Peterbilt 335 headlight bulbs utilize H6054, 9004, and H4651 sizes for high beam applications and H6054, 9004, and H4652 sizes for low beam applications. The replacement chart covers 2005 through 2009 vehicle production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Peterbilt 335 (2005-2009) uses three distinct headlight configurations: a 2-rectangular-headlamp setup, a 4-rectangular-headlamp setup, and a halogen capsule headlamp setup. Each configuration requires a different bulb type, and the correct fitment depends entirely on which headlamp arrangement is present on the vehicle.
The H6054 is a 5x7-inch rectangular sealed beam unit operating at 12V. It serves as both the high beam and low beam bulb in the 2-rectangular-headlamp configuration across all model years covered. As a sealed beam unit, the entire assembly is replaced rather than an internal bulb.
The 9004 is a dual-filament halogen bulb with a P29t base, rated at 12V with a 65W high beam filament and a 45W low beam filament. Its dual-filament design allows a single bulb to handle both high and low beam functions within the halogen capsule headlamp configuration.
The 4-rectangular-headlamp configuration uses separate bulb types for high and low beam positions. The H4651 handles the high beam role, while the low beam position uses the H4652 for model years 2006-2009 and the H4656 for the 2005 model year.
The H4651, H4652, and H4656 are all 4x6-inch rectangular sealed beam units operating at 12V. Like the H6054, none of these types contain a replaceable internal bulb; the sealed beam assembly itself is the replaceable unit.
The H4652 is classified as a variant of the H4651. Despite their physical similarities as 4x6-inch sealed beam units, they are not interchangeable, as each is designated for a specific beam position within the 4-rectangular-headlamp configuration.
All bulb types specified for the Peterbilt 335 conform to ANSI standards applicable in both the United States and Canada, placing them within a standardized North American fitment framework.
The 9004 bulb type is the only non-sealed-beam option in the specifications. Unlike the H-series sealed beam units, it is a discrete halogen capsule that is replaced independently of its housing.