HomeAll RepliesRe: 2015 Impala SS/Hybrid? Re: 2015 Impala SS/Hybrid? Sponsored April 24, 2012 at 2:50 pm #39666 Alex LuftKeymaster That would work, too. Unfortunately, I know too many smarta$$es who will about the reason it’s named “Z” and whether it’s due to the car being slow and always coming in last (like the last letter of the alphabet). Sponsored Subscribe to GM Authority For around-the-clock GM news coverage We'll send you one email per day with the latest GM news. It's totally free. First Name Last Name Email Address Subscribe via Email Leave this field empty if you're human: Sponsored