Whats the name of this movie?

Whats the name of this movie, it was a long long time ago it was on
SyFy i believe. The little girl and her beautiful older sister were
driving somewhere and they crash into a rock that was randomly in the
middle of the rode. And the little girl gets out of the car (the car
was in flames) and she sees her sister still in the car, she couldn't
get out of the car because her seat belt was stuck, and she was
burning alive, she was also crying for the little sister to help her
and the little girl doesnt help her. And the older sister burnt to
death. And then she comes back to haunt people and shes all burnt and
her skin is all melted and stuff. And she tries killing the little
sister, by drowning her i think, and the little sister shows her the
necklace she gaved her. And the older sister stops, but then tricks
the little sister and tries killing her again, but the little sister
escapes.
Do you know the name of the movie?