1990 Kenworth C550 OE No. K301239; RD545830; RD545850; RD535950;. 1991 Kenworth C550 OE No. 1992 Kenworth C550 OE No. 1993 Kenworth C550 OE No. 1994 Kenworth C550 OE No. Part Type: HVAC Pressure Switch.
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