2004 Trailerblazer fan speed


Old 02-05-10, 12:30 PM
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2004 Trailerblazer fan speed

My truck blower motor only works on speed 3 -5 the 1-2 doesnt work not really sure where to start? When i first got truck used it seemed like the #1 postion didnt work an now the #2 doesnt work.
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Old 02-05-10, 12:42 PM
Join Date: Mar 2009
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A very common part that often causes this situation is a failing blower motor resistor. Sometimes as they start to fail they drop the low speeds one at a time and eventually leave only the high speed. Other times they drop all lower speeds at once. It's one place I would start with. Maybe less than $30 to buy, but may not always be easy to get at in some GM products. Not sure about your truck but I think that some of their cars have them buried behind the glove box.

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