my heater on a 2004 silverado LS on 2004 Chevrolet Silverado 1500 HD

when i turn on the heat is blows cold air on driver side and hot air on passenger side what do i need to do to fix it

1 answer 4 comments
Replace the lower temp/blend door actuator.
thank you very much and where would that actuator be located under the dash
The bottom right of center, at the hump.
Thanks for the help. I replaced the actuator and that fixed the problem thank you very much for your help. ROB RODEN
Don't plug it in until it has been installed first.