Https://www.autogenius.info/chevrolet-traverse-2010-fuse-box-diagram/
Did you also check the LB headlight relay. If LB and HB relays are the same you might want to switch them to see if Low Beam will start working.
fuse box diagram in link above.
SOURCE: 2004 chevy trailblazer low beams not working fuses good bulbs new
Check the relay or your head light switch has gone bad.
SOURCE: Both headlights went out on 98 Chevy S10. Fuses
Could be the headlights themselves. test them using a power source
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