All Lights On Module – GM Trucks/SUVs (2003–2007 Classic)

Description

Get maximum forward lighting when you need it. This plug‑in All Lights On module installs in the under‑hood fuse/relay center and commands the low beams and fog lights to stay on whenever the high beams are engaged—often referred to as the 4‑Hi/6‑Hi mod. There’s no cutting or splicing; the board simply bridges the factory circuits, and the mod is fully reversible (remove it to return to stock).

Key features

• Keeps low beams + fogs on with high beams

• Fuse‑box plug‑in installation; no wiring harnesses to run

• Works with most halogen or LED replacement bulbs drawing stock‑like current

• Designed for 2003–2007 Classic GM full‑size pickups and 2003–2006 full‑size SUVs

Fitment (GM Classic platforms)

• Chevrolet: Silverado 1500/2500/3500 (2003–2007 Classic), Avalanche (2003–2006), Suburban (2003–2006), Tahoe (2003–2006)

• GMC: Sierra 1500/2500/3500 (2003–2007 Classic)

Notes: Not for 2007‑up new body style (GMT900). Some regions restrict the use of fog lamps with high beams—verify local laws. Avoid high‑wattage bulbs that exceed factory fuse ratings.

What’s included

• 1 × All Lights On fuse‑box module