Chevy Silverado Hydraulic Clutch Line 628-105

This is the hydraulic line that carries fluid from the clutch master cylinder on the firewall to the slave cylinder on the transmission, for manual-transmission GM full-size trucks. It replaces 628-105, CM350088 and GM 15727261. The listed fitment is 1996-2002 Chevrolet and GMC C1500, C2500, C3500, K1500, K2500 and K3500 pickups, the 1999 Silverado 1500, and the 1996 Tahoe and Yukon. It has a braided section at the master cylinder end and a formed black line with routing clips, and comes with the retaining pin and rubber grommet shown.

On these trucks the original line runs close to the exhaust, and a line that has gotten hot or rubbed through will leak at the crimp or the quick-connect end. The owner usually notices the pedal going soft and the reservoir dropping with no obvious drip, then fluid shows up on the frame rail or bellhousing.

Signs the clutch hydraulics are failing: the pedal sinks slowly to the floor or stays down, the pedal feels soft or spongy, the reservoir level keeps dropping, brake fluid is wet on the firewall, the frame rail or the bottom of the bellhousing, or the truck grinds going into gear because the clutch no longer releases all the way. If bleeding brings the pedal back for a day and then it goes soft again, a seal is leaking and the part needs replacing, not more bleeding.

To install, route the new line along the same path as the old one and keep it clipped away from the exhaust. Seat the slave cylinder end fully and install the retaining pin, then connect the master cylinder end. Bleed the system until the pedal is firm and returns all the way, and check both connections for seepage with the pedal held down.