Where is the blower motor relay located for a 1991 GMC Sonoma?

The blower motor relay for a 1991 GMC Sonoma is typically located in the under-hood fuse box. It may also be found near the firewall on the passenger side of the engine compartment. To access it, you may need to remove the cover of the fuse box and refer to the diagram on the cover or in the owner's manual for the specific relay location.