GM GENUINE PARTS Trailer Brake Control Switch Assembly 15926102 — OE-fit replacement, restores trailer brake signaling

GM Genuine Parts 15926102 is the original-equipment trailer brake control switch assembly engineered to restore factory brake-signaling and trailer stopping response on compatible GM vehicles.

This OEM switch assembly from GM Genuine Parts is designed, engineered, and tested to GM specifications to communicate brake pedal input to an attached trailer's braking system. It replaces the factory-installed component and ensures the trailer brake system receives the correct signal and proportional braking effort when you apply the vehicle brakes. Built to GM's quality and durability standards, this part is suitable for owners seeking a factory-fit replacement validated by General Motors.

How does this switch affect trailer braking performance?

The switch translates the vehicle brake pedal motion into an electrical signal that engages the trailer's brake controller. A properly functioning switch helps the trailer brakes apply in proportion to the towing vehicle's braking, improving coordinated stopping behavior. It does not change brake hardware—rather, it ensures the brake control system receives accurate input.

• Restores correct brake signal timing between vehicle and trailer
• Helps maintain proportional braking response under deceleration
• Designed to meet GM Original Equipment electrical and mechanical specs

What makes GM Genuine Parts 15926102 a recommended replacement?

This part is recommended by GM as a direct replacement for the original factory component, manufactured to the same specifications used during vehicle production. Using this OE replacement helps preserve fit, function, and compatibility with your vehicle's existing wiring and brake control modules. It's backed by GM’s validation and quality control processes.

• Engineered to GM Original Equipment form, fit, and function
• Tested and validated to GM performance standards
• Compatible with OEM mounting and electrical connectors

How do I know if I need to replace the trailer brake control switch?

Replace the switch when trailer braking becomes inconsistent, when the vehicle's brake warning indicators relate to trailer circuits, or after visible damage to the switch or connector. Technicians also recommend replacement if diagnostic checks show intermittent signals between the brake pedal and trailer brake controller. Installing the correct OE switch helps eliminate wiring or signal-related troubleshooting steps.

• Intermittent or no trailer brake engagement during braking
• Dashboard alerts tied to trailer brake circuits or modules
• Physical damage, corrosion, or connector wear at the switch assembly

How is installation and compatibility handled?

The 15926102 switch is made to match the original component’s mounting points and connector types for direct replacement on compatible GM vehicles. Installation typically requires basic hand tools and may involve accessing the pedal assembly or under-dash area depending on model year. For vehicle-specific fitment and any required programming, consult the vehicle’s service manual or a GM-certified technician.

• Direct-fit design for OEM mounting and wiring interfaces
• Installation may require minor removal of trim or pedal access panels
• Confirm vehicle fitment with VIN or dealer parts lookup before purchase

Who is this for: This GM Genuine Parts 15926102 switch assembly is intended for GM vehicle owners, fleet managers, and technicians who need a factory-equivalent replacement for a malfunctioning trailer brake control switch. It suits anyone who wants to maintain original equipment performance, preserve vehicle compatibility, and avoid aftermarket fitment issues when restoring proper trailer brake signalling. For accurate fitment and safe towing performance, pair the part with appropriate trailer brake controllers and follow GM service recommendations.