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馃挜NEW!馃挜 LED Sidemarkers for 2020+ GMC Sierra HD | Diode Dynamics

1050 Views 6 Replies 1 Participant Last post by  Diode Dynamics

Diode Dynamics is excited to introduce our new LED Sidemarker Fender Lights for 2020+ GMC Sierra HD 2500/3500!

Upgraded Styling. If you're looking to give your GMC Sierra 2500/3500 an upgrade in styling and appearance, this is the perfect way to do it! These LED sidemarkers are a plug-and-play replacement for the factory fender lights, illuminating the entire width of the housing for a distinctive look and brighter appearance.

Choose from three lens color options to get the look you're after.

Amber: Also called OEM, these match your original fender lights, and are DOT/SAE compliant in both illumination and lens color.

Smoked: A dark, blacked-out appearance that blends nicely with the factory fender. (May not meet compliance requirements in your region.)

Clear: These are clear in color, but still have the retroreflector optics. (May not meet compliance requirements in your region.)

Unique Startup. Both the standard and sequential models feature a unique startup sequence. Every time the sidemarkers turn on, they illuminate in an intense amber color starting from the center then spreading to either side. Once they are completely illuminated, they gradually return to a running light mode.

Sequencing Turn Signal. Our sequential option provides an upgrade in functionality. Anytime you hit your turn signal, the sidemarkers illuminate in a sequencing amber pattern to indicate signaling! The sequential option uses the included plug-and-play harness to power the fender lights using the headlight connector.

OEM Grade. Unlike other sidemarkers on the market, these sidemarkers were designed for OEM standards of quality, using automotive-grade plastic materials, UV-stable lenses, and quality connectors. The dual-lens design uses an inner diffusing lens combined with an outer lens, for an even, uniform glow. The units themselves are designed directly from original CAD data for a perfect fit, and use OEM-grade connectors that plug right into the factory socket.

Each kit will include:

  • Four (4) replacement sidemarkers
  • Ten (10) fender clips

  • Four (4) replacement sidemarkers
  • Two (2) wiring harnesses
  • Ten (10) fender clips
  • Four (4) rubber plugs

Reliability. These LEDs are designed with newer constant-current circuitry and transient voltage protection. These features, found in factory-installed lighting components, protect the circuit over time, ensuring years of flicker-free performance. They also include a breather vent, to prevent pressure buildup and maintain a strong weathertight seal for years to come.

Diode Dynamics LED Sidemarkers for the 2020+ GMC Sierra HD are proudly assembled in the U.S.A, and are backed by a 3-year warranty.

If you have any questions, please don't hesitate to post, PM, or email [email protected].

PM us for the free-shipping code (U.S. forum members only)

Thanks for looking,
John C.
Diode Dynamics
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TWO YEARS of non-stop stress testing!

This includes vibrations tests, extreme temperatures (hot and cold), pressured water, corrosion testing, and more.

Our LED Sidemarkers were designed and built to stand the test of time. And they're backed with a 3-year warranty!

Just a reminder, all forum members are eligible for a free US shipping code. Just send us a direct message for the code.

John C.
Diode Dynamics
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We've released our installation video on YouTube for our 2020+ GMC Sierra HD 2500/3500 LED side markers!

If you have any questions, we'll be glad to help!

Now's the time to upgrade your ride! Our Black Friday Sale is going on NOW! Save 15% sitewide, including our LED Sidemarkers, by entering coupon code "BF21" at checkout! And, all orders over $500 will receive a free Diode Dynamics long sleeve shirt! Sale ends Tuesday, 11/30/2021.

John C.
Diode Dynamics

Sale ends 11:59 p.m. CST on Tuesday 11/30/2021.
Cannot be combined with other coupon codes.
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Don't miss your chance to save 15% off your entire order of lighting upgrades, including our all LED Sidemarkers, with coupon code "BF21" at checkout! Plus, get a free Diode Stage Series long sleeve shirt when you spend $500! HURRY, this sale ends TONIGHT!

John C.
Diode Dynamics

Sale ends 11:59 p.m. CST | Tuesday, 11/30/2021.
Cannot be combined with other coupon codes.​
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is your chance to SAVE up to 15% sitewide on your favorite Diode Dynamics LED lighting products.
Up to 15% OFF LED Lighting Upgrades
鉃 15% OFF Stage Series Rock Lights & HitchMount LED Pods
10% OFF Elite Series JL/JT Headlights
鉃 Free US Shipping on any order over $300!


Did you know?
You can find all of the products we offer for your vehicle using our vehicle finder tool! Simply enter the year, make, and model.


Discounts cannot be combined with other offers or any previous orders. Excludes items with pre-order status.
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馃毃 Our Memorial Day Sale is LIVE!!! 馃毃​

鉃 Up to 15% OFF Sitewide
10% OFF JL/JT Elite Series Headlights
鉃 Free US Shipping on any orders over $300!

Excluded: F150 Elite Series Headlights, and F150 Elite Series Fog Lights

John C.
Diode Dynamics

Hours: Monday-Friday 10 a.m. - 5 p.m.
Email: [email protected]
Phone: 314-205-3033

Sale ends 11:59 p.m. CST on Friday, 6/2/2023. Cannot be combined with other coupon codes.
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