FORM LIGHTING · FL0012
A modern Sierra signature. Full LED function.
Triple-projector headlights give the Sierra a distinctive C-shaped white DRL, sequential amber indicators and a two-stage startup sequence. This pair replaces both original headlight assemblies on the exact listed trucks.
- Left + rightComplete headlight pair
- Three projectorsTop two provide low + high
- White DRLAmber sequential turn signal
THREE PROJECTORS. ONE DISTINCTIVE LOOK.
Designed around the Sierra front end
Useful low and high beams
Three projectors sit in each assembly. The top two are bi-LED units that provide both low- and high-beam illumination.
C-shaped running lights
The bright white running-light signature frames the lamps. An included fuse-box DRL harness supports the feature on the specified original-equipment configurations.
Two different animations
The running lights use a two-stage startup sequence. Amber LEDs sweep sequentially when the turn signal is activated.
Built as complete assemblies
UV-coated polycarbonate lenses, automotive-grade LED emitters, breather vents and original-style connectors form a complete housing upgrade. Integrated screw adjusters let you set the beam aim after installation.
The design changes the lighting hardware and appearance together. It is not a replacement-bulb kit.
BEFORE AND AFTER
See the change on a Sierra
View the manufacturer’s beam illustration
THE EQUIPMENT CHECK MATTERS
Choose by model and original turn signals
- GMC Sierra 1500: 2014–2018
- GMC Sierra 2500HD / 3500HD: 2015–2019
- Not compatible with factory LED turn signals.
| Truck | Manufacturer-listed years | Important check |
|---|---|---|
| Sierra 1500 | 2014–2018 | No factory LED turn signals |
| Sierra 2500HD / 3500HD | 2015–2019 | No factory LED turn signals |
Do not carry the 1500 year range over to HD trucks. Confirm your original lamps and connectors before ordering.
BOTH SIDES + THE LISTED WIRING
What is in the box?
- Two FORM Lighting projector headlight assemblies
- One FL2011 DRL harness
- Two FL2012 plug-and-play adapters
The adapter and DRL harness requirements depend on your original equipment; follow the manufacturer’s routing instructions.
BOLT IN, CONNECT, VERIFY
Installation and aiming
- Confirm the model, year and original turn-signal equipment.
- Install the pair at the factory mounting points and connect the supplied adapters as directed.
- Route and secure the DRL harness to the specified fuse-box connection if required.
- Test low beam, high beam, DRL, startup sequence and indicators; then adjust the beam aim.
DETAILS BEHIND THE DESIGN
Lenses, connectors and aiming
PRODUCT DETAILS
Specifications and support
| Detail | FL0012 |
|---|---|
| Quantity | One left + one right assembly |
| Operating voltage | 9–16 V |
| Operating temperature | −40°C to 85°C |
| Ingress rating | IP67 |
| Connectors | Original-size plug-and-play connectors |
| DRL / turn signal | White / amber sequential |
| Lens | UV-coated polycarbonate |
FORM Lighting provides a 2-year limited manufacturer warranty. Coverage, exclusions and return authorization follow the manufacturer’s current policy. Keep your proof of purchase and contact BTS before removing a lamp for a suspected warranty issue.
SEE THE DESIGN
Watch the official overview
FORM Lighting’s overview of its 2014–2018 Sierra LED projector headlights. Refer to the separate HD year range and factory-equipment notes above.
The video loads only when you choose it. No autoplay. Product-family demonstrations may include other options; the exact package and compatibility notes on this page govern your selection.
BEFORE YOU ORDER
Sierra headlight questions
Will these fit a Sierra with factory LED turn signals?
No. The manufacturer specifically excludes that original-equipment configuration.
Does the same year range cover the 1500 and HD?
No. The listed range is 2014–2018 for Sierra 1500 and 2015–2019 for Sierra 2500HD/3500HD.
Are all three projectors bi-LED?
The manufacturer says the top two projectors are bi-LED, providing both low- and high-beam functions. There are three projectors in each assembly.
Can I add the white DRL if my original lights do not have one?
The listed package includes a DRL harness for the manufacturer’s specified installation. Follow its fuse-box and routing instructions.
Does the order include both sides?
Yes. The package supplies left and right headlights, one DRL harness and two halogen adapters.
Do they still need to be aimed?
Yes. Fitment and plug-in connectors do not replace the need to check operation and set the correct beam aim.
