Form Lighting GMC Sierra 2500/3500 HD (15-19) Sequential LED Projector Headlights
Warranty Information
Vendor warranty summary
Form Lighting Warranty
At a glance: 2-year limited warranty on every Form Lighting product against manufacturing defects and functional failure, plus free lifetime tech support
This is Form Lighting's policy, not an NVMOS policy. We've summarized Form Lighting's published warranty in plain English. The manufacturer's official terms always govern and can change without notice. Last reviewed on nvmos.com: October 15, 2026.
Coverage by product
| Product or component | Coverage |
|---|---|
| All Form Lighting headlights, tail lights, fog lights and accessories: manufacturing defects or functional failure | 2 years from purchase |
| Product support and troubleshooting, including after the warranty runs out | Free, for life |
| Moisture beyond normal condensation (running droplets or puddling) | Covered at Form's determination |
| Consumable parts such as incandescent bulbs | Not covered |
What's covered
- Manufacturing defects and functional failures for 2 years: Form replaces the product, or a comparable one if it has been discontinued
- Single-component problems: Form may replace just the part needed to restore function
- Coating damage that shows up within the warranty and traces to a manufacturing defect
- Form pays to ship the replacement to US customers, and usually doesn't need the old part back
What's not covered
- Normal condensation on the lens, which clears as the lamp warms up
- Surface finishes worn out by normal use
- Installation labor or time spent swapping a warranty part
- Improper installation or use, abuse beyond normal wear, or any opening, rewiring or modification of the lamp
- Purchases from unauthorized sellers. The warranty is non-transferable
How to make a Form Lighting claim
- Contact Form Lighting before you take the lamp to a shop; they'll diagnose the problem with you first
- If Form confirms a defect, they issue an RMA number. Nothing goes back without one
- For moisture claims, include photos that show how much water is inside the lamp
- If Form does ask for a return, you pay the return shipping
Form Lighting contact: Phone: (636) 748-4444 · Email: contact@formlights.com · Monday to Friday, 10 AM to 5 PM Central · St. Charles, Missouri
Bought it from NVMOS? Start with us.
Have your order number and a few photos of the issue ready, then call real humans at (920) 249-7744 or send us a message. We'll tell you whether the claim goes through us or straight to Form Lighting, and help it along either way.
Shop Form Lighting at NVMOS
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Disclaimer: The information on this page describes Form Lighting's own warranty policy. It is not a warranty offered by NVMOS (No Visible Means of Support LLC). Manufacturers update their terms at any time; we review these pages periodically, but the manufacturer's current official policy is the one that applies to your claim. Source: Form Lighting warranty information. Last updated on nvmos.com: October 15, 2026. See our return policy for NVMOS's own terms.
About the brand
Form Lighting makes full-LED replacement headlights, tail lights and fog lights for popular trucks and SUVs, with modern touches like sequential turn signals, startup animations and multi-projector optics. NVMOS carries Form for the Toyota Tundra, Tacoma, 4Runner and Sequoia, Ford Bronco and Maverick, Jeep Wrangler JL and Gladiator, Ram, GMC Sierra and Chevy Silverado: plug-and-play, street legal, and priced below most premium housings.
Based in: St. Charles, Missouri · Founded: 2022 · Family: Shares HQ and warranty program with Diode Dynamics · Assembled: IATF 16949-certified facility · Lead time: In-stock lamps usually leave Form the same business day; ask us about any item
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Warranty terms are set by Form Lighting, not NVMOS, and can change. Bought from us? Call (920) 249-7744 and we'll handle the claim with the brand.
Form Lighting Sequential LED Projector Headlights — GMC Sierra 2500/3500 HD (2015–2019)
GM put some LED into the 2015–2019 Sierra 2500/3500 headlights but never went full LED. This pair does: three projectors per side, with the top two running bi-LED low and high beam, a bright white C-shaped running light, and an LED turn signal that sequences in amber.
They bolt to the factory mounting points and plug into the factory connectors, with two halogen adapters and a DRL harness in the box. Assembled in an IATF 16949-certified facility. Not compatible with trucks that have factory LED turn signals.
| Spec | Detail |
|---|---|
| Optics | Triple projectors; top two are bi-LED (low and high beam) |
| Functions | Low beam, high beam, DRL, sequential turn signal, startup sequence |
| DRL | C-shaped bright white LED; included fuse-box harness (FL2011) adds it to trucks without a factory DRL |
| Turn signal | LED, amber sequential chase |
| Install | Plug-and-play, bolts to factory mounts; 1–2 hours, basic tools, no modification |
| Compliance | SAE, DOT, FMVSS and CMVSS when installed and aimed properly; screw-type aim adjusters |
| Assembly | IATF 16949-certified facility; UV-coated polycarbonate lenses; IP67; 9–16 V |
| Warranty | 2 years, US-based support |
| Fitment | GMC Sierra 2500/3500 HD 2015–2019. Not compatible with factory LED turn signals. |
| Part number | FL0012 (pair); includes FL2011 DRL harness and FL2012 halogen adapters |
Will these fit my Sierra?
They fit the 2015–2019 GMC Sierra 2500 and 3500 HD. They are not compatible with trucks that came with LED turn signals from the factory. The 2014–2018 Sierra 1500 has its own listing.
Projector or reflector version?
Both are full LED with the C-shaped DRL, startup chase and sequential turn. This projector version uses three projectors per side for a sharper cutoff; the reflector version uses LED reflector optics. If you want amber instead of white, there is an amber DRL projector version.
What comes in the box?
Left and right headlamps, a DRL harness that plugs into the fuse box, and two halogen headlamp adapters. Form quotes one to two hours with basic tools and no modification.
Are they street legal?
Form states they meet SAE, DOT, FMVSS and CMVSS standards for road use in the US and Canada, provided they are installed and aimed with the built-in screw adjusters.
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Specifications
Form Lighting GMC Sierra 2500/3500 HD (15-19) Sequential LED Projector Headlights FAQs
Will these fit my Sierra?
They fit the 2015–2019 GMC Sierra 2500 and 3500 HD. They are not compatible with trucks that came with LED turn signals from the factory. The 2014–2018 Sierra 1500 has its own listing.
Projector or reflector version?
Both are full LED with the C-shaped DRL, startup chase and sequential turn. This projector version uses three projectors per side for a sharper cutoff; the reflector version uses LED reflector optics. If you want amber instead of white, there is an amber DRL projector version.
What comes in the box?
Left and right headlamps, a DRL harness that plugs into the fuse box, and two halogen headlamp adapters. Form quotes one to two hours with basic tools and no modification.
Are they street legal?
Form states they meet SAE, DOT, FMVSS and CMVSS standards for road use in the US and Canada, provided they are installed and aimed with the built-in screw adjusters.
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