1 Years Available
Geo Spectrum Light Bulb Sizes
Complete bulb size reference for the Geo Spectrum from 1989 to 1989. Find headlight, fog light, turn signal, and brake light bulb sizes for every model year.
Every Geo spectrum from 1989 to 1989 uses the same 9004 low beam bulb — once you confirm your year is within this range, you only need one part number.
Year Range
1989 – 1989
1 model yearsBulb Sizes Across Years
| Position | Bulb Type(s) | Years | Status |
|---|---|---|---|
| Low Beam | 9004(1989–1989) | 1 years | Consistent |
| Side Marker | 194(1989–1989) | 1 years | Consistent |
| Turn Signal Front | 1157(1989–1989) | 1 years | Consistent |
| Parking Light | 1157(1989–1989) | 1 years | Consistent |
| Tail Light | 1157(1989–1989) | 1 years | Consistent |
| Brake Light | 1156(1989–1989) | 1 years | Consistent |
| License Plate | 168(1989–1989) | 1 years | Consistent |
| Trunk Light | DE3022(1989–1989) | 1 years | Consistent |
| Dome Light | DE3175(1989–1989) | 1 years | Consistent |
Common Spectrum Replacement Parts
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Frequently Asked Questions
We have bulb size data for the Geo Spectrum from 1989 to 1989, covering 1 model years. Select your year below for a complete position-by-position bulb chart.
No, the Geo Spectrum has used the 9004 low beam bulb consistently. Any year in the 1989–1989 range uses the same bulb.
The Geo Spectrum uses a 9004 bulb for the low beam. Select your year below for the exact fitment chart.
Yes. The Geo Spectrum uses a 9004 low beam, and direct-fit LED conversion kits for that size are widely available. LED upgrades typically produce 2–3× more light output than stock halogen and last 25,000+ hours. Look for a DOT-compliant kit with a proper beam cutoff pattern.
Select your model year from the list below. Each year page shows every bulb position — low beam, high beam, fog light, turn signal, and brake light — with the correct size and a link to buy it on Amazon.