mm | |
| 2003 | Chevrolet | Silverado 3500 | 6 Speed Trans. | Bore: 18 mm | |
| 2003 | GMC | Sierra 2500 HD | 6 Speed Trans. | Bore: 18 mm | |
| 2003 | GMC | Sierra 3500 | 6 Speed Trans. | Bore: 18 mm | |
| 2002 | Chevrolet | Silverado 2500 HD | 6 Speed Trans. | Bore: 18 mm | |
| 2002 | Chevrolet | Silverado 3500 | 6 Speed Trans. | Bore: 18 mm | |
| 2002 | GMC | Sierra 2500 HD | 6 Speed Trans. | Bore: 18 mm | |
| 2002 | GMC | Sierra 3500 | 6 Speed Trans. | Bore: 18 mm | |
| 2001 | Chevrolet | Silverado 2500 HD | V8 403 6.6L (6599cc) | Bore: 18 mm | |
| 2001 | Chevrolet | Silverado 2500 HD | V8 496 8.1L | Bore: 18 mm | |
| 2001 | Chevrolet | Silverado 3500 | V8 403 6.6L (6599cc) | Bore: 18 mm | |
| 2001 | Chevrolet | Silverado 3500 | V8 496 8.1L | Bore: 18 mm | |
| 2001 | GMC | Sierra 2500 HD | V8 403 6.6L (6599cc) | Bore: 18 mm | |
| 2001 | GMC | Sierra 2500 HD | V8 496 8.1L | Bore: 18 mm | |
| 2001 | GMC | Sierra 3500 | V8 403 6.6L (6599cc) | Bore: 18 mm | |
| 2001 | GMC | Sierra 3500 | V8 496 8.1L | Bore: 18 mm |
Product Specifications
| Inside Diameter: | 18 mm |
|---|---|
| Item Grade: | Regular |
| Package Contents: | Clutch Master Cylinder |
| Package Quantity: | 1 |
| Packaging Type: | Box |
OE Numbers
| DIRECT OE CROSS | |
|---|---|
| 12572216 | GENERAL MOTORS |
| 12572805 | GENERAL MOTORS |
| 12573372 | GENERAL MOTORS |