White/GMC WXR Headlight Bulb Size

The White/GMC WXR high beam and low beam headlight bulb size specifications include 9004 and H6024 options. The replacement chart covers 1993 to 1995 production years with corresponding bulb size data.

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

High Beam Headlight

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1993-1995	9004 (With Composite Headlamps)	HB1	Check Price
1993-1995	H6024 (With Sealed Beam Headlamps)	H6024	Check Price

Low Beam Headlight

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1993-1995	9004 (With Composite Headlamps)	HB1	Check Price
1993-1995	H6024 (With Sealed Beam Headlamps)	H6024	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament halogen bulb with P29t base. 12V, 65W/45W.	9004	Check Price
ANSI standard (US & Canada). 7-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6024	Check Price

Other Locations

Additional Notes

The White/GMC WXR used two distinct headlamp system types across the 1993-1995 model years, with bulb selection determined entirely by which system was installed on the vehicle.
The 9004 is a dual-filament halogen bulb operating at 12V with a P29t base, rated at 65W on the high beam filament and 45W on the low beam filament, and it meets ANSI standards for use in the United States and Canada.
Because the 9004 contains both high and low beam filaments within a single housing, it serves both the high beam and low beam functions in composite headlamp-equipped WXR vehicles.
The H6024 is a 7-inch round sealed beam unit rated at 12V and conforming to ANSI standards for the United States and Canada. The entire unit constitutes the light source, meaning no separate replaceable bulb exists within it.
Vehicles fitted with sealed beam headlamps require full unit replacement rather than bulb replacement, which distinguishes them from composite headlamp vehicles where only the 9004 bulb is exchanged.
The two headlamp systems are not interchangeable at the bulb level. A vehicle with composite headlamps takes a 9004 bulb, while a vehicle with sealed beam headlamps requires an H6024 unit, and the two types are incompatible with each other's housings.