HVAC Mode Door Actuator. HVAC Actuator. 2001 GMC Sierra 3500 6.0L V8; Actuator; Mode Valve;. 2001 GMC Sierra 3500 6.6L V8; Actuator; Mode Valve;. 2001 GMC Sierra 3500 8.1L V8; Actuator; Mode Valve;. 2002 GMC Sierra 3500 6.0L V8; Actuator; Mode Valve;.
