LED Sidemarkers for 2020-2021 GMC Sierra HD 2500/3500 (set)

Features

  • Plug-and-play replacement for 2020+ GMC Sierra HD 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. 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.

GMC Sierra Sidemarker Functions

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.

GMC Sierra Sidemarker Functions

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.

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.

Experience. After over a decade in business, Diode Dynamics is the most trusted name in automotive LED lighting. Unlike all other LED distributors, we assemble and engineer products in the United States, for high quality and fast time-to-market of the newest and brightest LED technologies. We pride ourselves in offering only quality LED products, that will exceed your expectations. Please contact us if you'd like to discuss your lighting project!

Options

All sidemarkers illuminate in bright amber color, but there are three colors of lenses. Choose the one that fits your style!

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.)

What's Included

In the Box:

Standard

Sequential

  • Four (4) replacement sidemarkers
  • Two (2) wiring harnesses
  • Ten (10) fender clips
  • Four (4) rubber plugs
Quantity: Full Set (Four total)
Warranty: 3 year warranty
Return Policy: 30-day Return with no restocking fee
100% Satisfaction Guarantee

Fitment

Application: Sidemarker
Make: GMC
Model: Sierra HD 2500/3500
Years: 2020, 2021
Electrical Compatibility: No electrical issues (tested and confirmed)


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Specifications

Measured Lumens: 30 lm
Power (watts): 1.3
Operating Voltage: 9-16V
Current (amps @ 12.8V): 0.95
Operating Temperature: -40C to 85C (-40F to 185F)
LED Emitter: Mini SMD
Connector(s): OEM-Size Plug and Play
Driver Features: Internal, Constant Current
Materials: ABS Base, PMMA Lens
Compliance Ratings: SAE J575 Durability Test

Fitment

Application: Sidemarker
Make: GMC
Model: Sierra HD 2500/3500
Years: 2020, 2021
Electrical Compatibility: No electrical issues (tested and confirmed)

What's Included

In the Box:

Standard

Sequential

  • Four (4) replacement sidemarkers
  • Two (2) wiring harnesses
  • Ten (10) fender clips
  • Four (4) rubber plugs
Quantity: Full Set (Four total)
Warranty: 3 year warranty
Return Policy: 30-day Return with no restocking fee
100% Satisfaction Guarantee

Installation

During installation, you must remove the factory fender liner, which is held in place using plastic clips. We found that some of these might break when removed, so we've included ten (10) extra clips, just in case! If you need more than 10 replacement clips, they are available to purchase here.

Installation Time: 20-30 minutes

Tools Needed: Basic Toolset

Modification: None

Installation Guide: Click to download

Warranty

3 Year Replacement Limited Warranty

All Diode Dynamics products come with a 3 Year Worry-Free Warranty.

If you experience any defect with a product, we will do some quick troubleshooting, and if necessary, provide a replacement. There is no need to wait for a return and repair process. Click here to learn more.

Shipping

Domestic (U.S.) Shipping

All domestic (U.S.) orders ship with your choice of UPS or USPS, and all orders placed before 12 PM CST will ship the same day, if all items are in stock. Shipping costs are calculated at checkout, based on order size. Delivery usually takes just 3-5 days.

You will receive updates from our site when your order is shipped, along with a unique shipment number to ensure that your order is correctly accounted for. This allows you to easily reply to us if you have any concerns. 

Have a question about your shipment? Just like any other question you might have, simply send us an email and our trained lighting and shipping experts will reply, usually the same day. Or, give us a call during normal business hours.

 

International Shipping

We ship to almost everywhere in the world using USPS shipping services, along with your country's postal service. Rates are calculated at checkout to ensure fair pricing. We normally offer standard mail, Priority International, and EMS Express. Please note that the shipping time can vary widely, based on your countries mail service and border policies.

Shipments are marked with the value of your purchase price. International customers are responsible for any tariffs or customs fees that may be associated with their shipment. Please check your country's laws and regulations before your purchase.

Puerto Rico: As we use standard USPS, PR is considered a US territory for mailing purposes, and can be selected as such at checkout. Shipping will be domestic U.S. rates.

Canada: We ship to Canada every day! Most small orders will cost around $10 via standard mail. We also offer Priority and Express EMS. To see exact shipping rates, please view your options at checkout. We also offer UPS service to Canada.

Europe, Asia, and AustraliaWe ship to all other countries using standard mail. You can check the shipping cost at checkout, as it will be calculated based on your cart. We offer standard mail, Priority, and EMS Express.

 

Customs Fees for International Shipping

Shipments are marked with the value of your purchase price. International customers are responsible for any tariffs or customs fees that may be associated with their shipment. Please check your country's laws and regulations before your purchase.

As we use only standard mail, our customers normally do not incur any type of import fees, customs fees, or tariffs for smaller shipments. However, this cannot be guaranteed, and any fees are the responsibility of the buyer. Please contact us if you have any concerns.

The following part numbers are included with this listing:

SKU Price Name Weight Driver Components
DD5125 $220 LED Sidemarkers for 2020-2021 GMC Sierra, Clear (set) 2.39 lbs DD5153 LED Sidemarker for 2020+ GMC Sierra, Clear (single)
DD5126 $220 LED Sidemarkers for 2020-2021 GMC Sierra, Amber (set) 2.39 lbs DD5154 LED Sidemarker for 2020+ GMC Sierra, Amber (single)
DD5127 $220 LED Sidemarkers for 2020-2021 GMC Sierra, Smoked (set) 2.39 lbs DD5155 LED Sidemarker for 2020+ GMC Sierra, Smoked (single)
DD5150 $300 LED Sequential Sidemarkers for 2020-2021 GMC Sierra, Clear (set) 4.26 lbs DD5156 LED Sequential Sidemarker for 2020+ GMC Sierra, Clear (single)
DD5152 $300 LED Sequential Sidemarkers for 2020-2021 GMC Sierra, Smoked (set) 4.26 lbs DD5158 LED Sequential Sidemarker for 2020+ GMC Sierra, Smoked (single)
DD5151 $300 LED Sequential Sidemarkers for 2020-2021 GMC Sierra, Amber (set) 4.26 lbs DD5157 LED Sequential Sidemarker for 2020+ GMC Sierra, Amber (single)

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