PC-12
Flight Crew Instrument; Flight Crew Commercial
Troubleshooting
Aircraft Equipment Problem Critical; Ground Event / Encounter Fuel Issue
Flight Crew Diverted; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
While conducting a FAR 91 reposition flight from ZZZZ to ZZZ; we were cleared to maintain a cruising altitude of Flight Level 260. Approximately three hours into our cruise; the Central Advisory and Warning System (CAWS) triggered a master caution and the LH FUEL PUMP and RH FUEL PUMP green indicator lights illuminated. About 10 seconds later they extinguished; only for another master caution to sound and the same lights to return; indicating a low fuel pressure situation. We ran the emergency procedure checklist for low fuel pressure. After completing the low fuel pressure checklist; we were unable to rectify the low fuel pressure condition and [advised] ZZZ Center. Per the low fuel pressure checklist; we diverted to the nearest suitable airfield. ZZZZ1 was the nearest suitable airfield. Center informed us that all nearby airports; including ZZZZ1; were closed at sunset and personnel were being contacted by ZZZZ Approach to turn the lights on at ZZZZ1. We conducted the RNAV RWY XX Approach to a visual landing at ZZZZ1 and parked the aircraft without further incident. The aircraft was then grounded. Lack of guidance in emergency checklist on time frame for both rate of descent to warmer air; as well as restoring boost pump switches to AUTO after descent to warmer air.
[Report narrative contained no additional information.]
Air taxi flight crew reported that they got a fuel pump warning followed by a low fuel pressure warning and were able to divert without further incident.