Luk CRS040 Clutch Master Cylinder and Line Assembly

Luk CRS040 Clutch Master Cylinder Assembly

The Luk CRS040 is a hydraulic clutch master cylinder and line assembly for manual transmission systems. It is built for 1999-2000 Chevrolet Silverado 1500, Silverado 2500, Sierra 1500, and Sierra 2500 applications listed below, with a clutch slave cylinder included for a complete hydraulic service solution.

By replacing a cable-actuated setup with a hydraulic release system, this assembly helps reduce cable friction and supports smoother clutch operation in tighter engine compartments. The CRS040 is a new part with a plastic reservoir, hose included, push rod included, and installation instructions included.

Key Features

• Brand: Luk
• Part number: CRS040
• Clutch master cylinder and line assembly for manual transmission components
• Includes clutch slave cylinder
• Plastic construction
• Reservoir included
• Hose included
• Push rod included
• Female connector gender
• Installation instructions included
• New part

Detailed Description

The Luk CRS040 hydraulic clutch master cylinder assembly is a direct-fit style replacement for select GM trucks with manual clutch systems. It is engineered for vehicles that use a foot-operated clutch and hydraulic release design, helping replace older cable-operated hardware with a smoother hydraulic setup. This part number is commonly searched as CRS040 clutch master cylinder assembly, Luk CRS040, and clutch master cylinder and line assembly for 1999-2000 Chevrolet Silverado 1500 and GMC Sierra 1500 applications.

This part cross-references Dorman - HELP 74040 for the same application. It also cross-references Dorman - First Stop CC649045 for the same application.

What It Helps Address

• Hard or inconsistent clutch pedal feel
• Wear related to cable-actuated clutch friction
• Hydraulic clutch line or master cylinder replacement needs
• Service on manual transmission clutch release systems
• Replacement for select 1999-2000 Chevrolet Silverado and GMC Sierra clutch hydraulic components

Installation Notes and Tips

Installation instructions are included. This assembly is not pre-filled and is not pre-bled, so the hydraulic system must be filled and bled after installation. The connector is female, and the unit includes a push rod and reservoir. Verify vehicle application carefully before installation, especially for 1999-2000 Chevrolet Silverado 1500, Silverado 2500, GMC Sierra 1500, and Sierra 2500 listings marked not compatible with slave cylinder.

• Fits 1999-2000 Chevrolet Silverado 1500, N/A
• Fits 1999-2000 Chevrolet Silverado 2500, N/A
• Fits 1999-2000 GMC Sierra 1500, N/A
• Fits 1999-2000 GMC Sierra 2500, N/A

Quality Assurance

Luk supplies hydraulic clutch components for manual transmission service applications, and this CRS040 assembly is a new replacement part built for the listed GM truck fitments. Confirm the vehicle’s clutch system configuration before ordering, since the fitment notes specify not compatible with slave cylinder for the listed Silverado and Sierra applications.