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.

Why are the vents on my GMC Sierra stuck?

The most common symptom of course is lack of control over the vent output position and normally it will be stuck in the defroster only position. If it is not currently stuck in the defroster position but you are changing the actuator anyways. make sure that you set the vent position to defrost before starting this procedure. You will see why later.

What kind of fuse box does a GMC Jimmy have?

Alternator Field, VTC, A/C Compressor Relay, Cluster Chime Module, DRL Relay Coil, Four-Wheel Drive Indictor Lamp, DRL Module, Rear Defog Timer, TCCM Ignition, SIR Redundant Ignition, RKE Ignition

Where does the air come from in a GM blower?

As an example, if you select defrost, the mode door points all the air at the windshield. If you select heat, then the air will be directed at the floorboards. In the AC mode all of the air should come out of the air conditioning vents. If you select blend, then you’ll get air coming out of all of the positions.

Why is my GMC Sierra 1500 heater not working?

While there are a variety of reasons your GMC Sierra 1500 heater is not working, the most common 3 are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.

Is there a problem with the GM blower motor?

If you have a General Motors car or truck from 2002 through 2008 you’ll probably have a blower motor issue at some point. In many cases it’s a problem with the GM blower motor module. The most common complaint when this part fails is the motor will not turn on at all.

Why is my climate control not working on my GM Truck?

The malfunction of the rear climate control system on General Motors trucks and sport utility vehicles that have a separate rear HVAC system. The most common complaint is that the front air conditioning or heater unit performs as expected. However, the rear heat or air conditioning system has either intermittent or no operation.

What kind of climate control does a GMC Sierra have?

I have a 2004 GMC Sierra with dual climate control heating and AC. On occasions when I turn on the AC the passenger side 2004 GMC: AC..passenger side..the drivers side blows extremely hot air…

What kind of climate unit does a Silverado crew cab have?

2004 Chevrolet Silverado Crew Cab w/5.3 L Dual climate zone control unit blows cold ac on passenger side and hot air on driver side and rear When the A/C is on. Is this a bad control unit? … read more

Why does my GMC Sierra 1500 blow cold air?

The dash vents do not blow any air. It seems like a common problem. Im gonna go ahead and replace the mode actuator! A/C only cold on passenger side. Drivers side blows hot. There is no adjustment on the drivers side for temp. If you turn off the truck and then restart, it might work for a bit or not.

Where does the hot air come from on a Silverado Sierra?

I really don’t care about having air I just don’t enjoy burning up so summer because I can’t stop the scorching hot air coming out into the drivers side while the passenger side gets full AC Passenger side under the hood is the 2 hoses running back to firewall.

Why does my GMC Sierra 1500 not work?

While there are a variety of reasons your GMC Sierra 1500 air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor. What will be the outcome of an air conditioning system diagnosis?

Is there hot air on the driver’s side?

You’d have to be on the good side with a dealer to have them edit their costs system because you ripped it all apart. I would ask them though, as no one here can speak for them.

Where is the actuator motor on a GMC Sierra?

The goal is to leave the cam/cog in place on the end of the heater-a/c case and to remove the actuator motor only. The old assembly on the left and the new one on the right. Taking the new actuator motor and installing it on the old cam/cog.

Where can I buy a GMC Sierra a / C heater?

Shop AutoZone for GMC Sierra 1500 A/C Heater Blend Door Actuator. 10% OFF $75. Use Code: DIYSAVE10 Online Ship-to-Home Orders Only

What kind of air vent actuator do I Need?

Replacement air vent door Actuator controls the flow and temperature of air into the interior of the vehicle. Compatible for 1999-2012 Chevy Silverado 1500,Chevy Silverado 2500 HD Chevy Tahoe,GMC Sierra 1500,1997-2005 BUICK CENTURY,2002-2014 CADILLAC ESCALADE,1995-2003 OLDSMOBILE AURORA,2003-2009 HUMMERH2.

Where is the actuator located on a Chevy Silverado?

The actuator is located behind the airbag assembly, so it has to come out. This is extremely dangerous, and the air bag need to be handle delicately to avoid any accidental deployments. If you haven’t already, take the time to make sure the vehicle’s battery is not connected. Disable the airbag.

Shop AutoZone for GMC Sierra 1500 A/C Heater Blend Door Actuator. 10% OFF $75. Use Code: DIYSAVE10 Online Ship-to-Home Orders Only

Is there issue with auto climate control not changing from vent to vent?

Has anyone had an issue with the auto climate control not changing from vent to vent? Re: Fan Only Blows Defrost, Won’t Change To Floor Or Vent. 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.

What to do when air blows out of defroster vents?

Assuming that your actuator has failed in the most common position, blowing out of the defroster vents only, you should not have to do anything other than installing the actuator motor. No indexing of the door shafts to the cam/cog or recalibration of the actuator motors.

What to do if your GM fan won’t defrost?

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. It’s worth a try.

Why are the vents on top of my car not blowing?

Q: Fan wont blow out top vents for defrost. after pushing defrost , fan vents on top of dash dont blow air My car has 84000 miles. My car has an automatic transmission. Hi there. Check the blend doors to the vents and see if they move when the switch is turned. If they do not move, then check for a vacuum hose to the blend door actuator.

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 are the vents on a car located?

Step 1 – Most air control vents are equipped with a flow control door that is located at the vent outlet. This door is controlled by a thumb wheel that when activated will open and close the vent air flow door. Work the thumb wheel from one side to the other while checking the airflow.

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.

Why is my air conditioning not working on my GMC Sierra?

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.

Why does my GMC Sierra blow hot air?

Our 04 Sierra 2500HD has had on and off problems the last year. Our most recent two was blowing warm air and then stopped altogether. No diagnostic codes. But our sons’ very smart “GMC guru” figured out it was the ignition switch.

Why are the vents on my Chevy Silverado not blowing air?

OK, trying to help my 82 y/o Dad figure out a problem he is having on his 2001 Chevy Silverado. The dashboard vents will not blow any air but the defrost and floor vents work fine. Not a blower motor issue, can be heard running.

Why does my GMC Sierra not blow hot air?

Air won’t blow out of the dash vents but the other modes work fine. Also occasionally blows hot air in A/C mode. Turning off the ignition and restarting corrects the heat issue. Driver’s side heater/a-c works okay… passenger side only blows hot air, regardless of heat setting.

Where does the air come from on a GMC Sierra?

Any suggestions on a good repair manual that will cover the A/C systems and circuitry. Air only comes out dash vents. Changing to floor or defrost switch position does not change air flow. I’ve got a problem I got hot air coming out the vents on the driver side,and cold air on the pass.side that includes when im running the air.

Why is the defrost not working on my GM Truck?

My airflow is stuck in the floor position no matter what setting is switched on the dash vent switch. I can’t get defrost or dash vent air to work. Fan settings do work. Also, there is no light coming on when the AC button and/or the recirculating buttons are pushed.

Why does air come out of the defroster vent only?

At light throttle or when you were on level ground, it was ok. Start up a hill or give it gas to pass someone and the AC would start blowing out of the defroster vents. It still used vacuum. Had to have it fixed one time. One vacuum line from the rear of the intake runs to the control valve under the dash. It must be different from the trucks.

Where is the actuator on the GM P / N?

Here is what the actuator that controls which vent the air blows out of looks like (click for bigger): GM p/n 52473356. I picked up a new one from GM Parts Direct for $53. To answer my own question, this is where the actuator is located on the driver’s side to the right of the steering wheel (click for bigger):

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