OER Parts offers a wide selection of Heater Parts for your 1999 Buick All Models. OER Parts offers 1999 Buick All Models Expansion Valve, 1999 Buick All Models Hose Clamps, 1999 Buick All Models Hose Fittings, 1999 Buick All Models Hoses and Lines, 1999 Buick All Models Vent and Duct Parts.