EXEDY OEM MC309 Clutch Master Cylinder

EXEDY OEM MC309 Clutch Master Cylinder

The EXEDY OEM MC309 clutch master cylinder is an OE-style hydraulic replacement for manual transmission Chevrolet and GMC trucks, vans, and SUVs from 1982-1991. It is built for direct-fit service on a wide range of 10-spline applications, including Chevrolet Blazer, C/K Series, and GMC Jimmy models.

Key Features

• EXEDY OEM clutch master cylinder for manual transmission hydraulic systems
• Part number MC309 for accurate ordering and catalog matching
• OE-style replacement for Chevrolet and GMC applications
• Fits 1982-1991 vehicles listed below with 10-spline configurations
• Coverage includes Blazer, Jimmy, C/K trucks, Suburban, and van platforms

Detailed Description

EXEDY OEM MC309 is a clutch master cylinder for manual transmission vehicles that use hydraulic clutch actuation. This part number is listed for 1982-1991 Chevrolet and GMC applications, including Chevrolet Blazer, GMC Jimmy, Chevrolet C10/C20/C30, K10/K20/K30, and related Suburban and van models. Fitment notes vary by vehicle and clutch setup, so matching the year, model, and clutch configuration is important when selecting the correct replacement.

This part cross-references OE-style replacement listings for the same application. The MC309 designation helps simplify lookup when servicing Chevrolet and GMC manual transmission clutch hydraulics.

Vehicle Fitment

• Fits 1991 Chevrolet Blazer, N/A — 11" Disc, To 1/31/91; 10 Spline
• Fits 1987-1990 Chevrolet Blazer, N/A — 11" Disc; 10 Spline
• Fits 1985-1986 Chevrolet C10, N/A — 11" Disc; 10 Spline
• Fits 1983-1984 Chevrolet C10, N/A — 11-7/8" Disc; 10 Spline
• Fits 1985-1986 Chevrolet C10 Suburban, N/A — 11" Disc; 10 Spline
• Fits 1982-1984 Chevrolet C10 Suburban, N/A — 11-7/8" Disc; 10 Spline
• Fits 1985-1986 Chevrolet C20, N/A — 11" Disc; 10 Spline
• Fits 1982-1984 Chevrolet C20, N/A — 11-7/8" Disc; 10 Spline
• Fits 1985-1986 Chevrolet C20 Suburban, N/A — 11" Disc; 10 Spline
• Fits 1982-1984 Chevrolet C20 Suburban, N/A — 11-7/8" Disc; 10 Spline
• Fits 1985-1986 Chevrolet C30, N/A — 11" Disc; 10 Spline
• Fits 1982-1984 Chevrolet C30, N/A — 11-7/8" Disc; 10 Spline
• Fits 1985-1986 Chevrolet K10, N/A — 11" Disc; 10 Spline
• Fits 1982-1984 Chevrolet K10, N/A — 11-7/8" Disc; 10 Spline
• Fits 1985-1986 Chevrolet K10 Suburban, N/A — 11" Disc; 10 Spline
• Fits 1982-1984 Chevrolet K10 Suburban, N/A — 11-7/8" Disc; 10 Spline
• Fits 1985-1986 Chevrolet K20, N/A — 11" Disc; 10 Spline
• Fits 1982-1984 Chevrolet K20, N/A — 11-7/8" Disc; 10 Spline
• Fits 1985-1986 Chevrolet K20 Suburban, N/A — 11" Disc; 10 Spline
• Fits 1982-1984 Chevrolet K20 Suburban, N/A — 11-7/8" Disc; 10 Spline
• Fits 1985-1986 Chevrolet K30, N/A — 11" Disc; 10 Spline
• Fits 1982-1984 Chevrolet K30, N/A — 11-7/8" Disc; 10 Spline
• Fits 1985-1986 Chevrolet K5 Blazer, N/A — 11" Disc; 10 Spline
• Fits 1988-1989 Chevrolet S10, N/A — 11" Disc; 10 Spline
• Fits 1988-1989 Chevrolet S10 Blazer, N/A — 11" Disc; 10 Spline
• Fits 1987 Chevrolet R10, N/A — 11" Disc; 10 Spline
• Fits 1987 Chevrolet R10 Suburban, N/A — 11" Disc; 10 Spline
• Fits 1987-1988 Chevrolet R20, N/A — R & V Series; 11" Disc; 10 Spline
• Fits 1987 Chevrolet R20 Suburban, N/A — 11" Disc; 10 Spline
• Fits 1987-1988 Chevrolet R30, N/A — R & V Series; 11" Disc; 10 Spline
• Fits 1988 Chevrolet R10 Suburban, N/A — 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1988 Chevrolet R20 Suburban, N/A — 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1989 Chevrolet R2500, N/A — 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1989 Chevrolet R3500, N/A — 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1990 Chevrolet R3500, N/A — R & V Series Pre-Damped; 11-7/8" Disc; 10 Spline
• Fits 1991 Chevrolet R3500, N/A — R & V Series ; 11-7/8" Disc; 10 Spline
• Fits 1987 Chevrolet V10, N/A — 11" Disc; 10 Spline
• Fits 1987 Chevrolet V10 Suburban, N/A — 11" Disc; 10 Spline
• Fits 1987 Chevrolet V20, N/A — R & V Series; 11" Disc; 10 Spline
• Fits 1987 Chevrolet V20 Suburban, N/A — 11" Disc; 10 Spline
• Fits 1988 Chevrolet V10 Suburban, N/A — 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1988 Chevrolet V20 Suburban, N/A — 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1988 Chevrolet V30, N/A — R & V Series; 11" Disc; 10 Spline
• Fits 1989-1991 Chevrolet V1500 Suburban, N/A — 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1989-1991 Chevrolet V2500 Suburban, N/A — 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1989-1991 Chevrolet V3500, N/A — 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1985-1986 GMC C1500, N/A — 11" Disc; 10 Spline
• Fits 1985-1986 GMC C1500 Suburban, N/A — 11" Disc; 10 Spline
• Fits 1985-1986 GMC C2500, N/A — 11" Disc; 10 Spline
• Fits 1985-1986 GMC C2500 Suburban, N/A — 11" Disc; 10 Spline
• Fits 1985-1986 GMC C3500, N/A — 11" Disc; 10 Spline
• Fits 1985-1986 GMC G1500, N/A — 11" Disc; 10 Spline
• Fits 1987 GMC G1500, N/A — 12" Diaph Clutch, Non-Pre Damped; 11-3/4" Disc; 10 Spline
• Fits 1985-1986 GMC G2500, N/A — 11" Disc; 10 Spline
• Fits 1987 GMC G2500, N/A — 12" Diaph Clutch, Non-Pre Damped; 11-3/4" Disc; 10 Spline
• Fits 1985-1986 GMC G3500, N/A — 11" Disc; 10 Spline
• Fits 1987 GMC G3500, N/A — 12" Diaph Clutch, Non-Pre Damped; 11-3/4" Disc; 10 Spline
• Fits 1991 GMC Jimmy, N/A — 11" Disc To 1/31/91; 10 Spline
• Fits 1985-1987 GMC Jimmy, N/A — 11" Disc; 10 Spline
• Fits 1987 GMC R1500, N/A — R & V Series; 11" Disc; 10 Spline
• Fits 1987 GMC R1500 Suburban, N/A — R&V Series; 11" Disc; 10 Spline
• Fits 1988-1991 GMC R1500 Suburban, N/A — R&V Series 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1987-1988 GMC R2500, N/A — R & V Series; 11" Disc; 10 Spline
• Fits 1988 GMC R2500, N/A — R&V Series; 11" Disc; 10 Spline
• Fits 1989 GMC R2500, N/A — R&V Series 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1987-1988 GMC R3500, N/A — R & V Series; 11" Disc; 10 Spline
• Fits 1989-1991 GMC R3500, N/A — R&V Series 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1987 GMC V1500, N/A — R & V Series; 11" Disc; 10 Spline
• Fits 1987-1990 GMC V1500 Suburban, N/A — R&V Series 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1987 GMC V2500, N/A — R&V Series; 11" Disc; 10 Spline
• Fits 1987-1990 GMC V2500 Suburban, N/A — R&V Series 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1987-1988 GMC V3500, N/A — R & V Series; 11" Disc; 10 Spline
• Fits 1989-1990 GMC V3500, N/A — R&V Series 12" Diaph Clutch with Ceramic Button; 11-3/4" Disc; 10 Spline
• Fits 1991 GMC C1500, N/A — 11" Disc To 1/31/91; 10 Spline
• Fits 1991 GMC C2500, N/A — 11" Disc To 1/31/91; 10 Spline
• Fits 1991 GMC C3500, N/A — 11" Disc To 1/31/91; 10 Spline

Installation Notes and Tips

• Verify the year, make, model, and clutch configuration before ordering.
• Match the clutch disc size and spline count listed in the fitment notes.
• Confirm whether the vehicle uses an R & V Series setup, a ceramic button clutch, or a non-pre-damped arrangement.
• Inspect the hydraulic system for wear or contamination before installing the replacement master cylinder.
• Bleed the clutch hydraulic system after installation to restore proper pedal feel and engagement.

Quality Assurance

EXEDY OEM supplies OE-style clutch components for manual transmission service. MC309 is cataloged as a direct replacement master cylinder for the listed Chevrolet and GMC applications, with fitment tied to the original clutch system configuration.