LACHTEM Auto Fog & All-Lights Mod Harness for 2022–2026 Chevy Silverado / Sierra — Plug-and-Play, No Cutting

LACHTEM Auto Fog & All Lights Mod Harness adds automatic fog-light control and an all-lights-on function to compatible 2022–2026 Chevy Silverado and GMC Sierra trucks without cutting or coding.

Designed for refreshed Silverado and Sierra models, this plug-and-play harness restores fog lamp behavior and enables fogs, low beams and high beams to operate together when high beams are active. Built with a corrugated, flame-resistant shell and OEM-style connectors, the harness installs behind the driver-side kick panel and interfaces directly with the factory headlight module and BCM.

How does this harness make fog lights automatic?

The harness intercepts the factory headlight wiring so fog lights can turn on when the headlight switch is left in Auto or when high beams are engaged. It respects intelligent beam logic so fogs follow your high-beam operation in standard modes, improving forward illumination without rewiring the truck.

• Activates fogs when headlight switch is in Auto.
• Allows fogs to remain on with manual or automatic high beams (outside smart-beam restrictions).
• No permanent changes to stock wiring or BCM programming required.

What vehicle models and years are compatible?

This harness is purpose-built for the refreshed model years of Chevy Silverado and GMC Sierra trucks, covering both 1500 and HD variants where specified. Check fitment before purchase to confirm compatibility with your exact model and year.

• Chevy Silverado 1500: 2022–2026 refreshed models.
• Chevy Silverado 2500/3500 HD: 2024–2027 refreshed models (selected years).
• GMC Sierra 1500: 2022–2026 refreshed models; Sierra 2500/3500 HD: 2024–2027 refreshed models.

How difficult is installation and what does "plug-and-play" mean here?

Installation is straightforward and reversible: remove the driver-side kick panel, unplug the factory headlight connector, insert the LACHTEM module between the connector and BCM socket, and reassemble. There’s no cutting, splicing, or ECU programming required, so the factory appearance and systems remain intact.

• Driver-side kick panel access; minimal hand tools needed.
• Factory connectors are reused; no soldering or wire taps.
• Comes as a single headlight all-on mod harness and basic instructions.

What protection and durability features does the harness offer?

The harness uses a corrugated outer shell for enhanced abrasion, heat and flame resistance, extending service life in underhood or wheel-well environments. Corrosion-resistant contacts and robust strain relief reduce failure points from vibration and exposure.

• Corrugated shell for abrasion and flame protection.
• Improved heat and corrosion resistance for long-term reliability.
• OEM-style connectors and secure junction points for stable operation.

Who is this for: The LACHTEM Auto Fog & All Lights Mod Harness suits owners of compatible Chevy Silverado and GMC Sierra refreshed trucks who want better nighttime illumination and factory-style operation without permanent wiring changes. It’s ideal for DIYers and professional installers who prefer a reversible solution that preserves OEM connectors and vehicle electronics while improving fog-light behavior and overall forward visibility.