C-402 pilot reported intermittent GPS malfunction while in flight.

Attributes
ACN	1667360
Time
Date	201907
Local Time Of Day	1201-1800
Place
Locale Reference	ZLC.ARTCC
State Reference	UT
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Cessna 402/402C/B379 Businessliner/Utiliner
Operating Under FAR Part	Part 135
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	GPS & Other Satellite Navigation
Person 1
Function	Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

On flight to ZZZ had terrain warning when there was no terrain anywhere close to me at 9000 feet; which was followed by loss of GPS and eventually the autopilot as well. Started working fine after 2 minutes.

Original NASA ASRS Text

Title: C-402 pilot reported intermittent GPS malfunction while in flight.

Narrative: On flight to ZZZ had terrain warning when there was no terrain anywhere close to me at 9000 feet; which was followed by loss of GPS and eventually the autopilot as well. Started working fine after 2 minutes.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.