Diode Dynamics LED Sequential Sidemarkers - GMC Sierra HD

 

Diode Dynamics LED Sequential Sidemarkers is built for GMC Sierra HD owners who want a modern replacement for the factory fender sidemarker lamps. It gives customers a focused upgrade that looks intentional on the vehicle, supports the original lighting or mounting layout, and adds the kind of detail that makes a build feel complete without unnecessary clutter.

The illuminated housing creates a brighter, more complete appearance than a small factory-style marker point, and the animated startup sequence adds a premium visual detail every time the lamps activate. The result is a practical upgrade for drivers who want cleaner styling, better placement, or more useful lighting performance while keeping the product matched to the vehicle or accessory it supports.

OEM-grade retroreflector optics, automotive-grade construction, and a dual-lens housing help the lamps blend into the bodywork while adding a distinct LED signature. The design keeps daily drivability in mind, so the upgrade feels at home on work trucks, trail builds, weekend adventure vehicles, and clean street-driven setups.

Clear, amber, and smoked lens choices give customers a way to coordinate the sidemarker appearance with factory lighting, dark trim, chrome accents, or a more custom front and side profile. Rather than forcing customers into one narrow setup, the available configurations help match the look, output, mounting style, or application to the way the vehicle is used.

Fitment is matched to selected GMC Sierra HD 2500 and 3500 applications across 2020-2026 model-year ranges. The plug-and-play design uses replacement sidemarker assemblies and included harness components, with no modification needed for standard installation.

Whether customers are upgrading for updated GMC Sierra HD styling, clearer fender presence, or a more distinctive sequential signaling look, the Diode Dynamics LED Sequential Sidemarkers delivers a purposeful improvement with clean appearance and dependable utility. Now Available at LEER!

 

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Features & Specifications

Product Type: Side marker light assembly

Brand: Diode Dynamics

Vehicle Fitment: GMC Sierra HD 2500 and 3500 applications

Lens Colors: Clear, Amber, and Smoked

Operating Voltage: 9-16V

Measured Output: Parking light output ranges from 6-30 lm and turn output ranges from 15-200 lm by lens selection

Input Power: Parking function ranges from 1.28-2.1W and turn function is 4.5W

Operating Temperature: -40C to 85C

Street Legal: Yes

Functionality:

• Updates the factory fender sidemarker lamps with LED assemblies
• Adds a fully illuminated housing for a more complete side lighting signature
• Supports an animated startup effect for added visual interest
• Provides sequential amber turn signal operation with the included harness components
• Lets customers choose clear, amber, or smoked lenses to match the vehicle's look
• Uses plug-and-play installation for a clean upgrade path
• Maintains an OEM-style fit and finish on compatible Sierra HD applications

 

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Available Options

The Diode Dynamics LED Sequential Sidemarkers are available in multiple lens configurations:

• Clear Lens - keeps the housing bright and clean while maintaining amber signaling output.
• Amber Lens - delivers a factory-inspired sidemarker look with a warm amber appearance.
• Smoked Lens - creates a darker exterior appearance for customers who prefer blacked-out styling.
• 2020-2023 and 2024-2026 Applications - supports different GMC Sierra HD fender-light designs by selected vehicle fitment.

Choose Clear for a crisp lens appearance, Amber for a traditional marker look, or Smoked for a darker custom style.

 

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Why Choose

This product is ideal for customers who want a direct LED sidemarker upgrade with distinctive styling and application-specific fitment.

• Updates the factory fender lighting with a premium LED appearance
• Improves the visual width of the sidemarker housing when illuminated
• Keeps installation straightforward with included plug-and-play components
• Offers lens choices that suit stock, custom, and dark-trim builds
• Adds an animated startup sequence without compromising the clean factory-style fit
• Supports sequential signaling for a more modern lighting effect
• Fits the selected Sierra HD application instead of relying on universal marker lamps

 

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What's Included

• Four replacement LED sidemarker assemblies
• Two wiring harnesses
• Ten fender clips
• Four rubber plugs

Note: Confirm included components before installation.

 

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Installation Notes

• Confirm the selected model-year range and Sierra HD trim before installation.
• The lamps are designed as plug-and-play replacements for the factory fender lights.
• Sequential turn signal operation uses the included harness components.
• Do not modify wiring or mounting points unless required by the selected vehicle application.

Buyer is responsible for use in accordance with applicable vehicle, road, off-road, towing, racing, and local laws.

 

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Warranty Information

Warranty coverage typically protects against qualifying defects in materials or workmanship when the product is installed and used as intended.

Coverage typically excludes improper installation, misuse, modifications, electrical issues, overloading, tampering, impact damage outside warranty terms, or non-compliant use. Proof of purchase may be required for warranty claims.