2003 Chevy Suburban Blower only works on high.

2003 CHEVROLET SUBURBAN
80,000 MILES • V8 • 2WD • AUTOMATIC
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OAKY
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The blower for the heat/ ac did only work on level 3 but just recently I have to put it all the way to 5 (the highest) for it to work. It moves a lot of air just like it should on level 5. If I have it on 4 and am driving at a decent speed (40 mph or more) it will blow at a low level. Since I've had the truck it never really moved any air at level 1 but it has now gotten much worse.
Sep 17, 2008 at 1:36 PM
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2CARPRO JACK
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If the fan is working but not much air is moving,you may have a pluigged cabin filter. Remove the plastic shield under dash passenger side. There is a screw to remove the cover for the cabin filter, pull it out an dsee ifit is full of debris. I have seen them so plugged hardly any air could get through
Sep 17, 2008 at 1:46 PM