OEM GM Guide T-3 High-Beam Headlight Bulb #4001 Date Code 12 8 20
USD 55.00 USD
Specifications
| Manufacturer Part Number | 4001 |
| Vintage Part | Yes |
| Suitable For | Headlight |
| Placement On Vehicle | Front |
| Type | Light Bulb |
| Voltage | 12 V |
| Features | Direct Replacement |
| Lighting Technology | Incandescent |
The date code is 12 8 20. I have found at least three different dates given for that code. What makes the most sense is the first digit of the first number is supposed to refer to the month (1-January).
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