Detailed Instructions: Generate a correct and concise answer for the question based on the words in the context.
Q: Context : Pontiac was a brand of automobiles manufactured and sold by General Motors (GM); though production ended in 2009, Pontiac remains a registered and active trademark of GM. The Pontiac automobile brand was established in 1926 as a companion make for GM's more expensive line of Oakland automobiles.
Question : What company is Pontiac part of?
A:
General Motors