2010 GMC Sierra starter sticking on

5.3L v8
Occasionally when starting the truck with either the remote start or with the key, the starter sticks on and keeps trying to start until I roll the key back and shut off the truck. It is random and only happened 3 times in past 6 months. Any thoughts on what it would be?

Sounds like either the ign switch or starter relay, not the key cylinder but the ign. switch.