GMPartsGiant.com offers the wholesale prices for genuine 1989 Chevrolet Suburban R1500 parts. Parts like Emission Controls Wiring Harness 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. Model Code: 1/2 TON.