"Talk to Claptrap" is an objective in the story mission The Talon of God in Borderlands 2
Walkthrough
Go over to where Claptrap hangs out by his stash. Talk with him and he will roll on out to the Eridium Blight.
Dialogue
Claptrap: It's time to end this! I'll meet you out in the Eridium Blight.
