Bulb size & fitment reference

GMC Sierra 2500
Bulb Size Guide

Get the bulb-size answer first, then check factory-system differences and position-specific notes before buying.

Select Your Vehicle

Quick Answer for 2004 GMC Sierra 2500

Start with the positions you’re most likely to replace. Full fitment details are below.

Headlight High Beam

Headlight Low Beam

Reverse Light

Brake Light

Full Bulb Fitment by Lighting Position

Find the bulb size for each lighting position and check any fitment notes before ordering.

GMC Sierra 2500 (2004) Bulb Size Chart

Lighting PositionBulb SizeNoteNext Step
Headlight High Beam9005 / HB3Shop position →
Headlight Low Beam9006 / HB4Shop position →
Fog Light9145 / H10Shop position →
Daytime Running Light3157 / 3156Shop position →
Front Turn Signal3157 / 3156Shop position →
Parking Light3157 / 3156Shop position →
Rear Turn Signal3157 / 3156Shop position →
Brake Light3157 / 3156Shop position →
Center High Mount Stop Light912 / 921 / T15Shop position →
Tail Light3157 / 3156Shop position →
Reverse Light3157 / 3156Shop position →
License Plate LightT10 / 194 / 168Shop position →
Front Side Marker LightT10 / 194 / 168Shop position →
Rear Side Marker LightT10 / 194 / 168Shop position →
Side Marker LightT10 / 194 / 168Shop position →
Dome Light211-2 / 578 / 41MMShop position →
Map Light211-2 / 578 / 41MMShop position →
Courtesy LightT10 / 194 / 168Shop position →
Glove Box LightT10 / 194 / 168Shop position →
Stepwell LightT10 / 194 / 168Shop position →
Luggage Compartment Light912 / 921 / T15Shop position →
View Fitment Options →

GMC Sierra 2500 (2003) Bulb Size Chart

Lighting PositionBulb SizeNoteNext Step
Headlight High Beam9005 / HB3Shop position →
Headlight Low Beam9006 / HB4Shop position →
Fog Light9145 / H10Shop position →
Daytime Running Light3157 / 3156Shop position →
Front Turn Signal3157 / 3156Shop position →
Parking Light3157 / 3156Shop position →
Rear Turn Signal3157 / 3156Shop position →
Brake Light3157 / 3156Shop position →
Center High Mount Stop Light912 / 921 / T15Shop position →
Tail Light3157 / 3156Shop position →
Reverse Light3157 / 3156Shop position →
License Plate LightT10 / 194 / 168Shop position →
Front Side Marker LightT10 / 194 / 168Shop position →
Rear Side Marker LightT10 / 194 / 168Shop position →
Side Marker LightT10 / 194 / 168Shop position →
Dome Light211-2 / 578 / 41MMShop position →
Courtesy LightT10 / 194 / 168Shop position →
Glove Box LightT10 / 194 / 168Shop position →
Ash Tray LightT10 / 194 / 168Shop position →
Stepwell LightT10 / 194 / 168Shop position →
Luggage Compartment Light912 / 921 / T15Shop position →
Engine Compartment Light1156 / BA15SShop position →
View Fitment Options →

GMC Sierra 2500 (2000–2002) Bulb Size Chart

Lighting PositionBulb SizeNoteNext Step
Headlight High Beam9005 / HB3Shop position →
Headlight Low Beam9006 / HB4Shop position →
Fog Light880Shop position →
Daytime Running Light3157 / 3156Shop position →
Front Turn Signal3157 / 3156Shop position →
Parking Light3157 / 3156Shop position →
Rear Turn Signal3157 / 3156Shop position →
Brake Light3157 / 3156Shop position →
Center High Mount Stop Light912 / 921 / T15Shop position →
Tail Light3157 / 3156Shop position →
Reverse Light3157 / 3156Shop position →
License Plate LightT10 / 194 / 168Shop position →
Front Side Marker LightT10 / 194 / 168Shop position →
Rear Side Marker LightT10 / 194 / 168Shop position →
Side Marker LightT10 / 194 / 168Shop position →
Dome Light211-2 / 578 / 41MMShop position →
Courtesy LightT10 / 194 / 168Shop position →
Glove Box LightT10 / 194 / 168Shop position →
Ash Tray LightT10 / 194 / 168Shop position →
Stepwell LightT10 / 194 / 168Shop position →
Luggage Compartment Light912 / 921 / T15Shop position →
Engine Compartment Light1156 / BA15SShop position →
View Fitment Options →

GMC Sierra 2500 (1999) Bulb Size Chart

Lighting PositionBulb SizeNoteNext Step
Headlight High Beam9005 / HB3Halogen CapsuleShop position →
Headlight Low Beam9006 / HB4Halogen CapsuleShop position →
Daytime Running Light3157 / 3156Halogen CapsuleShop position →
Front Turn Signal1157Shop position →
Parking Light1157Shop position →
Rear Turn Signal3157 / 3156Shop position →
Brake Light3157 / 3156Shop position →
Center High Mount Stop Light912 / 921 / T15Shop position →
Tail Light3157 / 3156Shop position →
Reverse Light3157 / 3156Shop position →
License Plate LightT10 / 194 / 168Shop position →
Front Side Marker LightT10 / 194 / 168Shop position →
Rear Side Marker LightT10 / 194 / 168Shop position →
Side Marker LightT10 / 194 / 168Shop position →
Dome Light211-2 / 578 / 41MMShop position →
Glove Box LightT10 / 194 / 168Shop position →
Ash Tray LightT10 / 194 / 168Shop position →
Stepwell LightT10 / 194 / 168Shop position →
Luggage Compartment Light912 / 921 / T15Shop position →
Engine Compartment Light1156 / BA15SShop position →
View Fitment Options →
Fitment Reminder
Bulb size can vary by factory setup. If you're unsure which option applies to your vehicle, confirm your current bulb or select your configuration on the product page.