will change over to the heat mode and the passenger vents will still be blowing ice cold. I can turn off engine and crank it right back up and this corrects problem----- for a little while. HELPI have a 2006 GMC pickup that has the dual climate control. When a/c is on sometimes the driver side vents?
what you have is a dual zone system, which means each side can operate independently from the other, so in essence each side has to have it's own motor to control the temperature door (these little motors are called ACTUATORS.
You need to replace the left side actuator,and it has to be calibrated after replacement.
replacement is easy for the left side, (about 10-15 minutes)but unfortunately the part is expensive.I have a 2006 GMC pickup that has the dual climate control. When a/c is on sometimes the driver side vents?
vacuum leak somewhere
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