To find it:
1. Locate the underhood fuse block: This is usually a rectangular box near the battery, often secured by a cover.
2. Consult your owner's manual: This is the most reliable source. It will have a diagram showing the fuse block layout and identifying the fuse/circuit breaker for the blower motor (often labeled "blower," "HVAC," or similar).
3. Check the fuse block cover: The cover itself usually has a diagram printed on it indicating which fuse controls what.
If you can't find it using the owner's manual or the fuse block diagram, searching online for "2005 Chevy Colorado blower motor fuse location" along with your specific trim level (e.g., "2005 Chevy Colorado LS blower motor fuse location") might yield more precise results.
Important Note: Before working with any electrical components, disconnect the negative terminal of your battery to prevent accidental shorts.