2003-2007 Chevrolet Silverado & Avalanche LED Headlights Installation

Fits:

2003-2006 Chevrolet Silverado 1500, 2500 and 3500, including HD models
2007 Chevrolet Silverado 1500, 2500 and 3500 Classic, including HD
2003-2006 Chevrolet Avalanche 1500 and 2500

Two fitment traps to check first:

A 2007 truck must be a Silverado Classic. The 2007 non-Classic is a different generation and takes a different lamp — the year alone will not tell you.
Avalanche owners: confirm your truck does not have factory body cladding. Clad models are not covered.

This Is a Four-Piece Set

Two headlight assemblies and two bumper park / turn lamps. The truck carries a headlight and a separate bumper lamp on each side, and all four are in the box.

Lay all four pieces out and identify left from right before anything comes off the truck.

PrismBeam LED triple projector headlights on a 2003-2006 Chevrolet Silverado

What It Does

Three projectors per side: two bi-function projectors for low and high beam, plus one dedicated high-beam projector
White daytime running light
Amber sequential turn signal
Startup animation when the ignition is switched on
An amber reflector at the outer corner of each headlight

The kit plugs into the factory connectors — no adapter harness is required.

Before You Start

Check that all four pieces are present and undamaged before removing anything from the truck.
Park on level ground, switch off, and disconnect the negative battery terminal while handling wiring.
Work one side at a time. Leaving the opposite side assembled gives you a live reference for connector routing and lamp seating.
Use masking tape around painted edges near the hood, grille and bumper edge.
Do not put dielectric or weather-sealing grease on connectors or sockets.
If a lamp or trim panel does not move, stop and look for another fastener or locating pin.

Required Tools

Trim removal tool or panel clip tool
Metric socket and ratchet set
Phillips and flat screwdrivers
Masking tape and clean microfiber towels
Electrical tape and zip ties for tidying harness routing
A flat wall for beam aiming

Part 1: Remove the Factory Lamps (One Side)

Step 1: Find Every Retainer First

Locate every retainer for the headlight on the side you are working on before releasing any of them, and note how each one is oriented so it goes back the same way.

Step 2: Release the Headlight

With the retainers clear, draw the headlight straight forward off its locating pins. Do not twist it or lever it against the fender — if it will not come, a retainer is still engaged.

Step 3: Disconnect

Support the assembly, release each locking tab, and separate the connectors. Pull on the connector body, never on the wires.

Step 4: Remove the Bumper Park / Turn Lamp

Same sequence for the lamp below the headlight. Keep the fasteners for each lamp separated — headlight and bumper lamp hardware is not interchangeable.

Part 2: Install the New Lamps (Same Side)

Step 5: Connect

Plug the new lamp into the factory connectors for that side. No adapter harness is required. Confirm every plug is fully seated and locked.

Step 6: Test While Everything Is Still Loose

Switch on and confirm low beam, high beam, the white daytime running light, the amber sequential turn signal and the startup animation. It is far easier to fix a connector now than after the assembly is bolted in.

Step 7: Seat and Secure the Headlight

Guide the assembly onto its locating pins, check the gap against the fender and hood, then refit the retainers. The lamp should sit flush without being forced.

Step 8: Fit the Bumper Lamp

Same way, then refit any trim you removed.

Step 9: Repeat, Then Reconnect the Battery

Only now do the other side, using the side you just finished as your reference.

Part 3: Final Checks

Low beam and high beam on both sides, including the dedicated high-beam projector.
White daytime running light, position lamps, amber sequential turn signal and hazard flash — on all four lamps.
Startup animation when the ignition is switched on.
Check for dashboard warnings, flicker or hyperflash.
Set the beam aim: park square to a flat wall about 25 feet away on level ground, mark the height of each beam centre, and bring the cut-off line level and even. A projector aimed too high is worse for oncoming traffic than the lamp it replaced.

Common Issues and Solutions

The headlight works but the bumper lamp does not. These are separate assemblies on separate connectors. Confirm the bumper lamp has its own plug fully seated — do not assume one connector feeds both.

One lamp does not turn on. Recheck the main connector lock, the related fuse and the battery connection.

Warning, flicker or hyperflash. Confirm both sides are wired the same way, then contact support before adding any universal load resistor or decoder.

The lamp will not sit flush. A locating pin is most likely not engaged. Back the assembly out and reseat it rather than tightening the retainers down onto it.

Beam pattern is too high or uneven. Recheck lamp seating first, then adjust the aim on a flat surface.

Condensation inside the headlight. Temperature differences can cause light condensation, which is normal. Once the light has been on for a while and the internal temperature stabilizes, the moisture clears on its own. It does not affect brightness, performance, or lifespan.