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Description
Diode Dynamics 20-21 Sierra 2500/3500 HD LED Sequential Sidemarkers - Amber 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
4.6 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
8 months later, my dog's favorite toy by far!
Color: Ring, Color: Ring
My dog has a LOT of toys, and this is her favorite. We've had it for 8 months and it still holds up. She likes to pull at the stitching (and has removed a bunch), but the toy still holds together surprisingly well. It's a great value for the money.
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Reviewed in the United States on January 22, 2026
★★★★★ 5
Very rugged
Color: Ring
Stands up to my Akita knawing on it so it's a win-win. We are both happy 😁
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Reviewed in the United States on December 24, 2024
★★★★★ 1
Not good for aggressive chewers
Color: Ring, Color: Ring
My aggressive chewer had pieces of leather and felt chewed off within 10 minutes. Had to take it away from him because I didn’t want him swallowing them.
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Reviewed in the United States on July 19, 2025
★★★★★ 2
It's a do-not for me
Color: Ring
Bought for my doodle and the toy lasted less then two days. Not very durable. Inside the toy were layers of what looked like felt. Took it away from dog
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Reviewed in the United States on June 22, 2025
★★★★★ 5
Tough toys for tough girls
Color: Ring
I have 3 large dogs that are proficient at destruction and extremely aggressive chewers. Few toys survive them. I bought several of these toys and they have been put through the ringer but still in great shape. Definitely worth it in my book. I wish there were more cute options but cute doesnt typically last for these 3.
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Reviewed in the United States on November 18, 2025