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Ships within 48 hours · Estimated delivery Aug 23 - Aug 28
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Description
Diode Dynamics 20-21 Sierra 2500/3500 HD LED Sequential Sidemarkers Clear SetFeatures Plug and play compatible with GMC Sierra HD 2020+ fender lights Dynamic startup sequence with animated effect Fully illuminated housing, with dual lens design for an even glow Optional Sequential turn signal feature, with plug and play wiring harness OEM grade construction and perfect fitment Engineered and assembled in USA Overview Upgraded Styling. These LED sidemarkers are a plug and play replacement for the factory fender lights,
Features Plug-and-play compatible with GMC Sierra HD 2020+ fender lights Dynamic startup sequence with animated effect Fully-illuminated housing, with dual-lens design for an even glow Optional Sequential turn signal feature, with plug-and-play wiring harness OEM-grade construction and perfect fitment Engineered and assembled in USA Overview Upgraded Styling. 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. 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. Options Amber: These match your original sidemarkers, and are DOT/SAE compliant. Smoked: A dark appearance, great on black and grey vehicles. Clear: These are clear in color, but still have the retroreflector optics.This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2023 | GMC | Sierra 2500 HD | AT4 |
| 2020-2021 | GMC | Sierra 2500 HD | Base |
| 2020-2023 | GMC | Sierra 2500 HD | Denali |
| 2022-2023 | GMC | Sierra 2500 HD | Pro |
| 2020-2023 | GMC | Sierra 2500 HD | SLE |
| 2020-2023 | GMC | Sierra 2500 HD | SLT |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 5
EUFY 11S
Size: 2+8 pack
Used to replace the ones for my EUFY 11S vacuum. They fit just like the ones and got my vacuum back to cleaning really good. Didn’t realize how loud my vacuum had become until I replaced these parts.
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Reviewed in the United States on December 19, 2025
★★★★★ 5
Get this!
Size: 3+12+12+2+1 pack
Very nice pack of essentials for my robot.
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Reviewed in the United States on March 17, 2026
★★★★★ 5
Noice Lights from Govee!
Item Package Quantity: 2
Worth the investment especially if you have space for them and you have a big TV. I rock with a 75" in my living room. The box has a manual control module with buttons you can press, but this works with Alexa or Google Home via voice command. The Govee app unlocks way more settings and tuning, including what you see here. Super easy to set up the bars and link up everything. Easily worth the money. Brightness can be adjusted, lights are great, and color options (patterns, reactive, rotating, etc.) are fun. Cheers!
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Reviewed in the United States on November 29, 2025
★★★★★ 5
Good product
This light bar performs very well. I have purchased 3 of them
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Reviewed in the United States on March 28, 2026
★★★★★ 5
Best option for Sim Racing Ambient Lighting
Item Package Quantity: 2
I picked up these Light Bars from Govee specifically for my sim racing setup to be used for ambient lighting, and they’ve exceeded expectations.
The RGBIC technology is the standout feature. Being able to display multiple colors on each bar at the same time makes the lighting effects far more dynamic than standard RGB strips. During races, the lighting reacts smoothly to telemetry data—RPM, flags, rev limiter, and speed shifts all translate into immersive ambient effects that genuinely add to the experience.
Setup was straightforward, but the real highlight was the seamless SimHub integration. Configuration was quick, and the light bars responded immediately once connected. No complicated workarounds, no lag—just clean, real-time feedback. If you're already using SimHub for dashboards or bass shakers, these integrate perfectly into that ecosystem.
Brightness is more than enough for ambient lighting without being distracting, and the diffusion along the 31-inch bars keeps everything looking clean and professional—no visible LED hotspots. The WiFi connectivity has been stable, and the app gives you plenty of customization options outside of racing as well.
For anyone building a sim rig and wanting that extra layer of immersion, these are absolutely worth it.
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Reviewed in the United States on March 3, 2026