Chevrolet LUV Dome Light Bulb Size

The Chevrolet LUV dome light utilizes unique bulb sizes 6428, 13050, and DE3021 across various production versions. Available data for the specified lighting components covers the range from 1975 through 1982.

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
1982	6428
1980-1981	13050
1978-1979	6428
1977	DE3021
1976	13050
1975	DE3021

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 36mm length, SV8.5 base. 12V, 5W.	6428
OEM/Wagner part number. Halogen bulb, specialty application. 12V.	13050
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3021

Other Locations

Additional Notes

The Chevrolet LUV dome light specifications span model years 1975 through 1982, covering three distinct bulb types across that range.
The 6428 is an ANSI-standardized festoon bulb rated at 12V and 5W, with an SV8.5 base and a 36mm length. It appears in the Chevrolet LUV for model years 1978, 1979, and 1982.
The DE3021 is also an ANSI-standardized festoon bulb rated at 12V, with a 31mm length and end-cap contacts rather than a bayonet or screw base. It is specified for the 1975 and 1977 model years.
Festoon bulbs, such as the 6428 and DE3021, are cylindrical lamps that make electrical contact at both ends of the housing rather than through a side-pin or screw base.
The 6428 and DE3021 are both festoon-type bulbs but are not interchangeable, as the 6428 is 36mm in length while the DE3021 is 31mm. Installing the wrong length can result in poor contact or fitment failure.
The 13050 carries an OEM/Wagner part number designation rather than an ANSI standard number, indicating it is identified through a manufacturer-specific catalog system. It is rated at 12V and is classified as a halogen bulb for a specialty application.
The 13050 is specified for the Chevrolet LUV in model years 1976, 1980, and 1981. Its halogen classification distinguishes it technically from the non-halogen festoon types used in other years.
Because the LUV uses three different bulb types across its model year range, year-specific verification is necessary before substitution, as no single bulb type covers the full 1975-1982 span.