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LED Brake, Tail & Turn Signal Bulbs for Trucks | Silverado, Sierra & Ford F-Series

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LED Turn Signal, Brake & Tail Light Bulbs Engineered for Trucks and SUVs

Underground Lighting collection is dedicated to LED signalling and rear lighting bulbs, including turn signal lights, or direction indicators, brake lights, tail lights, and reverse lights used in cars, SUVs, and full-size trucks. These lights perform safety-critical functions such as turning, lane changing, braking, merging, and hazard indication, where visibility, response time, and legal color compliance are mandatory.

All products use solid-state LED modules that produce light through electroluminescence at a semiconductor p-n junction, eliminating the filaments found in halogen bulbs. This enables instant illumination, consistent brightness, and long service life. Compared to halogen signal bulbs, LED turn signals activate milliseconds faster, improving reaction time for vehicles behind you. 

The collection includes front, rear, and vehicle-specific LED turn signals with a built in resistor and tail light bulbs for popular truck platforms such as Chevrolet Silverado (1999–2024), GMC Sierra (1999–2021), and Ford F-Series / F-150 / F-250 (1997–2025). Both front turn signal and rear brake/turn signal positions are covered, along with reverse backup bulbs and tail/marker light LEDs.

Supported bulb bases include 3156, 3157, 7440, 7443, 7444, 1156, 1157, PY21 (7507), WT21 (4257) and related variants. These bases replace traditional dual-filament halogen bulbs, with LED circuitry designed to emulate OEM flashing logic. CANbus-compatible LED bulbs are included to prevent hyperflash, dashboard warnings, and fast blinking caused by lower LED resistance. Still not convinced, click here to read more about upgrading to LED indicator lights or blinkers

All turn signal LEDs emit regulated amber light, while brake and tail lights emit red, complying with DOT / SAE / FMVSS color mandates. Flash rate remains within the legally required 60–120 flashes per minute when CANbus or load-corrected bulbs are used.

Still confused, contact our experts and find the right fit for your vehicle. We’re just a click away!

6 Data-Driven Benefits of LED Brake, Tail & Turn Signal Bulbs

  • Faster Illumination Improves Reaction Time

    LED turn signal and brake bulbs activate instantly, unlike halogen filaments that require a heat-up time. Faster illumination improves following-driver reaction time during braking and lane changes.

  • Clear Amber & Red Output for Legal Compliance

    All turn signal bulbs emit regulated amber, and brake/tail bulbs emit regulated red, meeting traffic law color mandates enforced by DOT, SAE, and FMVSS standards.

  • Wide Visibility Angle Enhances Signalling

    LED modules distribute light across a wide viewing angle, improving visibility from the side, rear, and adjacent lanes—critical for merging and turning safety.

  • CANbus Error-Free Operation Prevents Hyperflash

    CANbus-compatible bulbs maintain correct electrical load, preventing hyperflash, fast blinking, and dashboard indicator errors common when converting from halogen to LED.

  • 25,000–50,000+ Hour Service Life

    LED signalling bulbs last up to 50× longer than halogen (400–1,000 hours), reducing bulb failure, maintenance frequency, and downtime.

  • Improved Styling Without Sacrificing Function & Weather Resistant

    Reliable weather proof LED tail and turn signal bulbs provide a clean, modern appearance while maintaining OEM signalling behaviour, avoiding the visibility and legality issues of poorly designed aftermarket lights.

How to Find Out Which Replacement Turn Signal Bulb or Brake Light Bulb You Need

Start by identifying your vehicle's specific bulb requirements to ensure compatibility and optimal performance.

Check your bulb number in three quick steps:

  1. Locate your current turn signal bulb or brake lightbulb, carefully remove it from the housing, and check the part number on its base. Common bulb sizes are 1156, 1157, 7440, 7443, 3157, and 3156. Each type has specific base configurations and electrical requirements that must match your vehicle's specifications.
  2. Enter your vehicle's year, make, and model into our fitment finder to verify the exact bulb you need. You can also check the maintenance section in your owner's manual.
  3. Choose your LED turn signal bulb or LED brake light bulb with confidence. Our Fit Guarantee ensures you'll receive the correct bulb that perfectly matches your vehicle's specifications.

Do you need help choosing the right LED light? Our customer service team is ready to help you identify the perfect LED brake light or turn signal bulb for your specific vehicle.

Are you looking for brake lights and turn signal bulbs for your vehicle? Use our vehicle part search today!

Frequently Asked Questions: LED Brake Lights and Turn Signal Lights

Will LED brake lights fit my vehicle?

Yes, most vehicles accept LED brake lights as long as you match the correct bulb size. Check your current bulb number to confirm the exact style your car uses.

Are LED brake lights brighter than stock bulbs?

Yes. LED brake lights create a stronger, clearer burst of light that often stands out faster to other drivers. This makes your signals easier to see in daylight, at night, and in poor weather.

Do LED brake lights need resistors?

Some vehicles need resistors when switching from incandescent to LED, especially if the electrical system expects a higher load. A resistor helps prevent rapid blinking or warning messages.

How long do LED brake lights usually last?

LED brake lights last far longer than standard bulbs. Many users see years of steady performance because LEDs run cooler and use energy much more efficiently.

How do you know which turn signal bulb is out?

When your turn signal starts blinking faster than normal (known as "hyper-flashing"), it usually indicates a burned-out bulb.
To identify which one isn't working properly, switch on your hazard lights and walk around your vehicle; the non-functioning bulb will be obvious. You can also activate your turn signals while parked next to a reflective surface like a wall or window, making it easy to spot which side isn't working.

Are all turn signal bulbs the same?

No, they are not all the same. Each vehicle uses different part numbers, which will vary by manufacturer. LED turn signal bulbs are the most popular choice when replacing factory-standard bulbs, as they project a brighter, longer-lasting, and more energy-efficient light.

Do turn signal LED bulbs need a resistor?

Most vehicles require one resistor per bulb when upgrading to LED bulbs. They need a resistor because they draw significantly less power than traditional bulbs, which can cause incorrect flash rates.
However, some LED bulbs, like our 3157 LEDs with built-in resistors, eliminate the need for separate installation. The advantages of 3157 LED turn signal bulbs with built-in resistors are easier installation and guaranteed proper operation without additional components.

Why is my blinker going twice as fast?

If you've noticed that your LED turn signal bulbs are flashing too fast, this is a signal from your vehicle that your blinker bulb(s) are going out and need to be replaced as soon as possible. Not only is the rapidly blinking light and noise annoying, but it is also a warning to you to take action as a responsible driver before you either receive a ticket or the bulb goes out completely, resulting in a possible roadside accident.

How do turn signal bulbs work?

When the driver activates the turn signal through the vehicle's controls, an electric current signals the bulb. This current flows through the filament (incandescent bulbs) or the semiconductor material (LED bulbs), generating light. A relay controls the flashing pattern, which causes the light to blink consistently.

How much does it cost to replace a blinker bulb?

The cost can be an immediate concern when it’s time to replace a failing or completely dead blinker bulb (or both!). However, longer-lasting, more energy-efficient turn signal bulbs that project the perfect amount of light output without casting a blinding glare on other drivers are well worth the investment. We have LED turn signal bulbs starting at $39.99 that burn brighter and last longer than other retailers.

What's the difference between switchback LED bulbs and regular LED turn signal lights?

Based on their design, switchback LED bulbs and regular LED turn signal lights have different functions. Switchback bulbs operate in two colors - white when the turn signal is off, functioning as a daytime running light, and amber-yellow when it's activated. Regular LED turn signal bulbs operate in a single color, illuminating only when the turn signal is engaged.

What are the best LED Lights for turn signals?

When you're choosing the best LED turn signal bulbs, look for bulbs that offer proper heat management, consistent light output, and appropriate beam patterns. Important features include durable construction, efficient cooling systems, and compatibility with your vehicle's electrical system. Consider factors like brightness levels, color accuracy, and whether you need anti hyper-flash.

How long do LED turn signal bulbs last?

LED turn signal bulbs typically operate for 30,000 to 50,000 hours under normal conditions. This extended lifespan means fewer replacements than traditional halogen bulbs, as LEDs are built to withstand vibration and varying weather conditions.
You can maintain your turn signal bulbs by keeping the housing clean and ensuring proper electrical connections. While they cost more initially, their durability and efficiency often make them a practical choice for many vehicles.

Should I choose LED or halogen lights for my car?

If you compare LED vs halogen bulbs, you’ll notice each type offers distinct characteristics for your vehicle lighting needs. Halogen bulbs provide traditional lighting performance at a lower initial cost, whereas LED bulbs deliver brighter illumination, operate more efficiently, and typically last significantly longer than halogens.
When making your choice, think about your regular driving conditions, budget requirements, and vehicle compatibility. Some vehicles may require additional components for LED installation, while others are designed for simple plug-and-play operation.

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