GM Genuine Parts 15926102 Trailer Brake Control Switch Assembly

What this part is for

If your trailer brake control system feels off, the switch assembly is one of the components worth checking. The GM Genuine Parts 15926102 Trailer Brake Control Switch Assembly is designed as a GM-recommended replacement for a factory-style part used on compatible GM vehicles. On paper, that’s the big selling point: it’s meant to match the original component for fit, form, and function—so you’re not guessing when it comes time to replace a suspect switch.

This is the kind of part you typically buy when you’re trying to get the trailer braking controls back to normal operation. Not perfect for every situation, though—if the issue is actually wiring, the brake controller unit itself, or trailer wiring, replacing a switch alone may not fully fix what you’re seeing.

Where it fits in your setup

This assembly is intended to serve as a direct replacement for the original factory component. That matters because trailer brake control systems are safety-related and usually depend on correct connections and proper operation. A GM OE-spec replacement is built around the same requirements the original design follows, which can make installation feel more straightforward than generic alternatives.

A practical way to think about it: if you notice the trailer brake control switch acting inconsistently—like it won’t respond the way it used to—this assembly is what you’d reach for to restore the control behavior.

Key features that matter (and why you’d care)

GM positions this as a replacement that uses GM Original Equipment specifications. In plain terms, that’s aimed at reliable performance and durability, based on how the factory component was manufactured.

Here’s what that can mean for you as a buyer: - You’re selecting an OEM-style replacement rather than an unknown equivalent. - You’re prioritizing proper fit and function, which is especially valuable in systems where the wrong fit can create headaches. - You’re treating it as a repair path that aligns with how GM designed the original hardware.

Still, keep expectations realistic: replacement parts can only address the specific component they’re meant to replace. If the underlying problem is elsewhere, you may need additional diagnosis before swapping parts.

Quick comparison mindset before you buy

Many people end up comparing “OEM-recommended replacement” versus other repair approaches: generic substitutes, or a deeper troubleshooting plan before buying anything. If your goal is to restore the original feel and behavior of the factory trailer brake control switch assembly, this GM Genuine Parts option aligns well with that approach.

But if you haven’t confirmed the switch is actually the failure point, it may be smarter to verify symptoms first. Otherwise, you risk spending on a part that isn’t the root cause.

Tech specs

Name

GM Genuine Parts 15926102 Trailer Brake Control Switch Assembly

What to check before purchasing

Before you commit to any switch assembly replacement, it’s worth taking a moment to confirm the part is truly the correct match for your vehicle’s factory setup. With trailer brake control systems, even small differences can matter.

Also consider the symptoms you’re experiencing. Ask yourself whether the issue looks like a control switch behavior problem (response/action inconsistency) versus something that would point to controller output, wiring, or trailer brake connection issues.

Pros, limits, and who it’s best for

This part makes the most sense if you want an OEM-style replacement for the original factory switch assembly and you care about reliability and durability based on GM OE manufacturing specifications.

It may not be the best move if you’re still diagnosing. If you haven’t determined the switch is the culprit, you could end up replacing the wrong component first. And if your trailer braking problems are intermittent due to wiring or controller settings, this assembly alone might leave you chasing the same issue.

It’s a solid fit if you’re already working through a repair plan for your GM vehicle’s trailer brake control system and you prefer factory-spec parts over broader “works on many” replacements.

Is it worth it?

Worth buying if you’re replacing a known-fault or worn trailer brake control switch assembly and you want a GM-recommended OEM-style replacement built to OE specification for fit, form, and function. It’s also a good match if your priority is reliable restoration of how the original component behaves.

Better avoided if you don’t yet know the switch assembly is the problem. In that case, you may want to troubleshoot first, because trailer brake control issues can come from other parts of the system. When in doubt, confirm the source of the fault before you replace hardware.

Mini FAQ

How do I know the switch assembly is the problem?

You’d typically look for symptoms that point to the switch behavior itself, such as inconsistent responses from the trailer brake control switch. If the issue is more about overall braking performance, it could be elsewhere.

Is this an aftermarket replacement or an OEM part?

This is described as a GM Genuine Parts replacement, manufactured to GM Original Equipment specifications.

Will it fix all trailer brake control problems?

Not necessarily. It’s meant to replace the factory component it’s designed for, so if the root cause is wiring, the brake controller unit, or trailer connections, you may need additional repairs.

Does it come with anything besides the switch assembly?

The provided information only describes the switch assembly itself, so it’s best to review the listing’s included items details before you buy.