[Vehicle Fitment]: Compatible with Chevrolet C1500 1988-1991, C2500 1988-1991, C3500 1988-1991, C3500HD 1991, K1500 1988-1991, K2500 1988-1991, K3500 1988-1991; Compatible with GMC C1500 1991, C1500 1988-1990 (RWD), C2500 1988, C2500 1989 (RWD), C2500 1990-1991, C3500 1988-1991 (RWD), C3500HD 1991, K1500 1988-1991, K2500 1988-1991, K3500 1988-1991 --- It comes with Reservoir , [Reference Number]: CM116209, 15585414, 15585418, 15616090 We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind. [Advantages]: A-Premium clutch master cylinder is designed for quick response to pedal input, providing smooth and efficient clutch operation. 1988 Chevrolet C1500 Bore: 11/16 In.;. 1989 Chevrolet C1500 Bore: 11/16 In.;. Premium Quality Replacement] Clutch master cylinder designed for c1500 c2500 c3500 k1500 k2500 k3500, ensuring compatibility with specific models and oe numbers. verify fitment for your vehicle before purchase Clutch Master Cylinder For 1988-1991 Chevrolet C1500 Dorman Made of outstanding materials, our master cylinder delivers long-lasting performance and durability. 1988 Chevrolet C1500 Bore: 11/16 In.;. 1989 Chevrolet C1500 Bore: 11/16 In.;. 1991 Chevrolet C1500 Bore: 11/16 In.;. 1990 Chevrolet C1500 Bore: 11/16 In.;. Clutch Master Cylinder. Outlet Thread Size: M12 X 1.0 Slave Master Cylinder A-Premium Clutch Master Cylinder With Reservoir Compatible With Chevrolet C1500 C2500 C3500 K1500 K2500 K3500 1988-1991, C3500HD 1991 & GMC C1500 Master Cylinder Reservoir