Duramax 2003-2007 All Lights On Module Fleece FPE-GM-ALO-37 GM

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Fleece Performance All Lights On Module | 2003-2007 GM Duramax LB7/LLY/LBZ (FPE-GM-ALO-37)

Maximize Nighttime Visibility on Your 2003-2007 Duramax

The Fleece Performance GM All Lights On Module (FPE-GM-ALO-37) is the simple, effective upgrade your 2003-2007 Duramax has been missing. This compact plug-and-play circuit board installs directly into the under-hood relay box and allows your high beams, low beams, and fog lights (if equipped) to illuminate at the same time when you turn on your high beams.

No more settling for limited lighting when you need it most. Whether you’re towing, driving dark backroads, off-roading, or navigating poor weather, this module gives you a wider, brighter forward light pattern for significantly improved visibility and safety.

When high beams are off, your low beams and fog lights function exactly as they did from the factory.

Why Duramax Owners Choose This Module

Dramatically improves visibility on dark roads, during towing, and in adverse conditions
Simple 5–10 minute install — no cutting, splicing, or permanent modifications
Fully reversible — remove it anytime and your truck returns to stock operation
Includes a spade terminal for a low-amperage signal ground (lets you trigger an accessory relay when high beams are on)

Key Features

Simultaneous high beam + low beam + fog light operation
Retains normal low beam and fog light function when high beams are off
Plug-and-play design — no wiring changes required
Designed for LB7, LLY, and LBZ Duramax engines

Fitment

2003–2007 Chevrolet Silverado 2500HD / 3500HD (Classic body style)
2003–2007 GMC Sierra 2500HD / 3500HD (Classic body style)
Engines: LB7 (2003–2004), LLY (2004.5–2005), LBZ (2006–2007)
Also fits many 2003–2006 GM full-size SUVs (Avalanche, Suburban, Tahoe) when the under-hood relay box layout matches

Installation

Open the under-hood fuse/relay box
Remove the four relays labeled: FOG LP, HDLP-LOW, DRL, HDLP-HI
Position the All Lights On Module circuit board in the designated location
Reinstall the relays
(Optional) Connect the included spade terminal for accessory relay control

Important Notes

The spade terminal provides a signal ground only (low amperage) for controlling a relay. It is not rated for high-current loads.
Verify your fuse box layout matches the diagram for proper fitment.
This is for Classic body style trucks only (not 2007.5+ new body style).

What’s Included

Fleece Performance All Lights On Module circuit board
Spade terminal for signal ground

Give your Duramax the lighting it deserves. Safer nights start with better light — add the Fleece All Lights On Module to your cart today.

Fleece Performance All Lights On Module | 2003-2007 GM Duramax LB7/LLY/LBZ (FPE-GM-ALO-37)
Maximize Nighttime Visibility on Your 2003-2007 Duramax
The Fleece Performance GM All Lights On Module (FPE-GM-ALO-37) is the simple, effective upgrade your 2003-2007 Duramax has been missing. This compact plug-and-play circuit board installs directly into the under-hood relay box and allows your high beams, low beams, and fog lights (if equipped) to illuminate at the same time when you turn on your high beams.
No more settling for limited lighting when you need it most. Whether you’re towing, driving dark backroads, off-roading, or navigating poor weather, this module gives you a wider, brighter forward light pattern for significantly improved visibility and safety.
When high beams are off, your low beams and fog lights function exactly as they did from the factory.
Why Duramax Owners Choose This Module

Dramatically improves visibility on dark roads, during towing, and in adverse conditions

Simple 5–10 minute install — no cutting, splicing, or permanent modifications

Fully reversible — remove it anytime and your truck returns to stock operation<[...]