Arrival time on GMC Sierra EV HUD shows wrong time zone

With a route entered on my GMC Sierra EV Infotainment system in ABRP the map on the main screen shows the arrival time correctly (4:34 PM) for the Central Time Zone (US). Trip is totally in the CDT time zone. On the Heads up display the arrival time is shown as 2:34 PDT (Pacific Time Zone). I did try changing the time zone function in the vehicle from automatic to manual with no change in behaviour. Google maps is showing the correct arrival time for a route.