As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLEARED DIRECT TO THE INITIAL APPROACH, SAW THE GPS UNIT DIM THEN GO BLACK. IMMEDIATELY AFTER, SMELLED A BURNING ODOR COMING FROM THE COCKPIT. IMMEDIATELY TURNED OFF THE UNIT AND DECLARED AN EMERGENCY WITH APPROACH CONTROL. ONCE POWER WAS REMOVED FROM THE UNIT, THE ODOR SLOWLY DISSIPATED. MADE A NORMAL LANDING AND TAXIED INTO THE RAMP. NO FIRE OCCURRED AFTER REMOVING POWER FROM THE UNIT.