mode actuator location and installation instructions needed

2007 CHEVROLET TRAILBLAZER
172,000 MILES • V6 • 4WD • AUTOMATIC
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BRENDA DAY
  • MEMBER
  • 3 POSTS
my air does not bow out front vent.s we have a mode actuator but do not know where it goes and how to get there.
Jul 1, 2021 at 9:59 PM
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JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
Hi,

The mode door actuator is located under the dash on the left side of the HVAC box.

If you look below, I attached the directions and pics for replacement specific to this vehicle. I am basing this on a manual temp control system. If the vehicle has automatic temp control, let me know.

The last two pics are the recalibration procedure. One way is with a scan tool and the other is without.

Let me know if this helps or if you have other questions.

Take care,

Joe

See pics below.
Jul 1, 2021 at 11:42 PM
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BRENDA DAY
  • MEMBER
  • 3 POSTS
my 2007 Trailblazer is dual climate control you can set drivers side and passenger side is this manual or automatic.
Jul 4, 2021 at 11:11 AM
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JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
That sounds like it is manual. Automatic functions like a thermostat in your house. You set a temperature and it maintains that temperature. Dual climate is on both designs.

Let me know.

Joe
Jul 4, 2021 at 8:39 PM