1988 Peterbilt 375. 1989 Peterbilt 375. 1990 Peterbilt 375. 1991 Peterbilt 375. 1992 Peterbilt 375. 1993 Peterbilt 375. Part Type: HVAC Heater Core. Heater Core.
74701 4 Seasons HVAC Heater Control Valve-Heater Valve 4 Seasons 74701
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