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Diode Dynamics 20-21 Sierra 2500/3500 HD LED Sequential Sidemarkers Smoked Set

Original price $399.95 - Original price $399.95
Original price
$399.95
$399.95 - $399.95
Current price $399.95

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.

  • Modern LED replacement for your factory sidemarker lamp
  • Modern LED replacement for your factory sidemarker&nbsp
  • Plug-and-play installation no modification needed
  • OEM-grade retroreflector optics
  • Engineered and assembled in USA
  • OEM fit-and-finish
  • lamp

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

Processing & Shipping Overview

Processing occurs before shipping.

Most in-stock items typically process within 2–3 business days before shipment or pickup. Expedited shipping options affect transit time after an order ships and do not speed up processing.

Made-to-order, special-order, vendor drop-ship, and freight items require additional processing time before shipping. Any extended lead times will be noted on the product page when applicable.

For the most up-to-date order status or lead time questions, please contact sales@smgspeed.com or use live chat during business hours.



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