To find the correct fuse and/or relay:
1. Consult your owner's manual: This is the best place to start. It will have a diagram of the underhood fuse box showing the location of the blower motor fuse and relay. The manual will specify the amperage rating for the fuse as well, which is essential if you need to replace it.
2. Check the underhood fuse box: Locate the underhood fuse box (usually near the battery). Look for fuses labelled "blower motor," "HVAC," or something similar. The relay may be identified similarly or may just be a relay of the correct size and appearance (often larger than standard fuses). The diagram in your owner's manual will help you locate it.
3. Check for an inline fuse: While less likely, there might be an inline fuse in the wiring harness leading to the blower motor itself. This is usually a larger fuse than the ones in the fuse box. This would require tracing the wiring.
Important Note: If you're unsure about working with car electrical systems, it's best to take your Tahoe to a qualified mechanic. Incorrectly handling fuses or relays can cause damage to your vehicle's electrical system.
