4-1190-01182-01 Rev. A Garmin GNC 255A/255B Pilot’s Guide4 APPENDIX4.1 TroubleshootingIf efforts to resolve the problem fail, contact your dealer or the factory fortechnical assistance. The Garmin customer service staff will gladly assist you.Please have the following information ready:• System configuration (products, antennas, mounting locations, etc.)• Model No., part number, and serial number• Software versions• Description of the problem• Efforts made to isolate/solve the problemGarmin International, Inc.Aviation Products Customer Service Department1200 East 151st StreetOlathe, KS 66062-3426 USAIf you have any questions, the Garmin AT Product Support department maybe reached Monday through Friday, 7:00 AM to 7:00 PM Central Time.US: 913-397-8200US Toll Free: 1-866-739-5687Canada Toll Free: 1-866-429-9296e-mail: support.gat@garmin.com.http://www.garmin.comhttps://fly.garmin.com/fly-garmin