The blower motor fuse on a 2005 Chevy Silverado is typically located in the engine compartment’s power distribution center (the under-hood fuse/relay block). If you don’t find it there, there’s often a secondary fuse in the interior fuse block behind the glove box. Here’s how to locate and verify the fuse.
Locating the fuse in the engine compartment
Start with the vehicle’s primary fuse box under the hood. The cover often contains a diagram that identifies each fuse by name and rating. Look for a fuse labeled BLOWER, FAN, or HVAC to identify the blower motor circuit.
Before you begin, ensure the ignition is off and the battery ground is disconnected if you’re planning to remove fuses for inspection. Use the diagram on the PDC cover to confirm the exact position.
- Open the hood and locate the Power Distribution Center (a large black plastic box near the driver’s side fender or firewall).
- Remove the cover and read the fuse diagram. Find the fuse labeled BLOWER or HVAC and note its amperage rating.
- Inspect the fuse: a blown fuse will have a broken metal strip or a darkened appearance. Replace only with a fuse of the same amperage rating.
- Re-connect power and test the blower at multiple speeds to confirm operation.
If the blower still doesn’t work after replacing the fuse, the issue may lie with the blower motor itself, the blower resistor, a faulty relay, or wiring problems. A persistent issue warrants a deeper diagnosis.
Checking the interior fuse block as a secondary location
Some Silverado configurations also route the blower circuit through an interior fuse block, usually located behind the glove box or under the driver's side dash. If the under-hood fuse checks out but the blower still won’t operate, inspect this secondary block.
- Find the interior fuse panel (often behind the glove box or on the left side of the dash).
- Look for a fuse labeled BLOWER, HVAC, or similar, and confirm its rating from the cover diagram.
- Remove and inspect the fuse; replace with the same amperage if blown.
Concluding here, if both fuses are intact but the blower still fails, the fault is likely in the blower motor, the blower resistor pack, the relay, or the wiring harness, rather than a blown fuse alone.
What to do next if the fuse is fine
Diagnostics and next steps
With fuse tests out of the way, proceed to diagnose the blower system components. Check the blower motor for continuity, test the blower resistor for proper resistance, verify that the blower relay clicks when requested by the climate control, and inspect the wiring for corrosion or loose connections. If you’re not comfortable with electrical diagnostics, consider consulting a professional technician or using the vehicle’s wiring diagram from the service manual.
Summary: For a 2005 Silverado, the blower motor fuse is usually in the engine compartment’s Power Distribution Center, with a possible secondary fuse in the interior fuse block behind the glove box. Use the labels on the fuse blocks to identify the correct fuse, replace with the proper amperage, and investigate the blower motor, resistor, and related wiring if problems persist.