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Use this Chevrolet Cobalt bulb size guide to find replacement bulb sizes for 2005–2010 Chevrolet Cobalt applications. The supplied chart covers combined high/low beam headlights, front fog lights, reverse lights, brake lights, center high-mount stop lights, courtesy lights, dome lights, license plate lights, map lights, parking lights, side markers, tail lights, trunk lights, turn signals, and transmission/turn-signal indicator bulbs.
The supplied source covers one 2005–2010 model-year range, so all fitment data is kept in one complete chart. Use the exact light position below before ordering, and verify the original bulb when trim or factory lighting equipment may differ.
Choose the complete interior LED light kit that matches the 2005–2010 Chevrolet Cobalt.
Only bulb families with a confirmed matching SAWE page are linked below. Other bulb sizes remain fully listed in the fitment chart as plain text.
Headlight: the supplied chart lists 9007/HB5 for the combined high-beam and low-beam headlight position.
Front fog light: H11/H8/H9 is listed for the front fog-light position.
Reverse / high-mounted brake: T15/912/921 is listed for both the reverse light and center high-mount stop light.
Brake / parking / tail / turn signals: 3157/3156 is listed for the brake, parking, tail, front turn-signal, and rear turn-signal positions.
Interior and marker lighting: T10/194/168 is listed for license plate, map, front/rear side-marker, and trunk positions, while 578/211-2/41MM is listed for courtesy and dome lights.
Indicator bulbs: T5 is listed for the automatic-transmission indicator and turn-signal indicator positions.
| Light Type | Bulb Size |
|---|---|
| Headlights (High Beam and Low Beam) | 9007 (HB5) |
| Front Fog lights | H11 (H8 H9) |
| Automatic Transmission Indicator | T5 |
| Reverse Light (Back-Up Light) | 912 921 T15 |
| Brake Light | 3157 (3156) |
| Center High Mount Stop Light | 912 921 T15 |
| Courtesy Light | 578 211-2 41MM |
| Dome Light | 578 211-2 41MM |
| License Plate Light | 194 168 T10 |
| Map Light | 194 168 T10 |
| Parking Light | 3157 (3156) |
| Side Marker Light (Front) | 194 168 T10 |
| Side Marker Light (Rear) | 194 168 T10 |
| Tail Light | 3157 (3156) |
| Trunk Light | 194 168 T10 |
| Turn Signal Light (Front) | 3157 (3156) |
| Turn Signal Light (Rear) | 3157 (3156) |
| Turn Signal Indicator Light | T5 |
There is no single bulb size for every Cobalt light position. The supplied chart includes 9007/HB5, H11/H8/H9, T5, T15/912/921, 3157/3156, 578/211-2/41MM, and T10/194/168 depending on the light being replaced.
The supplied 2005–2010 chart lists 9007/HB5 for the combined high-beam and low-beam headlight position.
H11/H8/H9 is listed for the front fog-light position in the supplied chart.
T15/912/921 is listed for the reverse / back-up light position in the supplied chart.
3157/3156 is listed for the brake light, front turn signal, rear turn signal, parking light, and tail-light positions.
The supplied chart lists 578/211-2/41MM for the dome light and T10/194/168 for the map light.
Important: Bulb-size information is provided as a fitment reference and may vary by exact model year, trim, factory lighting equipment, or regional specification. Confirm the original bulb before purchase.
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