Luk LMC129 Clutch Master Cylinder

LuK LMC129 Clutch Master Cylinder

The LuK LMC129 clutch master cylinder is a hydraulic replacement for manual transmission systems on select Chevrolet and GMC trucks and SUVs from 1992-1995. Built with an aluminum body and supplied with a reservoir, push rod, and installation instructions, it supports consistent clutch pedal hydraulic pressure for direct OE-style service.

Key Features

• Aluminum construction for durable hydraulic clutch service
• Female connector gender for listed vehicle applications
• Includes push rod and reservoir
• New part with installation instructions included
• Without clutch slave cylinder
• Not pre-filled and not pre-bled

Application Details

Compatible with 1992-1995 Chevrolet C1500, C2500, C3500, K1500, K2500, K3500, Blazer, and 1995 Tahoe, plus 1992-1995 GMC C1500, C2500, C3500, K1500, K2500, K3500, Yukon, and Suburban models listed in the fitment data. This part cross-references Dorman - First Stop CM126856 and Valeo 5493080 for the same application. The LuK LMC129 is also referenced by part number LMC129 for ordering and catalog lookup.

LuK has been a key name in the transition from mechanical to hydraulic clutch release systems, and Schaeffler’s experience in complete clutch release systems is reflected in this replacement master cylinder. For 1995 GMC C1500 Suburban, C2500 Suburban, K1500 Suburban, K2500 Suburban, and Yukon applications, verify the specified pushrod length noted in the fitment data. Some Chevrolet truck applications also reference LB135 or LB177 service notes for squeak, hard pedal, or noise-related concerns.

Common Problems This Part Can Address

• Clutch pedal that feels soft or inconsistent
• Hydraulic fluid loss at the master cylinder
• Difficulty disengaging the clutch
• Pedal travel issues caused by worn internal seals
• Noise or binding related to a failing clutch master cylinder

Installation Notes

• Bleed the hydraulic system after installation because this unit is not pre-bled.
• Fill with the correct clutch hydraulic fluid before service.
• Confirm push rod length and pedal connection before installation on Suburban and Yukon applications.
• Follow the included installation instructions for proper setup.
• Inspect the slave cylinder and hydraulic line condition before reassembly.

Quality Assurance

LuK and Schaeffler bring extensive experience in hydraulic clutch release systems, and this new replacement master cylinder is built for the listed manual transmission applications. The aluminum construction, included reservoir, and application-specific hardware details support accurate service on compatible Chevrolet and GMC vehicles.