When a hydraulic clutch goes soft, leaks, or won't fully disengage, the Dorman - First Stop Clutch Slave Cylinder CS37791 is the direct replacement for that part of the system. It receives fluid pressure from the clutch master cylinder and pushes the release mechanism to disengage the clutch when you press the pedal. This unit is a direct-fit replacement for a wide range of 1980s–1990s Chevrolet and GMC trucks and SUVs — including the 1987-1991 Chevrolet Blazer, 1985-1986 Chevrolet C10/C20/C30, 1984-1986 Chevrolet K10/K20/K30 and Suburban variants, and matching GMC models with the L6-4.1L, L6-4.8L, V6-4.3L, V8-5.0L, V8-5.7L, V8-6.2L, and V8-7.4L engines. See the Buyer's Guide tab for the full 182-application list.
Signs this part may need replacing include fluid leakage at the cylinder, a soft or sinking clutch pedal, and difficulty shifting. If a failed slave cylinder is the cause, this replaces it. Country of origin: China.
Interchange: 18F71 · 386-319 · 386319 · S0405 · 24-36005 · 2436005 · W909094 · S-82005 · S82005 · 12168 · 138.62005 · 13862005 · 139.62005 · 13962005 · SC103483 · 15537762 · 15615868 · LSC117 · 103483 · 2337791 · CS2221 · 37791 · SC37791 · SH6089 · F103483. Manufacturer part number CS37791.
This part cross-references / interchanges with the following part numbers:
What does the clutch slave cylinder do?
It receives hydraulic pressure from the clutch master cylinder and pushes the release mechanism to disengage the clutch when you press the pedal.
How do I know if my clutch slave cylinder is failing?
Common signs include fluid leaking at the cylinder, a soft or sinking clutch pedal, and trouble shifting gears. Diagnose the cause before replacing, as other parts can produce similar symptoms.
What fluid is used with this slave cylinder?
It includes high-grade rubber components made for compatibility with standard brake fluid. Follow the vehicle service information for the correct fluid specification.
Will this fit my vehicle?
It is a direct-fit replacement for many 1984-1991 Chevrolet and GMC trucks and SUVs across 182 applications. Check the Buyer's Guide tab to confirm your exact year, model, and engine.
What is the bore size of CS37791?
The inside diameter (bore) is 0.813 in.
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.