The larger first-generation Driver Information Centers were available from 1989-1993, where in 1994 they upgraded to smaller, one line LCD units. There were two types of DIC's featured in first gen W-body Grand Prix's.
1989-1990 Liquid Crystal Display DIC:
The LCD DIC was introduced in 1989 as an option in the SE and standard equipment on the Turbo models. They were multicolored and displayed information about the car including:
Service Reminders (Change Oil, Rotate Tires, etc.)
Average Fuel Economy
Instant Fuel Economy
1990-1993 Vacuum Florescent Display DIC:
The VFD DIC was introduced in 1990 as standard equipment on the STE Turbo sedans. It later became the standard-fare DIC in 1991. In addition to all the LCD version displayed, the VFD model had a complete light and door monitor. VFD DIC's are backwards compatible and will work in 1989-1990 Grand Prix's, but will not display the extra information as the wiring was not yet put into the cars.