In the fiftieth year of the reign of King Uzziah of Judah, Pekahiah son of Menahem became king of Israel, and he ruled in Samaria for two years.
He sinned against the Lord, following the wicked example of King Jeroboam son of Nebat, who led Israel into sin.
An officer of Pekahiah's forces, Pekah son of Remaliah, plotted with fifty men from Gilead, assassinated Pekahiah in the palace's inner fortress in Samaria, and succeeded him as king.
References for 2 Kings 15:25
Everything else that Pekahiah did is recorded in [The History of the Kings of Israel.]