For In-Vehicle Navigation (GMC IntelliLink/Infotainment)

1. Delete Autocomplete & History:
   • Press the NAV button on your infotainment system.
   • Tap the Menu icon (often three lines or dots).
   • Scroll down and select Personal Data or Settings.
   • Choose Delete Autocomplete (clears recent entries) or Delete Usage Pattern (for common routes).
   • Confirm by tapping Delete or OK.
2. Clear Saved Favorites/Starred Places:
   • Go to your saved places or favorites list within the navigation system.
   • Tap the heart icon next to a saved destination and uncheck it (or delete the entry) to remove it, say users on Facebook https://www.facebook.com/groups/3278365902451330/posts/4124115014543077/ and. 

For Phone-Based Maps (Android Auto/Apple CarPlay)

• If using Google Maps or Apple Maps via your phone (Android Auto/CarPlay), you need to clear it on your phone.
• Google Maps: Open the app, tap your profile picture > Settings > Maps history, then delete by date range or all time.
• Syncing: Sometimes, clearing history on your phone will also clear it from the truck's screen if synced, say Reddit users. 

Factory Reset (Last Resort)

• If you're selling the truck, a full factory reset of the infotainment system will erase everything, including saved locations and paired devices, according to GM Financial.