This part is a valve, brake combination (mounted on vacuum cylinder in front of master cylinder) (brass), for Chevrolet Trucks, and GMC Trucks cars. It for Chevrolet Trucks LLV (Postal Vehicle), S10 Blazer 2WD, S10 Pickup 2WD, S10 Blazer 4WD, and S10 Pickup 4WD, GMC Trucks LLV (Postal Vehicle), S15 Jimmy 2WD, S15 Pickup 2WD, S15 Jimmy 4WD, and S15 Pickup 4WD for the U.S. from 1982 to 1993. .
