GMC Savana Dome Light Bulb Size

The GMC Savana dome light bulb size chart specifies 2 bulb sizes: 211-2 and 578 for this vehicle model. The replacement chart covers data spanning from 1996 through 2024 across multiple production years.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2024	211-2
2021-2023	578
1996-2020	211-2

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V, 12W.	578

Other Locations

Additional Notes

The GMC Savana dome light specifications cover model years 1996 through 2024 and reference two bulb sizes: the 211-2 and the 578.
The 211-2 is the dominant bulb across these specifications, appearing in the GMC Savana from 1996 through 2020 and again in 2024.
The 578 bulb is specified for the 2021-2023 model years.
Both the 211-2 and the 578 are ANSI-standard festoon bulbs rated at 12 volts and 12 watts, with a 41mm length.
The primary distinction between the two bulbs is their base type. The 211-2 uses an SV8.5 base, while the 578 uses end-cap contacts.
An SV8.5 base features two metal contacts positioned along the sides of the bulb body, whereas end-cap contacts are metal caps located at each end of the festoon tube.
Despite sharing identical voltage, wattage, and length values, the 211-2 and 578 are not interchangeable due to their differing contact configurations.
Both bulb types fall under the festoon category, a form factor in which the bulb is cylindrical and mounts by pressing between two spring-loaded contacts within the housing.