Clutch Master Cylinder for Chevy C/K & GMC Sierra Truck – 15049053

What Is a Clutch Master Cylinder — and Why Does It Matter on a Work Truck?
The clutch master cylinder sits at the top of the hydraulic clutch circuit. Press the clutch pedal, and this cylinder pushes brake fluid through the line to the slave cylinder, which then disengages the clutch disc from the flywheel. Release the pedal, and the clutch re-engages so power flows from the engine to the drivetrain.
On a full-size truck like the C/K series, this part takes considerably more abuse than on a passenger car. Towing, hauling, and frequent gear changes under load accelerate wear on every component in the clutch system — the master cylinder included. When it starts to go, drivers notice a pedal that won't fully return, a clutch that slips under load, or fluid loss at the firewall. Left unaddressed, a failing master cylinder can leave a truck immobile mid-job.
CM241 is a direct-fit replacement built to OE dimensional specifications for this platform.

Twenty-five references across GM OE and major aftermarket brands — all confirmed fits for CM241. For distributors managing North American truck parts catalogs, this density of cross-references is a practical advantage. A buyer searching any one of these numbers lands on the same stocking requirement. Consolidating them under a single supplier reduces order fragmentation and makes replenishment straightforward.
The C/K platform spans a 24-year production window, which means these OE numbers appear across multiple catalog generations. Matching all of them to one aftermarket SKU is exactly the kind of catalog work that reduces sourcing overhead for high-volume distributors.

The C/K Truck Market — Why This SKU Has Staying Power
The Chevrolet C/K and GMC Sierra/Suburban trucks built between 1996 and 2020 represent one of the largest vehicle populations in the North American aftermarket. These were — and remain — the default choice for contractors, ranchers, municipalities, and fleet operators across the US, Canada, and export markets in Central and South America.
Unlike passenger cars that depreciate out of active use, work trucks stay in service for well over a decade. A C1500 registered in 1999 may still be on a job site today. The aftermarket demand for these platforms is not declining — it's structural. Workshops that service working trucks keep these parts on the shelf because the vehicles don't age out of the market the way consumer cars do.
Manual transmission variants in this series — where the clutch master cylinder is a direct wear component — were popular across all three payload ratings. Fleet buyers, particularly in agriculture, construction, and municipal services, favored the C2500 and K2500 configurations for their payload capacity and durability.

Q: Why are there so many OE numbers for one part?
GM updated part numbers several times across the C/K production run as supplier contracts and internal specifications changed. The underlying fitment remained consistent. All seven GM OE numbers listed here cross to the same application.

Q: Does CM241 cover both 2WD (C-series) and 4WD (K-series) trucks?
Yes. The clutch master cylinder is common across both drive configurations on this platform. The C and K designations refer to drivetrain, not clutch system differences.

Q: Is this compatible with the Suburban variants?
Yes — the C1500 Suburban, C2500 Suburban, K1500 Suburban, and K2500 Suburban are all confirmed fitments.