Hummer 24249143 Cylinder Assembly, Clutch Master

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Brake fluid will damage paint. Cover all body parts and be careful not to spill fluid during this procedure. Disconnect the cable from the negative terminal of the battery. Note: Obtain a new plastic master cylinder rod retainer clip before beginning the procedure. Remove the left-side under-dash panel and the heater/air conditioning duct behind it. Disconnect the electrical connector from the clutch pedal position switch. Detach the pushrod from the pedal by using a flat-bladed tool to pop the plastic retainer off. Raise the front of the vehicle and support it securely on jackstands. Disconnect the hydraulic line from the clutch release cylinder where it enters the transmission. A special tool, available at most auto parts stores, is required to separate the line fitting. Open the hood and find the clutch master cylinder-it's located on the firewall, to the left of the brake master cylinder. Grasp the body of the master cylinder and twist it 45-degrees clockwise to unlock it from the firewall. Detach the hydraulic line from any clips which may be securing it, then remove the master cylinder and line from the vehicle. Installation is the reverse of removal. A new plastic retainer should be installed when reconnecting the pushrod to the clutch pedal. Check the fluid level in the reservoir, adding as necessary to bring it to the appropriate level. Bleed the system.