Explore the Bulb Size Chart Below by Scrolling Down
| • International LT | • International Prostar |
Note. Classic sealed-beam models need separate handling from newer pod, HID, LED, or rectangular assemblies.
Accuracy and completeness are very important to us and our followers. If you notice any incorrect or missing information, please let us know so we can update the guide promptly. Your feedback is greatly appreciated.
Depending on the year of the model, some fitments may differ from the ones listed, please verify your sockets before purchasing.
Alpha amber signal bulbs: do not use this option where the signal bulb must stay continuously at its high-output level as a daytime running light. Select by the actual signal operating mode; this note does not identify which mode your truck uses.
International LT Bulb Size Chart
Use the bulb-type headlight chart below for equipment matching the LT/RH manual. Factory LED and replacement headlight assemblies need their own lamp identification.
9006 low-beam LED bulb options
Choose by the bulb marking and installed housing. Compare Alpha Series, Morimoto 2Stroke and GTR Ultra options; the Morimoto and GTR listings each contain two bulbs.
9005 high-beam LED bulb options
LED headlight conversion bulbs may not comply with FMVSS/CMVSS requirements for on-road use. Check applicable state and provincial laws before use.
Headlight, marker and signal references
| Lighting position | Manual designation |
|---|---|
| Headlight low beam | GE9006 |
| Headlight high beam | GE9005 |
| Headlight side marker | GE194 |
| Headlight parking / turn | GE3357 |
| Separate side-turn lamp, incandescent | GE3156 |
| Side-turn and marker assembly | 3599250C92 — assembly part number |
| Work light | GE4411 |
| Clearance / marker | Listed as LED with GE168 — identify the lamp |
| Rear stop / turn / tail / backup / licence plate LED group | Truck Lite Super 44 lamp family |
Source: Navistar LT/RH manual 4328701R8, September 2024 edition, printed page 306 / PDF page 322. This US/Canada manual describes the equipment listed; its publication date does not establish an all-years fitment range.
Keep GE3357 headlight parking/turn and GE3156 side-turn applications separate. The rear LED entry is a lamp family, not one replacement bulb size. The clearance entry combines an LED label with GE168, so check the installed lamp before ordering that position.
Daytime running lights: the manual describes low-beam DRL at 75% brightness. Choose any electrical interface for the actual lamp circuit; this percentage alone does not identify its waveform.
International ProStar Bulb Size Chart
For the original bulb-type headlamp described in the Navistar ProStar+ manual. Factory LED and replacement headlamp assemblies need their own service information.
Source: Navistar ProStar+ manual 3933971R5, August 2014 edition, printed page 277 / PDF 291. The edition does not define an all-years application. Its bulb chart is for the equipment described in that manual.
Philips’ application chart separately lists 9006 low/dual beam and 9005 high beam for ProStar 2008–2014 and ProStar 2015–2018 with halogen capsule headlamps. These references do not establish every 2006–2007 truck or a replacement housing’s bulb type.
The headlamp parking/turn reference is GE3357; the separate circuit chart prints 3357AK. The separate incandescent side-turn lamp is GE3156. These positions are not one generic 3157 signal group.
The ProStar+ manual lists rear LED lamps as a grouped Truck Lite Super 44 family and gives a conflicting clearance/marker entry labelled LED with GE168. Identify those lamp assemblies before choosing a bulb.
Specific United Pacific replacements 35867–35870 are all-LED with a factory-LED-harness condition; 31175–31178 and 31179/31180/31183/31184 specify H7 low/H1 high/W5W side. These are replacement-housing references, not the original 9006/9005 chart.
Browse Alpha Series, Morimoto and GTR LED options for a matching bulb-type headlamp. Check the exact bulb marking, housing and circuit before ordering.
LED headlight conversion bulbs may not comply with FMVSS/CMVSS requirements for on-road use. Check applicable state and provincial laws before use.
The Morimoto and GTR listings below each contain two bulbs. Choose the bulb size for the lighting position you are replacing.
9006 low-beam bulb options
9005 high-beam bulb options
LED electrical compatibility: choose the bulb and any interface for the actual truck and lamp circuit. The ProStar+ manual describes low-beam daytime running lights at 75% brightness. That percentage does not identify the waveform or establish a universal decoder requirement. A flicker or error-code fix depends on the installed equipment.
Due to manufacturer-specific variations, the information in the table may not be 100% accurate.
If you notice any incorrect information or have additional details to contribute, please feel free to contact us. We truly appreciate all customer feedback and input. support@btslighting.com
FAQs
Some International LED headlights do not use standard replacement bulbs. Factory LED and aftermarket LED headlight assemblies may use integrated LEDs, replaceable modules, or complete assembly replacement.
If your International LT or ProStar has LED headlights, check the headlight assembly information before ordering halogen-style replacement bulbs.
Hyper-flash usually happens when the truck detects the lower electrical load of an LED turn signal bulb and reacts as if the bulb is burned out.
Depending on the International model and signal circuit, you may need a compatible LED bulb, load resistor, LED-compatible flasher, or another approved fix for that application.
The best way to verify the correct International bulb is to remove the original bulb and read the number printed on it. You can also check the headlight or fog light assembly label, VIN, or line set ticket.
For modified trucks, photos of the bulb, connector, socket, and light assembly are often the fastest way to confirm fitment.
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