GE never made a color called "Sunny Yellow" - that was Frigidaire. GE's pastel yellow is "Canary Yellow". It was offered from the '55 model year until at least early '67, when it was discontinued for the introduction of Harvest. It was around approx. one year longer than Turquoise. I have a catalog somewhere that is dated 1967, and it shows GE appliances in White, Coppertone, Avocado and Canary Yellow.