Does sylvia die on the Little House Prairie episode?

You're likely thinking of the Little House on the Prairie episode "The Little House". While there's no death in that episode, there is a major event that might lead to your confusion:

* The death of a character named "The Little House". This is a bit of a twist, as the episode focuses on the Ingalls family selling their original little house in Kansas. The house itself is sold and essentially "dies" by leaving the Ingalls family.

Sylvia is a character in the Little House on the Prairie series, but she is not a central figure and doesn't appear in the episode "The Little House".

Hopefully, this clarifies your question!