LED Sidemarkers For 2020-2023 GMC Sierra HD 2500/3500 (Set)

Diode Dynamics LED fender sidemarkers for the 2020–2023 GMC Sierra 2500 HD and 3500 HD. Each set replaces four factory lamps. Choose Standard or Sequential function and Clear, Amber or Smoked lenses.

Function

• Standard: Amber startup animation followed by steady running lights.
• Sequential: The same startup and running lights, plus sequential amber turn signals using the included wiring harnesses.

All three lens colors illuminate amber. The manufacturer lists the Amber lens as DOT/SAE compliant; Clear and Smoked may not meet local requirements.

Included

• Standard: Four sidemarkers and ten fender clips.
• Sequential: Four sidemarkers, two wiring harnesses, ten fender clips and four rubber plugs.

Sequential fitment restriction: Not compatible with 2023 Denali Ultimate or 2023 AT4 HD trims. Sequential compatibility for earlier AT4 HD models requires confirmation before ordering.

Backed by Diode Dynamics’ three-year limited warranty.

Availability: Available options are supplied to order. Shipping timing is confirmed for the selected option.

Clear Sequential (DD5150): Currently unavailable for checkout. On November 10, 2026, the supplier reported an estimated 12-week backorder.