This article applies to the Chevrolet Silverado 1500 1996-2006. Click here to learn how to replace it. Unfortunately, the blend doors on the Chevy Silverados contain plastic gears that tend to strip easily. I took a voltmeter to the wiring harness itself and do get voltage. I connected it directly to a 12V power source and it will turn. This 2004 Chevrolet Silverado came in with a faulty passenger side blend door actuator.
Gently Lift the upper dash cover up, but do not remove it. This is a shade tree mechanic fix, it worked for me. You can also disconnect the battery. The outer edge of the arm has 2 slots: The outer slot connect to a white geared arm that controls a flapper, while the inner slot connects over a black bump which is essentially a cam that controls another flapper. I did this with 2pieces of wood and a small c clamp. Thats is how i fixed mine anyway.
It was off one tooth so that the servo would continue to try and drive the output gear past the stop on the case, causing the gear train to bind up. When you change this item make sure you adjust your temp knobs to the middle exactly or you will break the new actuator. Twist the ambient light bulb off. To see which blend door is temperature, left, right or recirculate please visit this page The actuator that controls the feet, face and defrost is near the gas pedal. Given this part fails regularly, they had them in stock.
I will try those reset steps tomorrow when there is daylight. Now that the dash cover is off and you can see the actuator, but you still cannot get to it. In the last post I got you to this point. Kind of at my wits end, on this one. I never worried about fixing it because I could restart the truck and it would work normally again.
Take note of how the gears of the actuator arm line up with the white arm. When I reverse polarity here, it will not turn back. Often you can hear air escaping behind the dashboard or feel the air exiting the wrong locations. In this video we show how to replace the blend door actuator that controls the heat and cold in a 1999-2007 Chevrolet Silverado. As with the blend door motor you'll hear a click or grinding sound as the gears strip trying to make the adjustments.
Replacing this part would have been much more challenging without all the posts. Turns out that the 'difficult to access' actuator motor under the dash near the top was broken. This was the source of the clicking noise. I have searched and can't find anything on a nnbs only older stuff. In the early days we had reliable cables that manually operated the doors putting us in control.
Use this guide if you can't control the temperature in your vehicle. Any advice, would be appreciated. That is a whole other post though. Mine was a bit stuck and took a fair amount of encouragement. Any help would be greatly appreciated. This actuator assembly might fit a few other models, but double-check the part numbers for your car. Remove the 7 mm headed screws from the brackets on the passenger side.
I've taken this a step further and reduced the length of the Torx bit before I put it in my mini ratchet. On my Tahoe the driver side won't blow cold air. My driver side air vents are only blowing hot air. After installing a temperature control or blend door actuator I move the dial all the way to one direction before I turn on the key for the first time. I just wanted to see if any of you have tried this and what has to be removed. The bottom screw was easy to remove but the top was a bear due to obstructions.