Compare replacement lamps, complete headlight assemblies and related lighting parts for your Peterbilt 379. Match the installed housing, lamp shape, beam function and electrical connection before choosing.
Check the listed application and selected side, especially if the headlights have been changed. Review the package contents to confirm which lamps, mounting parts and wiring components are included.
Compare the assembly or lamp you need first, then confirm the fitment and supplied components. Keep replacement housings, individual lamps and loose bulbs distinct when planning the job.
Match the product’s listed years, lamp shape, mounting points and available space to the equipment currently fitted. A Peterbilt 379 model name is a starting point; previous housing changes can affect which replacement is suitable.
Compare low-beam, high-beam and combined low/high options separately. A shared 4×6 size does not establish the correct beam function or electrical connection. Check the exact selected lamp rather than relying only on its appearance.
An integrated LED assembly has its own light source. A replaceable-bulb housing specifies a separate bulb type. Confirm the housing accepts the intended bulb and application before selecting an LED bulb; loose bulbs and complete LED assemblies are different purchases.
Check connector, operating voltage and any harness, adapter, mounting arm or bracket requirements. Review whether the item is one lamp, a selected-side assembly or a pair. Use the exact product’s installation instructions, aiming guidance and stated application restrictions.
Start with the lamps and housings currently installed on your truck. Match the product's listed application, lamp shape, low- or high-beam function, mounting and connector. If the housings have been changed, check the replacement assembly's requirements rather than relying on the truck model alone.
The quantity depends on the product and selected option. A listing may supply one lamp, one driver- or passenger-side assembly, or a pair. Read the contents and choose the required side before ordering; a photograph showing both sides does not establish the package quantity.
Check the exact assembly. A replaceable-bulb housing has a specified bulb type; an integrated LED headlight has its own light source. Match the bulb and application stated for the housing. Browse LED headlight bulbs when your housing accepts a separate replacement bulb.
Use the exact product's specifications and instructions for its connector, operating voltage, mounting, aiming and any adapters or harnesses. Read its stated markings and application restrictions, including any auxiliary colour modes. Requirements apply to the selected headlight; they are not identical across every product in this category.
Choose the beam function specified for the lamp position and lighting system. High-beam, low-beam and combined-function products can have different optics and connections even when their nominal dimensions match. Follow the selected product’s instructions.
Compare the main light source separately from the position light, daytime-running light or turn signal. Read the product description for each lighting function; an LED accent does not establish the main beam’s light source.
