GMPartsGiant.com offers the wholesale prices for genuine 1999 GMC Suburban K2500 parts. Parts like Brake Master Cylinder are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 8 Cyl 5.7L, 8 Cyl 6.5L Diesel, 8 Cyl 7.4L. Model Code: 3/4 TON.