A-Premium Trailer Brake Control Switch 84108373 — Direct-Fit 8-Terminal Snap-Fit Replacement for Chevrolet & GMC

The A-Premium Trailer Brake Control Switch 84108373 is a direct-fit dashboard switch designed to restore trailer-brake control functions on compatible Chevrolet and GMC trucks and SUVs.

This replacement switch replicates the factory selector used to manage integrated trailer brake systems on a range of GM vehicles. Built with an 8-terminal configuration and a snap-fit mounting style, it connects to the vehicle’s existing harness for a straightforward swap. The unit matches original equipment reference numbers (TBM003, 84108373, 23145874) so technicians and DIYers can identify the correct part quickly.

Which vehicles will accept this brake control switch?

The switch is made for multiple Chevrolet and GMC models across mid-2010s to early-2020s model years. Check specific model-year fitment carefully to confirm compatibility before ordering.

• Chevrolet: Colorado (2016–2021), Silverado 1500 (2014–2019), Silverado 2500/2500 HD (2015–2019), Silverado 3500/3500 HD (2015–2019), Suburban (2016–2020), Tahoe (2016–2020)
• GMC: Canyon (2016–2021), Sierra 1500 and 1500 Limited (2014–2019), Sierra 2500 HD and 3500 HD (2015–2019), Yukon and Yukon XL (2016–2020)
• Reference numbers: TBM003 / 84108373 / 23145874 for parts lookup

How does the switch mount and connect to my vehicle?

Installation uses the original dashboard opening and snaps into place without requiring custom fabrication. The connector matches the factory female harness and the switch presents male pin terminals, so it mates directly to the vehicle wiring harness.

• Mounting: snap-fit into factory dashboard location
• Terminals: 8-pin arrangement with male pins and female connector compatibility
• Attachment: direct replacement—no cutting or splicing when matched to listed vehicles

What are the technical specifications and build details?

The component follows OEM-style electrical design with a compact dashboard profile and robust pin terminals. It’s made for repeated use in vehicle HVAC/control clusters where durability and electrical consistency matter.

• Terminal Quantity: 8
• Connector Gender: female on harness side; terminal gender male on switch side
• Terminal Type: pin-style terminals for reliable contact

What warranty and support does A-Premium provide?

A-Premium backs this replacement switch with a one-year, unlimited-mileage guarantee to cover defects in materials and workmanship. Customer service can assist with fitment questions and post-purchase support if the part doesn’t meet expectations.

• Warranty: 1 year, unlimited mileage
• Support: fitment guidance and after-sale assistance from A-Premium
• Coverage: defects in materials and workmanship—see seller terms for details

Who is this for: This A-Premium switch is intended for vehicle owners, fleet managers, and mechanics who need a fast, reliable replacement for a factory trailer brake control switch on supported Chevrolet and GMC models. It’s a practical option if the original switch is malfunctioning, damaged, or missing and you want a direct-fit, OEM-style component that integrates with existing wiring without modification.