I just looked up a year by year changelog, looks like '91 was the final and best year
First Generation/Origins (1988–1991)
- 1988
- All new model.
- Mid-year running change from leather and suede seating to all-leather due to durability concerns.
- Mid-year running change from silver/black 'R' logo horn button to color "sunburst" 'R' logo.
- Mid-year, sunroof option becomes available.
- 1989
- Larger 'R' "sunburst" hood ornament.
- Remote controlled glove box door replaced with a conventional locking door.
- Remote trunk and gas door release buttons relocated to glovebox from center console.
- Keyless entry added as standard.
- Revised, hydraulic engine mounts.
- 1990
- Interior revised. Touchscreen eliminated and replace with a more conventional digital dash with GM standard-issue stereo radio-cassette player and HVAC controls housed within a new rounded dash enclosure.
- Power window controls relocated from center console to door-mounted armrests.
- Rear quarters' component speakers replaced with conventional 4X6 units.
- Illuminated door lock keyways eliminated.
- Steering wheel airbag added as standard.
- Optional CD player offered as an add-on to the standard stereo radio with cassette player.
- Convertible model debuts.
- 1991
- 3800 Series I engine as standard, with increased horsepower and torque coupled to a new electronically-controlled 4T60-E 4-speed automatic transmission with revised gear ratios.
- Teves anti-lock braking system replaced with a new vacuum-driven system.
- Twilight Sentinel automatic headlights added as standard.
- 16" aluminum alloy wheels replaced previous years' 15" rims.
- Cupholder added to center console armrest.
Electronic controlled 4T60E, the better Series I 3800, keyless entry, airbag, twilight sentinel
A
cupholder
What a car, I respectfully demand more pictures when they become available