The stair car was one of the few remaining modes of transport available to the Bluth family, and was frequently driven by Michael Bluth. It was originally paired with the company jet, which was sold off to help deal with the company's financial woes. It had a large Bluth Company logo on the side.

It has led a notorious existence, knocking down banners, ("Queen for a Day") helping inmates attempt to escape prison, ("Visiting Ours") ("Prison Break-In") and letting people sneak to upstairs windows. ("Shock and Aww") A constant problem while driving it is avoiding hop-ons. ("Sword of Destiny")

Michael gave the stair car to George Michael when he debarked for college. ("Flight of the Phoenix") Maeby then traded it for Lucille Austero's yellow 1987 Cadillac Coupe DeVille. ("Señoritis") Lucille Austero then had the Austero Bluth Company logo painted on the side and used it in her Congressional campaign. ("Flight of the Phoenix") At Cinco de Cuatro Lucille 2 was potentially murdered on the stair car. ("Off the Hook") When Lucille Austero vanished, Sally Sitwell had "Vote for Sitwell" painted on the side of the stair car. ("Señoritis")

Michael: Stair car basics: In order to get this thing up to a minimum speed, you’ve got to jam on the gas pedal for about a minute, okay? But in order to slow this thing down, you’ve got to get almost immediately back on the brake pedal, ’cause you’ve got about two tons of stairs behind you.

George Michael: Okay.

Michael: We’re gonna cover the hydraulic flaps and the riser system after I tell you the basics about how to avoid a hop-on. But the first thing we’re going to go over... Ow...