When I have pn the heat there is cold air blowing on the passenger side floor. Looking for suggestions on where to start troubleshooting

 

Happy Thanksgiving and welcome to Chevy. Please post your vehicle details so smart folks can help you

 

Sorry, I have a 2000 Silverado 1500 Ext Cab

 

Does yours have the dual controls, with a separate temp for the passenger side, like my 2006? If so, I imagine the blend door actuator is gone on the passenger side, and it is open to cold outside air rather than heat.

 

Hello. No I do not have dual control.