GTR Ultra 3 low and high beams for your Peterbilt 389
This Peterbilt 389 LED headlight bulb kit brings together white GTR Lighting Ultra 3 bulbs for both beam positions and the extended dust covers needed for the original halogen setup. It includes an H11 pair for the low beams, a 9005/HB3 pair for the high beams and two BTS extended dust covers.
Dustin, owner of BTS Lighting, personally recommends the Ultra 3 for its beam pattern and intensity. This is his product recommendation, rather than a measured output comparison or a guarantee for every headlight housing.
Exactly what is included
- Low beams: two white GTR Ultra 3 H11 bulbs — one GTR.LED801 pair.
- High beams: two white GTR Ultra 3 9005/HB3 bulbs — one GTR.LED803 pair.
- Dust covers: two BTS-85mmD extended rubber caps, the same individual covers used in our Alpha Series Peterbilt 389 kit. These correspond to one retail dust-cap pair.
Four bulbs and two dust covers in total. Each GTR bulb pair also includes its supplied Allen key. Anti-flicker modules, dielectric grease and turn-signal bulbs are not included. Dustin specifies this GTR kit without anti-flicker modules for the intended original-halogen Peterbilt 389 application; this is not a universal no-flicker claim for modified electrical systems.
Ultra 3 features
Both bulb pairs produce 5750K white light and use GTR’s custom TST 7045 emitters, Thermal Separation Technology and potted electronics. Their compact construction helps with installation planning, while the included extended caps provide additional space behind the low-beam bulbs.
- Supplier-rated power: 43W per bulb.
- Operating voltage: 9–40V DC.
- Supplier-rated output: 4,700 raw lumens per bulb; this is a light-source specification, not a measured beam or road-illumination result.
Fitment and installation checks
For 2008–2024 Peterbilt 389 trucks with original factory halogen headlights using H11 low beams and 9005 high beams. Confirm the markings on the installed bulbs before ordering. This kit does not replace complete factory LED headlights, and an aftermarket housing may require different bulbs or covers.
The two extended caps replace the original low-beam dust covers. Compare the cap opening, seating surface and available rear clearance; make sure the caps seat fully without pressing on the bulbs or wiring. Install and orient the bulbs according to GTR’s supplied instructions, secure the wiring and check headlight aim after installation.
Use the Peterbilt 389 bulb guide to identify the original bulb positions, and browse Peterbilt 389 headlights if your truck needs a complete assembly instead. The Alpha kit remains a separate product with its own included components.
Common questions
Does one kit cover both headlights?
Yes. One H11 pair covers the two low-beam positions and one 9005 pair covers the two high-beam positions. The kit also includes two extended dust caps.
Are anti-flicker modules included?
No. This kit follows Dustin’s specified GTR Ultra 3 configuration without modules. Contact BTS before ordering if the truck has replacement housings or modified wiring.
Is this a complete replacement headlight assembly?
No. This is a bulb-and-dust-cover kit for compatible original halogen housings. Headlight assemblies, turn signals and other accessories are separate.
Intended use
These LED bulbs are not compliant for public-road headlight use in the United States. Use this kit only where the intended application is permitted, and verify applicable local requirements before installation.
Warranty
The GTR Ultra 3 bulbs carry GTR Lighting’s lifetime limited manufacturer warranty, subject to its terms and authorized-dealer requirements. Modifications, alterations and misuse are excluded. If there is an installation issue, document it with photos or video and contact BTS before removing the bulbs. The bulb warranty does not extend a lifetime warranty to the dust covers.
