1991 GMC K3500 w/o A/C;. Part Type: HVAC Heater Core. Heater Core. Aluminum Heater Core. Type: Heater Core /Aluminum. Style: Aluminum Heater Core. Compatible Years: 1991. Core Width: 6.375 In.
74701 4 Seasons HVAC Heater Control Valve-Heater Valve 4 Seasons 74701
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