/live/media/DB/DB_CM640037_Fro.jpg)
Dorman CM640037 Clutch Master Cylinder
| Brand | Dorman CM640037 |
|---|---|
| Bore Diameter | 18 |
| Item Grade | Standard Replacement |
| Package Contents | Clutch Master Cylinder |
| Fits | Chevrolet and GMC · 28 vehicles |
Direct replacement. Precision-engineered to match the original equipment design.
Standard replacement. A clutch master cylinder for dependable hydraulic operation.
Cross-references AMS Automotive M0447, Centric Parts 136.66012 and LuK LMC408 for the same application. See all 8.
Dorman CM640037 Clutch Master Cylinder
Restore clutch hydraulic performance with this direct replacement clutch master cylinder from Dorman. Built to match the original equipment design for specific applications, it is made for 18 mm bore fitment and is a standard replacement for manual transmission service.
Key Features
- Direct replacement clutch master cylinder for OE-style fitment
- 18 mm bore diameter for the specified applications
- Standard replacement grade for routine repair work
- Designed for 2001-2006 Chevrolet Silverado 2500 HD and Silverado 3500
- Designed for 2001-2006 GMC Sierra 2500 HD and Sierra 3500
- Part number CM640037 for easy identification
Detailed Description
Dorman CM640037 is a clutch master cylinder engineered to match the original equipment design in select Chevrolet Silverado and GMC Sierra heavy-duty manual transmission applications. It is specified with an 18 mm bore diameter, making it the correct replacement for vehicles that require that bore size. If you are searching for a clutch master cylinder for 2001-2006 Chevrolet Silverado 2500 HD, 2001-2006 Chevrolet Silverado 3500, 2001-2006 GMC Sierra 2500 HD, or 2001-2006 GMC Sierra 3500, this part number CM640037 is built for those exact fitments.
This part cross-references LuK LMC408 for the same application.
What It Helps Fix
- Clutch fluid leakage from a worn master cylinder
- Soft or inconsistent clutch pedal feel
- Difficulty disengaging the clutch during shifting
- Loss of hydraulic pressure in the clutch system
- Hydraulic clutch operation problems tied to internal cylinder wear
Installation Notes and Tips
Verify the bore diameter before installation and confirm the vehicle is equipped with the correct manual transmission clutch hydraulic setup. Compare the original unit to Dorman CM640037 to confirm line connection style, mounting points, and application match. After installation, bleed the clutch hydraulic system thoroughly to remove trapped air and restore pedal consistency.
Quality Assurance
Dorman manufactures this clutch master cylinder as a direct replacement part for specific vehicle years, makes, and models. The OE-style design focus supports accurate fitment for the listed Chevrolet Silverado and GMC Sierra applications.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2006 | Chevrolet | Silverado 2500 HD | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2006 | Chevrolet | Silverado 3500 | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2006 | GMC | Sierra 2500 HD | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2006 | GMC | Sierra 3500 | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2005 | Chevrolet | Silverado 2500 HD | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2005 | Chevrolet | Silverado 3500 | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2005 | GMC | Sierra 2500 HD | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2005 | GMC | Sierra 3500 | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2004 | Chevrolet | Silverado 2500 HD | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2004 | Chevrolet | Silverado 3500 | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2004 | GMC | Sierra 2500 HD | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2004 | GMC | Sierra 3500 | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2003 | Chevrolet | Silverado 2500 HD | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2003 | Chevrolet | Silverado 3500 | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2003 | GMC | Sierra 2500 HD | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2003 | GMC | Sierra 3500 | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2002 | Chevrolet | Silverado 2500 HD | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2002 | Chevrolet | Silverado 3500 | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2002 | GMC | Sierra 2500 HD | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2002 | GMC | Sierra 3500 | — | — | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2001 | Chevrolet | Silverado 2500 HD | 6.6L | V8 | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2001 | Chevrolet | Silverado 2500 HD | 8.1L | V8 | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2001 | Chevrolet | Silverado 3500 | 6.6L | V8 | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2001 | Chevrolet | Silverado 3500 | 8.1L | V8 | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2001 | GMC | Sierra 2500 HD | 6.6L | V8 | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2001 | GMC | Sierra 2500 HD | 8.1L | V8 | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2001 | GMC | Sierra 3500 | 6.6L | V8 | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| 2001 | GMC | Sierra 3500 | 8.1L | V8 | N/A | Clutch Master Cylinder fits 18 mm bore size. |
| No rows match your filter. | ||||||