But the GCC did much more than just let a driver adjust the radio's volume and the A/C. You could run a vehicle diagnostic and get information on the brakes, powertrain and electrical system. Hell, it would even tell you how much gas was left in the car. You could also use it to track your trip. All of those features may sound pedestrian but remember that this is the 1980s we're talking about and this is an American production car, not some Italian supercar. At 3x4 inches, the screen itself wasn't very large, but the unit was. It was a cathode-ray tube design, basically a miniature TV shoved into the dash. Reaction to the touchscreen was about the same across the board. Outlets like Popular Mechanics praised the tech and bashed the ergonomics.