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In this video, we're going to be replacing the temperature door actuator on this '02 GMC Sierra. This is usually the problem when you turn your temperature control knob, and you don't get any warmer or cold air. You're either just getting warm or just cold or just one temperature. Tools you'll need are a 7mm socket and a 7/32s inch socket with an extension and a ratchet.
On the passenger side, there are four 7mm bolts to remove: one there and one in there. There's one up in that hole right there. I can't really film it. And then over here, closer to the gas pedal there is one right there. Once you remove those bolts, just reach in, kind of pull it down and out of the way.
The actuator is right down here. It's held in with two bolts, they're 7/32s. One of them is right over here. The other one's on the opposite side. It’s a little more difficult to get to. Kind of have to stuff the wrench in there. Kind of starts coming out, and you can disconnect your wrench and just use the socket. Okay.
So the actuator then comes down and out, and there's a little connector right here. Just push and disconnect. Very important when replacing one of these actuators. Make sure that you do not power the actuator up before it's installed.
So make sure your key is off, and you'll see that I actually install it before I plug it in. So install. Push it up and in, and get on the pin in there. I'm starting this bolt over here. Just use my socket. Okay and the final part is to put your cover back in place. You want to push it up in there.
You push it kind of against the firewall first. And I'm sorry about shaking around a little bit here, just trying to film with one hand and push it up in there with the other. Push the front of it up and in first and then make sure you have everything lined up. Okay.
As you could see here, these are the passenger side outlet holes. Make sure those are all lined up and then start your end bolt here, and then I'd recommend starting the ones over near the driver side. Once you have those lined up, then the other two middle ones go in pretty easily.
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