Question about 2005 GMC Sierra
Yes, you are correct, there is a separate fuse in your Sierra.
It is in the underhood fuse panel marked "BLWR/ECAS" and is rated at 40 AMPS.
All your other speeds go through the resistor. The high speed is energized on a separate circuit through a relay that is part of the resistor you replaced.
It is possible that when the resistor went bad it shorted out that fuse.
There you are, glad to be able to assist you today.
Thank you for using FixYa.
Posted on Dec 31, 2010
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Posted on Jan 02, 2017
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