1989 Chevrolet R3500 w/ A/C;. 1990 Chevrolet R3500 w/ A/C;. 1991 Chevrolet R3500 w/ A/C;. Part Type: HVAC Heater Core. Heater Core. Aluminum Heater Core. Type: Heater Core /Aluminum. Style: Aluminum Heater Core.
74701 4 Seasons HVAC Heater Control Valve-Heater Valve 4 Seasons 74701
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