GMPartsGiant.com offers the wholesale prices for genuine 1988 Chevrolet Suburban R20 parts. Parts like Emission Controls Vent Pipe, EFE Valve & Related Parts 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 6.2L Diesel, 8 Cyl 7.4L. Model Code: 3/4 TON.