OEM INTERCHANGE PART NUMBER 1: 15706056. Replaces Part Numbers & Specifications PRODUCT TYPE: BRAKE BOOSTER. SILVERADO 2500 LS 8 CYL 6.0L 1999-2002 WITH HYDRO-BOOST, WITHOUT MASTER CYLINDER. SILVERADO 1500 LS 8 CYL 5.3L 2000-2002 WITH HYDRO-BOOST, WITHOUT MASTER CYLINDER.
