Question about Chevrolet Silverado 2500HD

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So I am having a problem with my A/C that everyone says is my cabin air filter. When I am parked, the A/C hardly blows at all, but when you speed up it starts going. By the time you hit 70 mph there's a pretty good breeze going, but when you slow down it stops blowing as much. Like I said, everyone straight up says cabin air filter, easy solution. Well, I drive a 2004 Chevrolet 2500HD and as I've looked all over the internet everyone says my truck doesn't have a cabin air fitler. So how do I fix the problem if my truck doesn't have that part?

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I would put some thought into replacing the fan or the fan switch first. If the fan works OK when in heat mode, then i would suspect the A/C controls as what you say tells me the fan is not working. Only forward motion of the car causes air to pass through. Your vehicle has a cabin filter, NAPA part #
4814 but it would surprise me that its being blocked could cause the problem you described. In fact I do not think any cabin filter could be blocked to that extent.

Posted on May 17, 2011


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