Why are the vents not working on my GMC Envoy?

Why are the vents not working on my GMC Envoy?

2006 GMC Envoy upper AC vents not blowing air. Only the lower vents and the windshield blower working.

Where is the air conditioning unit on a GMC Envoy?

You have to remove the sound panel (two screws) under the glove box and remove the glove box at the hinge (three screws). Then you can see the module. It has a pigtail wire that plugs into the blower. Release the plug latch with a screw driver and disconnect it.

Is there a blower resister on a GMC Envoy?

Hi yes i have a 2004 GMC Envoy and that also happened to mine my air works fine up until you turn the dial to 5 its actually your Resister (which controls the fan speeds) a Blower Resister and you usually can only get it at the dealer.

What is code b0263 on GMC Envoy?

This 2003 GMC Envoy came in with the complaint that the a/c will only blow out the defrost and floor. Not through the dash vents. I checked codes and found a code B0263 for a fault with the mode actuator. I first ran into this problem after changing a battery in one of these vehicles last year.

Why are the vents not working on my GMC Acadia?

No effect. The blower doesn’t have any obvious damage and the front floor and rear vents work fine. Is it likely the blend door actuator pictured that’s bad?

Why are the vents on my front dash not working?

Reason being.. the air passes by the evaporator coil too fast and the moisture in the air is not properly collected. See the evaporator coil is on the positive side of the system not the negative.. so if a fan is set at full tilt it will push the water moloclues thru.

2006 GMC Envoy upper AC vents not blowing air. Only the lower vents and the windshield blower working.

This 2003 GMC Envoy came in with the complaint that the a/c will only blow out the defrost and floor. Not through the dash vents. I checked codes and found a code B0263 for a fault with the mode actuator. I first ran into this problem after changing a battery in one of these vehicles last year.

Why are the vents not working on my Chevy Trailblazer?

When I reconnected the battery the AC controller recalibrated itself and everything worked fine. Later I replaced the car’s (05 Trailblazer) battery and the top vents quit working. According to the schematics I had, this was due to the mode control door not working right.

How did I Fix my Chevrolet TrailBlazer air conditioner?

Heard the calibration take place behind the A/C controller for about a minute. Once it was quieted, started the ignition and the A/C was working perfectly again!! This fix probably saved me over $400.00 in unnecessary mechanic repairs.

When I reconnected the battery the AC controller recalibrated itself and everything worked fine. Later I replaced the car’s (05 Trailblazer) battery and the top vents quit working. According to the schematics I had, this was due to the mode control door not working right.

How do you know if your GMC truck battery is dead?

One by one, pull each fuse in your fuse box. Check the multimeter after each fuse pull to see when the amperage draw goes away. Once you find the fuse that causes the amperage draw to go away, you at least know what circuit the draw is coming from.

How to drain a battery on a GMC Truck?

With key off, unhook your positive battery terminal. Put one multimeter lead on the battery terminal and the other on the positive cable. You’re basically making the multimeter part of the circuit. Set the meter to read amps. Now, since its being drained I assume you’ll see some kind of amperage draw.

Where are the vents on my GMC Sierra?

No output on dash face vents or defrost vents but floor works ok. I have tried the pulling the fuses both under hood and left of dash but that did not fix my problem.

Where does the air come from in a GMC Sierra?

This 2005 GMC Sierra came in with the complaint that the air will only flow from the defroster vents, regardless of where it is commanded to. This Sierra has auto a/c controls and no floor mounted center console.

Where is the mode actuator on a 1995 GMC c1500?

This 1995 GMC C1500 came in with the complaint that the air would blow from everywhere except the front vents. In using the controls, the air flow would adjust from the defrost to the floor. All other functions were okay as well. The mode actuator is located under the driver’s side of the dash, above the gas pedal.

Why does my car have no air in the vents?

Step 3 – A fan blower motor is controlled by either a switch in the passenger compartment or by a computer. If this fan motor is starting to fail it will cause the fan motor to run at a lower speed resulting in low air flow. To test this condition an amp meter is needed, connect the meter lead to the power wire of the fan motor.

What should I do if my GM fan won’t turn on?

Pull the negative battery cable and re-install, making sure it is very tight (also check the positive to make sure it is tight). See if this fixes the problem. Many of GM’s AC control heads have a built in reset feature that when power is removed and then applied it will go through a cycle that activates all the vent doors and mode doors.

This 1995 GMC C1500 came in with the complaint that the air would blow from everywhere except the front vents. In using the controls, the air flow would adjust from the defrost to the floor. All other functions were okay as well. The mode actuator is located under the driver’s side of the dash, above the gas pedal.

Step 3 – A fan blower motor is controlled by either a switch in the passenger compartment or by a computer. If this fan motor is starting to fail it will cause the fan motor to run at a lower speed resulting in low air flow. To test this condition an amp meter is needed, connect the meter lead to the power wire of the fan motor.

Pull the negative battery cable and re-install, making sure it is very tight (also check the positive to make sure it is tight). See if this fixes the problem. Many of GM’s AC control heads have a built in reset feature that when power is removed and then applied it will go through a cycle that activates all the vent doors and mode doors.

Why is no air coming out of the top vents?

I changed the battery and the air stopped coming out of the top vents works only through the defrost vents and the floor. The inside climate adjustment always shows 50 degrees but when it’s rainy or humid it goes down into the negative numbers then shows on the dash ice possible.