For 1990-2009 cars

#### GM SPO Group Numbers

Application | GM SPO Group Number
--- | ---
Backup Lamp Bulb | 8.991
Cargo Lamp | 9.988
Daytime Running Lamp Control Module | 2.485
Dome Lamp | 11.927
Dome Lamp Bulb | 8.991
Door Jamb Switch | 11.950
Front Turn Signal Lamp | 2.585
Front Turn Signal Lamp Bulb | 8.991
Headlamp | 2.725
Headlamp Bulb | 2.727
High Mounted Stop Lamp | 2.679
Parking Lamp Bulb | 8.991
Rear License Plate Lamp | 2.700
Rear License Plate Lamp Bulb | 8.991
Rear Side Marker Lamp Bulb | 8.991
Tail Lamp | 2.679
Tail Lamp Bulb | 8.991
Turn Signal Lamp Bulb | 8.991
Turn Signal Lamp Flasher | 2.892