Looking for the correct bulb sizes for a 2020, 2021, 2022, 2023, 2024, 2025 or 2026 Chevrolet Silverado 2500HD or 3500HD? This guide covers the replaceable bulbs used in Silverado HD trucks equipped with factory halogen headlights, including the H11 low beam, H9 high beam, front turn signals, reverse lights and rear brake/turn signal bulbs.
We have also installed and tested our FUZED LED F1 Series headlight bulbs in the Silverado HD. Below you'll find our actual low-beam and high-beam lux measurements, headlight installation photos, LED fitment information and a complete installation video.
2020–2026 Chevrolet Silverado 2500HD and 3500HD trucks equipped with factory halogen headlights use an H11 low-beam bulb and an H9 high-beam bulb. Our F1 Series H11/H8/H9 LED bulb is designed to fit both applications. If you are upgrading both the low and high beams, you will need two sets of F1 Series LEDs.
How to Identify Halogen vs. Factory LED Silverado HD Headlights
Before ordering replacement headlight bulbs for your 2020–2026 Chevrolet Silverado 2500HD or 3500HD, first determine whether your truck is equipped with factory halogen headlights or factory LED headlights.
The H11 low-beam and H9 high-beam bulb sizes in this guide apply to factory halogen headlight-equipped Silverado HD trucks. Trucks equipped with the factory LED headlight assembly do not use the same replaceable H11 and H9 halogen bulbs.
Compare the factory halogen and factory LED headlight styles on 2020–2026 Chevrolet Silverado 2500HD and 3500HD trucks before ordering replacement headlight bulbs.
2020–2026 Silverado 2500HD & 3500HD Bulb Size Chart
| Location | Bulb Size | Recommended Upgrade |
|---|---|---|
| Low Beam Headlight | H11 | F1 Series LED |
| High Beam Headlight | H9 | F1 Series H11/H8/H9 LED |
| Fog Lights | Factory LED | Not replaceable with a conventional bulb |
| Front Turn Signals | 7443 | 7443 LED Turn Signals |
| Cab Clearance Lights | Factory LED Sealed Unit | Not replaceable with a conventional bulb |
| Reverse Lights | 921 | 921 LED Reverse Bulbs |
| Rear Brake / Turn Signals | 7443 | 7443 Red LED Bulbs |
| Third Brake Light | Factory LED | Not replaceable with a conventional bulb |
| Cargo Lights | Factory LED | Not replaceable with a conventional bulb |
| Interior Lighting | Factory LED | Not replaceable with a conventional bulb |
2020–2026 Silverado HD Halogen Headlight Bulbs
Silverado 2500HD and 3500HD trucks covered by this guide use two separate replaceable halogen headlight bulbs: an H11 for the low beam and an H9 for the high beam.
Although the factory H11 and H9 halogen bulbs differ in design and wattage, our F1 Series LED bulb is designed as an H11/H8/H9-compatible LED replacement. This allows the same F1 Series bulb set to be used for either the low-beam or high-beam position.
Factory Silverado HD halogen headlight bulb compared with the FUZED LED F1 Series replacement used in our installation and output testing.
2020–2026 Silverado HD H11 Low-Beam LED Upgrade
The factory halogen low-beam bulb used in the 2020–2026 Silverado HD configuration covered by this guide is H11. We use our F1 Series H11/H8/H9 LED bulbs as the low-beam upgrade.
The F1 Series is designed to provide increased usable light output while positioning the LED emitters to work with the factory headlight housing.
Shop Silverado HD H11 Low BeamsSilverado HD Low-Beam Halogen vs. LED Lux Test
Instead of relying only on advertised bulb output, we measured the light produced through the actual Silverado HD headlight housing. We tested the factory H11 halogen low beam and then repeated the measurement after installing the F1 Series LED bulb.
Factory H11 Halogen Low Beam Measured through the factory Silverado HD headlight housing.
F1 Series LED Low Beam Measured after installing the LED bulb in the same headlight housing.2020–2026 Silverado HD H9 High-Beam LED Upgrade
The factory high-beam bulb in the halogen Silverado HD headlight configuration is an H9.
You do not need a different FUZED LED bulb model for the H9 position. Our F1 Series H11/H8/H9 LED set is designed to work with the H9 high-beam application as well.
If you already purchased one F1 Series set for your H11 low beams, you will need a second set to replace the two H9 high-beam bulbs.
Shop Silverado HD H9 High BeamsSilverado HD High-Beam Halogen vs. LED Lux Test
We also measured the factory H9 high-beam output before and after installing the F1 Series LEDs. Keeping the comparison on the same truck allows the difference to be evaluated through the actual Silverado HD high-beam housing.
Factory H9 Halogen High Beam Factory high-beam output measured on our Silverado HD test truck.
F1 Series LED High Beam High-beam output measured after the F1 Series LED conversion.2020–2026 Silverado HD LED Headlight Installation
The low- and high-beam bulbs are accessed from behind the headlight assemblies. On the Silverado HD, access is gained through the inner fender area rather than removing the complete headlight assembly.
Our installation video below walks through the complete process. You can also expand the step-by-step photo instructions here.
View Step-by-Step Silverado HD Headlight Installation
1. Access the Headlight Through the Inner Fender
Begin by creating access to the rear of the headlight assembly through the inner fender area. You will need to remove five torx bit screws (Size T15) to pull the inner fender back. This provides room to reach the factory low- and high-beam bulbs from behind the housing.
2. Locate the Headlight Bulbs
With the inner fender area opened, locate the rear of the headlight housing and the bulb you are replacing. The low beam bulb is going to be on the top, above the high beam bulbs. The high beam bulbs are located on the bottom.
3. Remove the Factory Halogen Bulb
Disconnect the factory electrical connector and spin the bulb counter clockwise to remove it. Avoid touching the glass of a halogen bulb if it will be reused.
4. Install the F1 Series LED Bulb
Insert the F1 Series LED bulb into the factory bulb opening and rotate it into the locked position. Once it is locked in the wire that is on the fan should be going straight down. LED Chips should be shining horizontally (left to right). Connect the F1 Series wiring to the factory headlight connector with the positive (+) and negative (-) symbols on the same side as the locking tab on the factory connector.
5. Check the LED Bulb Installation
Make sure the bulbs are connected properly and working before putting everything back together.
Silverado HD LED Headlight Output & Beam Pattern
After installing the F1 Series bulbs, check both the low- and high-beam operation before completing reassembly. We also recommend checking the headlight pattern against a wall so you can confirm that both bulbs are properly installed and operating as intended.
2020–2026 Silverado HD after installation of the FUZED LED F1 Series headlight bulbs.
2020–2026 Silverado HD LED Headlight Installation Video
Watch our complete installation below. In this video we replace both the H11 low-beam and H9 high-beam halogen bulbs with F1 Series LEDs and measure the factory halogen and LED headlight output with a lux meter.
The video also shows how we access the bulbs, install the F1 Series LEDs and compare the resulting headlight output.
Other 2020–2026 Silverado HD Bulb Sizes
Fog Lights
The fog lights listed for the Silverado HD configuration covered by this guide are factory LED and do not use a conventional replaceable fog-light bulb.
Front Turn Signal Bulbs
The replaceable front turn-signal application covered by this guide uses a 7443 bulb.
Shop 7443 Front Turn SignalsReverse Light Bulbs
The reverse lights use a 921 bulb. Upgrading the factory reverse bulbs to white LEDs can provide additional usable light behind the truck when backing up at night.
Shop 921 Reverse LEDsRear Brake & Turn Signal Bulbs
The replaceable rear brake and turn-signal application listed for these trucks uses a 7443 bulb.
Shop 7443 Red LEDsCab Clearance Lights
The factory cab clearance lights are sealed LED units and do not use a conventional replaceable bulb.
Third Brake & Cargo Lights
The third brake light and cargo lights listed in this guide are factory LED and do not use conventional replaceable bulbs.
Interior Lights
The interior lighting covered by this guide uses factory LED lighting and is not replaceable with a conventional plug-in bulb.
2020–2026 Silverado 2500HD & 3500HD Bulb Size FAQ
What size low-beam bulb does a 2020–2026 Silverado 2500HD or 3500HD use?
Silverado 2500HD and 3500HD trucks equipped with the factory halogen headlight configuration covered by this guide use an H11 low-beam bulb.
What size high-beam bulb does a 2020–2026 Silverado HD use?
The factory halogen high beam is H9.
Can I use the same LED bulb for the H11 low beam and H9 high beam?
Yes. The FUZED LED F1 Series bulb used here is designed for H11, H8 and H9 applications. The same F1 Series product can therefore be used for the Silverado HD H11 low beam and H9 high beam.
How many F1 Series LED sets do I need for my Silverado HD?
If you want to replace both low beams and both high beams, you need two sets. One two-bulb set replaces the H11 low beams, and a second two-bulb set replaces the H9 high beams.
Do 2020–2026 Silverado HD trucks have replaceable fog-light bulbs?
The fog-light configuration covered by this guide uses factory LED fog lights rather than a conventional replaceable bulb.
What size reverse-light bulb does the Silverado HD use?
The reverse-light application listed in this guide uses a 921 bulb.
Did FUZED LED test these headlight bulbs in a Silverado HD?
Yes. We installed the F1 Series LED bulbs in a Silverado HD and measured both the factory halogen and LED low- and high-beam output using a lux meter. The actual test images and installation video are included above.
Upgrade Your 2020–2026 Silverado HD Headlights
Our F1 Series H11/H8/H9 LED bulbs can be used for both the H11 low beams and H9 high beams on the factory halogen Silverado HD headlight configuration covered in this guide.
Choose one set if you're replacing only the low beams or high beams. Choose two sets if you want to upgrade both.
Shop F1 Series H11/H8/H9 LEDs
1 comment
Gregg
Do you have pkug and play brake lights for a 2025 silverado 2500 that will not hyper flash? I do not want to have to cut into my wires and add a resistor.