Explore the Bulb Size Chart Below by Scrolling Down
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.
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2008–2024 Peterbilt 389 LED Headlight Bulb Kit – Alpha Series ReadyFit Upgrade
US$500.00 -
3157 - Alpha Series Amber Signal Light Bulbs
US$75.00
Peterbilt 359 Bulb Size Chart
Match the headlamp already fitted to your 359: its shape, lens marking and low/high-beam function determine the replacement. A sealed-beam lamp is replaced as a complete unit; a conversion housing can use a different serviceable bulb.
5.75-inch round LED headlamp options
Choose the Holley Hi/Lo lamp for a combined-beam position or the High Beam Only version for a dedicated high beam. Each listing supplies one lamp.
4×6 rectangular LED headlamp options
For a truck already fitted with this rectangular format, compare the separate Hi/Lo and High Beam Only units. Match the installed lens marking, mounting and circuit before ordering; the number of lamps on the truck does not make all positions the same part.
| Lighting equipment / position | Bulb or lamp specification |
|---|---|
| 5.75-inch round, four-lamp system — combined-beam position | Holley installation reference: 2C1; H4000/H4040/H5006; three terminals |
| 5.75-inch round, four-lamp system — dedicated high beam | Holley installation reference: 1C1; H4001/H5001; two terminals |
| Replacement housing with removable bulb | Use that housing’s bulb marking and instructions; its plug alone does not establish an H4 bulb requirement. |
United Pacific also lists complete LED options specifically for the 1967–1987 359. Its 35827/35828 modules fit inside the OE 359 housing and require wiring to the truck harness; its complete side assemblies are separate products. These LED assembly specifications do not identify the original truck’s replaceable bulb sizes.
For signal, marker and rear lamps, match the individual lamp or installed bulb marking. Their size is not determined by the headlight conversion.
References: Holley RetroBright 5.75-inch installation guide, page 2; United Pacific 2022 catalog, printed 24–26. Follow the lamp manufacturer’s circuit-identification and aiming instructions.
Peterbilt 379 Bulb Size Chart
The 379 uses several headlamp configurations. Choose by the installed lamp format: Philips lists H6054, H4656/H4651 and 9004 alternatives for 2002–2007 equipment.
Sealed-format LED headlamp options
Match H6054 equipment to the 5×7 Hi/Lo format; four-rectangular-lamp equipment uses distinct 4×6 Hi/Lo and High Beam Only positions. These Holley listings are sold individually.
Starr serviceable halogen conversion housings
For the matching 379 four-rectangular-lamp setup, STARR-HR4656 replaces the H4656 low/dual-beam unit and includes a 9007 halogen bulb. STARR-HR4651 replaces the H4651 high-beam unit and includes a 9005 halogen bulb. Each package contains one housing, one preinstalled bulb and its wiring adapter. The 9007/9005 sizes belong to these exact conversion housings.
| Lighting equipment / position | Bulb or lamp specification |
|---|---|
| 2002–2007 — two rectangular headlamps | H6054 low/dual beam |
| 2002–2007 — four rectangular headlamps | H4656 low/dual beam; H4651 high beam |
| 2002–2007 — halogen capsule headlamps | 9004 low/dual beam |
| 2002–2007 — model-row stop lamp | 2057 (stop lamp; no turn-signal assignment) |
If your truck has a serviceable 9004 capsule housing, compare Alpha 9004 conversion bundle, GTR 9007/9004 and Morimoto 9007/9004. Configure the replacement for the original 9004 connection. The Alpha bundle contains two A1006 bulbs and two 9004-to-9007 adaptors; its double-fan bulbs are not compatible with standard universal housings.
United Pacific’s complete LED dual 4×6 assemblies are another distinct configuration. Their turn/position functions can require additional wiring and do not use the Starr capsule specification. For other years or changed housings, identify the fitted part before using one of these chart entries.
LED headlight conversion bulbs may not comply with FMVSS/CMVSS requirements for on-road use. Check applicable state and provincial laws before use. Follow the selected product’s installation instructions and stated intended use.
References: Philips 2022 application catalog, printed 384; United Pacific 2022 headlight catalog, printed 41, 42. Philips is a bulb-manufacturer application guide; United Pacific specifications apply to the identified replacement assemblies.
Peterbilt 384 Bulb Size Chart
For 2008–2009, identify the installed sealed-beam or 9004 capsule equipment. The 2011–2016 Philips model row lists 9007. BTS has now confirmed that the original 2010 headlight uses a 9007 dual-beam bulb and is the same headlight used on the 386. One dual-beam bulb serves both low and high functions; these are not separate bulb positions.
9004 and 9007 LED bulb options
Choose the connection that matches the installed bulb. GTR and Morimoto market the shown products for 9007/9004 applications; follow their configuration instructions. The two Alpha choices are listed separately below.
Alpha housing limit: the 9004 bundle supplies two A1006 9007 bulbs and two 9004-to-9007 adaptors. The double-fan A1006 bulbs are not compatible with standard universal housings; the adaptors do not change that clearance limit. The GTR and Morimoto packages each contain two bulbs.
LED headlight conversion bulbs may not comply with FMVSS/CMVSS requirements for on-road use. Check applicable state and provincial laws before use. Follow the selected product’s installation instructions and stated intended use.
| Lighting equipment / position | Bulb or lamp specification |
|---|---|
| 2008–2009 — two rectangular headlamps | H6054 low/dual beam |
| 2008–2009 — four rectangular headlamps | H4656 low/dual beam; H4651 high beam |
| 2008–2009 — halogen capsule headlamps | 9004 low/dual beam |
| 2008–2009 — model-row stop lamp | 2057 (stop lamp; no turn-signal assignment) |
| 2010 — original bulb-type headlamp, BTS owner confirmation | 9007 low/dual beam — same headlight as the 386 |
| 2011–2016 — model-row headlamp | 9007 low/dual beam |
| 2011–2016 — model-row stop lamp | 1157 (stop lamp) |
For sealed-format equipment, use the correct 5×7 Hi/Lo or 4×6 Hi/Lo and 4×6 High Beam Only lamp. Those complete lamps are sold individually. The stop-lamp entry does not identify the front turn-signal bulb.
Identified United Pacific replacement housings
For UPI housings listed for 2007–2014 384, use the assembly part number: 35808/35809 and 35810/35811 use H11 low/HB3 high; 35765/35766 use H7 low/H7 high. Other UPI versions use integrated LED headlamps. These are replacement-assembly applications, not an extension of the original-equipment chart.
References: Philips 2022 application catalog, printed 384; United Pacific 2022 headlight catalog, printed 22, 23, 24. Philips is a bulb-manufacturer application guide; United Pacific specifications apply to the identified replacement assemblies.
Peterbilt 386 Bulb Size Chart
Identify the installed headlamp before choosing a bulb. Philips lists the early halogen-capsule configuration separately; BTS has confirmed the 2010 9007 application.
Philips also lists sealed-beam configurations for 2006–2009. Match the actual assembly and bulb rather than choosing by year alone. Signal and marker bulbs require the specification for the installed lamp.
Catalog source: Philips 2022 application catalog, printed page 384. The 2010 row is based on BTS owner confirmation.
Replacement headlamps: United Pacific 35841/35842 are all-LED assemblies listed for 2005–2015 386 trucks. Those assemblies use their own lighting components; their vehicle fitment does not make them a 9004 or 9007 bulb application.
Shop for your confirmed bulb and housing
The Alpha 9004 listing is a conversion kit using 9007 LEDs with 9004 adapters. The Alpha 9007 listing uses a double-fan design and excludes standard universal housings; compare its dimensions and clearance with your headlamp.
LED headlight conversion bulbs may not comply with FMVSS/CMVSS requirements for on-road use. Check applicable state and provincial laws before use.
Peterbilt 387 Bulb Size Chart
For 2002–2009, Philips lists 9004 for halogen capsule headlamps, with separate sealed-beam alternatives. A later conversion housing can use a different bulb.
9004 LED bulb options
These are 9004-family shopping options for a matching serviceable capsule housing. Configure the GTR or Morimoto 9007/9004 product for the original connection.
Alpha housing limit: the 9004 bundle supplies two A1006 9007 bulbs and two 9004-to-9007 adaptors. The double-fan A1006 bulbs are not compatible with standard universal housings; the adaptors do not change that clearance limit. The GTR and Morimoto packages each contain two bulbs.
LED headlight conversion bulbs may not comply with FMVSS/CMVSS requirements for on-road use. Check applicable state and provincial laws before use. Follow the selected product’s installation instructions and stated intended use.
| Lighting equipment / position | Bulb or lamp specification |
|---|---|
| 2002–2009 — two rectangular headlamps | H6054 low/dual beam |
| 2002–2009 — four rectangular headlamps | H4656 low/dual beam; H4651 high beam |
| 2002–2009 — halogen capsule headlamps | 9004 low/dual beam |
| 2002–2009 — model-row stop lamp | 2057 (stop lamp; no turn-signal assignment) |
For sealed-format equipment, use the correct 5×7 Hi/Lo or 4×6 Hi/Lo and 4×6 High Beam Only lamp. Those complete lamps are sold individually. The stop-lamp entry does not identify the front turn-signal bulb.
Identified United Pacific replacement housings
For UPI housings listed for 1999–2010 387, use the assembly part number: 35808/35809 and 35810/35811 use H11 low/HB3 high; 35765/35766 use H7 low/H7 high. Other UPI versions use integrated LED headlamps. These are replacement-assembly applications, not an extension of the original-equipment chart.
References: Philips 2022 application catalog, printed 384; United Pacific 2022 headlight catalog, printed 22, 23, 24. Philips is a bulb-manufacturer application guide; United Pacific specifications apply to the identified replacement assemblies.
Peterbilt 388 Bulb Size Chart
3157/4157 signal options for all Peterbilt 388 model years
BTS confirms its tested 3157/4157 front signal, parking and marker fitment for all model years of the Peterbilt 388 with the original serviceable bulb configuration. The combined group uses four bulbs — two pairs total. Do not count four bulbs separately for each shared function. Choose amber output.
Alpha 3157 Amber pair · Morimoto 3157 Amber pair · GTR Carbide 2.0 Non-CK Amber pair · GTR Carbide 2.0 CK Amber pair.
Alpha is BTS’s preferred option when the high-power signal circuit is not held on as a DRL. Do not use Alpha signal bulbs for continuously energized high-power DRL operation. Morimoto separately excludes PWM-driven DRL circuits. For GTR, choose the matching CK or Non-CK Amber wiring version; the model-year statement does not select a wiring version.
Peterbilt 389 Bulb Size Chart
BTS-tested signal quantity: four 3157/4157 bulbs, so order two pairs. Choose amber for the front signal/parking/marker lamps. Alpha amber bulbs are BTS’s preferred option when the high-power signal circuit is not held on as a DRL. Do not use Alpha signal bulbs for continuously energized high-power DRL operation.
Peterbilt 567 Bulb Size Chart
Match the lighting equipment fitted to your Peterbilt 567. These are Peterbilt’s listed factory lamp specifications; replacement housings and factory LED options can differ.
The manual says the long-life version is optional for both headlamp types. One 4157NAK bulb performs the combined turn, parking and side-marker functions; BTS confirms four bulbs for the signal/parking/marker group. Factory LED headlights require their own module or assembly service information; the halogen bulb codes above do not apply.
Shopping for LED signal bulbs? The original 4157NAK specification belongs to the 3157/4157 LED replacement family. Choose amber output for the front signal, parking and marker functions, with the socket-wiring and DRL compatibility specified by the selected LED product.
Sources: Peterbilt 567 2021 operator manual, Peterbilt 567 2024 operator manual and January 2026 edition, Vehicle Light Bulb Specifications. These document editions do not establish an all-year fitment range.
Alpha kit for the matching H11 / 9005 configuration
The Peterbilt 567 Alpha kit below contains two H11 low-beam bulbs, two 9005 high-beam bulbs and a pair of extended low-beam dust caps. Compare it with a fitted headlight that specifically accepts H11 low-beam and 9005 high-beam bulbs. BTS has tested its current 9005 LED offerings in the original HB3A-LL high-beam housings and confirms a direct fit without clearance issues. This kit does not replace a complete factory LED headlight.
PACCAR headlamp restriction: Peterbilt instructs owners not to install LED replacement light sources in PACCAR headlamps because the internal optics can cause an incorrect replacement light source to overheat, creating a fire risk. Matching a bulb socket does not override this restriction. See the manufacturer’s headlamp warning before considering a conversion.
Shop Peterbilt 567 9005 LED high beams
BTS-tested high-beam fit: the original Peterbilt 567 halogen specification is HB3A-LL; shop 9005 LED high-beam replacements. BTS has confirmed that its current Alpha, Morimoto and GTR 9005 offerings fit the original high-beam housings without clearance issues. The original code is retained for reference; it does not require a separate LED shopping size.
Choose from Alpha, Morimoto 2Stroke 4.0 and GTR Ultra 3.0 below. The Morimoto and GTR listings each contain two bulbs. These high-beam products are separate from the signal bulbs.
Shop amber 3157/4157 LED signal bulbs
BTS-tested quantity: four signal/parking/marker bulbs — order two pairs. The Alpha and Morimoto amber options below are each sold as a pair. These four signal bulbs are separate from the four headlight bulbs and included dust covers in the base Alpha headlight kit.
BTS recommendation: choose Alpha for bright, reliable signal operation when the high-power signal circuit is not held on as a daytime running light. Alpha signal bulbs do not reduce their high-power output during sustained operation; do not use them for a continuously energized high-power signal DRL.
Morimoto XB alternative: supports standard and CK sockets. BTS has tested its protective output reduction during sustained signal-DRL operation on the T880 and W990. Morimoto separately excludes PWM-driven DRL circuits; contact BTS if that is your setup.
Peterbilt 579 Bulb Size Chart
2024 original-equipment reference. This table follows the 2024 Model 579 operator manual. Match the installed halogen or factory LED equipment; the table does not establish the same bulbs for every model year.
The manual lists 4157K for the daytime-running, position and turn functions; its headlamp illustration shows separate turn and DRL/parking sockets. Identify the lamp you are replacing. Factory LED headlamps require their own service information.
For a replaceable amber turn or parking lamp in this family, shop 3157/4157 amber LED signal bulbs. Match the socket contacts, lamp function and required colour. Check daytime-running-light suitability separately.
Source: 2024 Model 579 operator manual, page 324; headlamp illustration on page 287. Confirm the installed bulb designation before selecting the 9005 listing below.
Identified replacement headlamps differ: United Pacific lists H9 low / H1 high for assemblies 35812–35815, separate H7 low / H7 high for 35779–35782, and all-LED lighting for 35745–35748. These are specific replacement assemblies listed for 2012–2021 579 trucks, not factory bulb defaults. UPI assembly reference, printed pages 21–22.
Browse H11 or 9005 bulbs for a matching installed housing
The listings below are the existing Alpha H11 and 9005 products. Choose them only for a compatible, serviceable lamp that requires the listed bulb type; they do not replace a complete factory LED headlamp.
Peterbilt headlamp instruction: LED replacement light sources are not approved for use in PACCAR headlamps. Incorrect bulb types can overheat because of the headlamp’s internal optics and may cause a fire; matching a socket does not override this instruction.
LED headlight conversion bulbs may not comply with FMVSS/CMVSS requirements for on-road use. Check applicable state and provincial laws before use.
Peterbilt 587 Bulb Size Chart
For 2011–2018, Philips lists H11 low beam and 9005XS high beam in its 587 model row. Identify whether the truck still has halogen capsules, an HID system or a replacement headlamp assembly.
9005 LED high beams for the original 9005XS housing
BTS has confirmed that our current Alpha, Morimoto and GTR 9005 LEDs fit the Peterbilt 587’s original 9005XS high-beam housing without connector or clearance changes. The Philips reference remains 9005XS; this is a separate confirmation of the LED replacements shown. Use this option for that original high-beam housing, not the different UPI assemblies listed below.
Alpha 9005 · Morimoto 2Stroke 4.0 9005 pair · GTR Ultra 3.0 9005 pair.
H11 LED low-beam options
For a matching serviceable H11 halogen low beam, compare Alpha, GTR and Morimoto options. These bulbs do not replace an HID system or an integrated LED headlamp. Check the selected product’s connector, mounting and cooling dimensions against the fitted housing.
LED headlight conversion bulbs may not comply with FMVSS/CMVSS requirements for on-road use. Check applicable state and provincial laws before use. Follow the selected product’s installation instructions and stated intended use.
| Lighting equipment / position | Bulb or lamp specification |
|---|---|
| 2011–2018 — 587 model-row low beam | H11 |
| 2011–2018 — 587 model-row high beam | 9005XS — preserve the XS designation when matching the installed bulb and connector |
| 2011–2018 — halogen-capsule low beam | H11 |
| 2011–2018 — model-row stop lamp | 1157 (stop lamp; not a front-turn assignment) |
| HID-equipped headlamp | Identify the actual HID bulb and housing. The catalog’s HID-labelled low-beam cell is inconsistent and is not used here as an H11 replacement instruction. |
Bulbs inside identified UPI replacement headlamps
| Lighting equipment / position | Bulb or lamp specification |
|---|---|
| UPI 35812/35813 or 35814/35815; listed 587, 2010–2016 | H9 low beam; H1 high beam; LED turn/position |
| UPI 35779/35780 or 35781/35782; listed 587, 2010–2016 | H7 low beam; H7 high beam; LED turn/DRL |
| UPI 35745/35746 or 35747/35748; listed 587, 2010–2016 | Integrated LED headlamps, turn, position and marker |
The H9 and H7 references above belong to those replacement assemblies. Do not substitute their specifications for the H11/9005XS chart or infer a 3157 signal bulb from the headlamp model.
If the installed housing is one of the identified H7 versions, Alpha H7 is a bulb-family option to compare with its mounting and cooling space. That listing currently shows backorder with an unknown ETA.
References: Philips 2022 application catalog, printed 384; United Pacific 2022 headlight catalog, printed 21, 22. Philips is a bulb-manufacturer application guide; United Pacific specifications apply to the identified replacement assemblies.
Peterbilt 589 Bulb Size Chart
Match the lighting equipment fitted to your Peterbilt 589. These are Peterbilt’s listed factory lamp specifications; replacement housings and factory LED options can differ.
The manual says the long-life version is optional for both headlamp types. One 4157NAK bulb performs the combined turn, parking and side-marker functions; BTS confirms four bulbs for the signal/parking/marker group. Factory LED headlights require their own module or assembly service information; the halogen bulb codes above do not apply.
Shopping for LED signal bulbs? The original 4157NAK specification belongs to the 3157/4157 LED replacement family. Choose amber output for the front signal, parking and marker functions, with the socket-wiring and DRL compatibility specified by the selected LED product.
Sources: Peterbilt 589 2024 operator manual and January 2026 edition, Vehicle Light Bulb Specifications. These document editions do not establish an all-year fitment range.
Alpha kit for the matching H11 / 9005 configuration
The Peterbilt 589 Alpha kit below contains two H11 low-beam bulbs, two 9005 high-beam bulbs and a pair of extended low-beam dust caps. Compare it with a fitted headlight that specifically accepts H11 low-beam and 9005 high-beam bulbs. BTS has tested its current 9005 LED offerings in the original HB3A-LL high-beam housings and confirms a direct fit without clearance issues. This kit does not replace a complete factory LED headlight.
PACCAR headlamp restriction: Peterbilt instructs owners not to install LED replacement light sources in PACCAR headlamps because the internal optics can cause an incorrect replacement light source to overheat, creating a fire risk. Matching a bulb socket does not override this restriction. See the manufacturer’s headlamp warning before considering a conversion.
Shop Peterbilt 589 9005 LED high beams
BTS-tested high-beam fit: the original Peterbilt 589 halogen specification is HB3A-LL; shop 9005 LED high-beam replacements. BTS has confirmed that its current Alpha, Morimoto and GTR 9005 offerings fit the original high-beam housings without clearance issues. The original code is retained for reference; it does not require a separate LED shopping size.
Choose from Alpha, Morimoto 2Stroke 4.0 and GTR Ultra 3.0 below. The Morimoto and GTR listings each contain two bulbs. These high-beam products are separate from the signal bulbs.
Shop amber 3157/4157 LED signal bulbs
BTS-tested quantity: four signal/parking/marker bulbs — order two pairs. The Alpha and Morimoto amber options below are each sold as a pair. These four signal bulbs are separate from the four headlight bulbs and included dust covers in the base Alpha headlight kit.
BTS recommendation: choose Alpha for bright, reliable signal operation when the high-power signal circuit is not held on as a daytime running light. Alpha signal bulbs do not reduce their high-power output during sustained operation; do not use them for a continuously energized high-power signal DRL.
Morimoto XB alternative: supports standard and CK sockets. BTS has tested its protective output reduction during sustained signal-DRL operation on the T880 and W990. Morimoto separately excludes PWM-driven DRL circuits; contact BTS if that is your setup.
LED Bulb Replacement
Most LED low-beam installations on the Peterbilt 388, 389, 567 and 589 require BTS extended dust covers. A pair is already included in each Alpha ReadyFit kit shown for the 567 and 589; these kits do not need an additional pair. For a compatible standalone-bulb installation, compare the fitted headlight, cap opening and available clearance before ordering separate covers. LED headlight conversion bulbs may not comply with FMVSS/CMVSS requirements for on-road use. Check applicable state and provincial laws before use.
Alpha PWM modules may help with flicker from a compatible pulse-width-modulated lighting supply. Match the connector and circuit requirements, check power and ground, and follow the bulb installation guidance. A module is not required for every installation and cannot fix every bulb-out warning, wiring fault or unsuitable headlight configuration.
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
Your Peterbilt bulb size depends on the model, year, headlight assembly, and whether the truck has halogen, HID, LED, sealed-beam, or aftermarket lights. Always check the bulb printed on the original lamp, your headlight housing, or the product fitment notes before ordering.
Some Peterbilt LED headlights do not use traditional replaceable bulbs. Factory LED or aftermarket LED headlight assemblies may use integrated LEDs, replaceable modules, or complete assembly replacement instead.
Some Peterbilt trucks may need resistors, anti-flicker modules, or decoders when switching from halogen to LED bulbs, but it depends on the truck, bulb position, and lighting system.
The best way to verify a Peterbilt bulb is to remove the original bulb and read the number printed on it. You can also check the headlight assembly label, the truck’s service information, or contact support with the year, model, VIN, and photos of the light.
For modified trucks, photos are especially helpful. Many Peterbilt trucks have aftermarket headlights, custom bumpers, LED cab lights, or replacement signal housings that change the correct bulb.
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