Pamela Anderson was replaced by Debbie Dunning
Pamela Anderson was replaced by Debbie Dunning as Tool Time Girl and her name was Heidi Keppert. She became the assistant for Tim and Al for 6 seasons and she also introduced the show. The first episode where Dunning appeared was “Maybe Baby” (3rd Season) and the audience fell in love with her immediately.
Her role was actually minor in the beginning. By the final seasons she was pretty much considered main cast though.