Checking Hydraulic Clutch System

Clutch hydraulic system malfunctions can be verified by measuring travel of clutch slave cylinder push rod. On "C" and "K" Series Blazer and Pickup, Sierra, Suburban and Yukon, slave cylinder push rod travel at clutch fork should be at least 1" (25.4 mm) with clutch pedal pressed fully to floor stop.

On "S" and "T" Series Blazer and Pickup, Jimmy and Sonoma, slave cylinder push rod travel at clutch fork should be at least .75" (19 mm) with clutch pedal pressed fully to floor stop.

On Commercial Van, slave cylinder push rod travel at clutch fork should be at least 1.338" (34 mm) with clutch pedal pressed fully to floor stop. If slave cylinder push rod travel is not as specified, check reservoir fluid level. If fluid level is low, check hoses for cracks, wear or other damage. Check hydraulic cylinders for loose mounting and signs of leakage. Fill reservoir with fluid. Refer to RECOMMENDED FLUID  table under LUBRICATION. If necessary, bleed hydraulic system. See BLEEDING HYDRAULIC CLUTCH SYSTEM . Repair or replace clutch hydraulic system if fluid leakage is excessive.