REPLACE PART NUMBER: 172-2069, 15606198. Located between the master cylinder and the rest of the brake system, the brake proportioning valve is key to reliable brake system operation. COMPATIBLE WITH: Chevy GMC truck C1500 C2500 C3500 K1500 K2500 K3500, model year 1989,1990, 1991, 1992, 1993, 1994. INSTALLATION: this is a direct replacement for the original part. The connector can be calibrated without cutting or splicing. HIGH QUALITY: Quality materials & advanced technology used, meets or exceeds OEM standards. High-quality aluminum material is used to ensure product safety, stability and durability.