GMC 12375588 Cylinder Kit,Clutch Master

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Before starting the procedure, it's advisable to check with local parts stores and dealer service departments to determine whether purchasing a rebuild kit or a new master cylinder is more suitable based on parts availability and cost.

Depending on the model year, you should remove the hydraulic line from the master cylinder, detach the release cylinder from the transmission, or remove the hydraulic line from the release cylinder using a special tool for 1996 and later models. For 1988 through 1992 models, remove the two nuts securing the master cylinder to the firewall and extract the cylinder. For 1993 through 1995 models, remove the nuts and brackets retaining the tubing to the firewall, and remove the master cylinder, release cylinder, and tubing as one unit. For 1996 and later models, rotate the master cylinder 45 degrees clockwise and remove it from the firewall with the tubing attached.