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It depends on the year and wether you have digital or manual air
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∙ 14y ago
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2006 gmc envoy Denali will not blow air out of main dash vents anyone know what the cause may be?
The mode door actuator has gone out. www.trailvoy.com
What is Mode door actuator?
It controls which vent the air comes out of.
What is a mode door actuator?
It controls which vent the air comes out of.
Where is Chevy Trailblazer Vent Control Solenoid?
It's called the mode door actuator and it is up in the vent system.
Could the control head cause air flow to the feet only on a 2004 Chevy trailblazer?
This is a failure of the mode door actuator in the venting system. We have instructions in our enthusiasts forum on how to change it out. www.trailvoy.com
Why with the AC on does the 2002 gmc envoy blow cold air through the passanger side vent while hot air blows through the drivers side vent?
I recently had my battery replaced when I noticed the same thing happen to me. I replaced one mode door actuator with no change. I think the head unit needs to be reprogrammed at the factory for my issue. I'll write back after I try this.
What would cause a knocking sound behind the glove box on a Chevy Trailblazer?
Only one thing there. The blower motor for the heating and AC. Turn it off and see if it still happens. A constant faint clicking sound may indicate a failing mode door actuator. If the blower does not seem like the issue and change in frequency of clicks with the speed setting then the mode door actuator and an inability to select air flow may be your problem. www.trailvoy.com
Why does AC only come out on the floor in a 1998 Intrigue?
The control head (less likely) or the mode door actuator (more likely) has given up.
04 Chevy trailblazer why don't defrost and floor vents work but not face vents?
The mode door actuator has failed. We have instructions for repair at www.trailvoy.com
Air vents don't blow out on 2002 Chevrolet trailblazer?
Could be the mode door actuator. For more info visit our enthusiasts forum at www.trailvoy.com
Why does rear heat only blow cold in 1999 Ford Expedition not work?
90% of the time it is the temp mode door actuator located in the driverside rear of the truck
My 2004 trailblazer air don't blow out of the vents only the top and the bottom vents?
Probably the mode door actuator. We have instructions on the replacement procedure on our enthusiasts forum at www.trailvoy.com
