Garmin GNC 420AW Installation Manual - page 15
400W Series Installation Manual
Page xi
190-00356-02
Rev. G
400W SERIES HARDWARE MOD LEVEL HISTORY
The following table identifies hardware modification (Mod) Levels for the GPS 400W, GNC 420W
and GNS 430W. Mod Levels are listed with the associated service bulletin number, service bulletin
date, and the purpose of the modification. The table is current at the time of publication of this manual
(see date on front cover) and is subject to change without notice. Authorized Garmin Sales and Service
Centers are encouraged to access the most up-to-date bulletin and advisory information on the Garmin
Dealer Resource web site at www.garmin.com using their Garmin -provided user name and password.
MOD LEVEL
SERVICE
BULLETIN
NUMBER
SERVICE BULLETIN
DATE
PURPOSE OF MODIFICATION