- The fuse for the heater fan in a 2003 Chevrolet Impala is located in the fuse block located in the trunk.
- Open the trunk and locate the fuse block on the left side of the trunk,
- Remove the cover, and you will find the fuse labeled "Heater Fan".
- If this fuse is blown, replace it with a new 20-amp fuse.
- This should restore power to the heater fan and allow it to function properly.