If you’re the proud owner of a 2023 Silverado 1500, Sierra 1500, or the 2024 Silverado 2500/3500 and Sierra 2500/3500 models, you might have noticed something peculiar about your optional upfitter auxiliary switches. You know, those handy little switches on the instrument panel that control your auxiliary equipment? Well, it turns out, there’s a small glitch that you should be aware of. But don’t worry, we’ve got the lowdown on what’s happening and how to fix it.

Auxiliary Switch LED Problems – The Issue

According to a recent GM TechLink article, the LED “on” indicators on the upfitter auxiliary switches (RPO 9L7) may not illuminate as they should. Specifically, if you have only one auxiliary switch turned on, the LED indicator will light up just fine. But if you decide to go switch-happy and turn on more than one, the LED indicators go dark.

Auxiliary Switch LED Problems – What’s Not Affected

Before you start thinking it’s time to replace some components or auxiliary equipment, hold your horses!  The switches themselves are working perfectly fine; it’s just the “on” indicators that are acting up. So, your auxiliary equipment will still operate as expected.

Auxiliary Switch LED Problems – The Fix

Now, let’s get to the good stuff—the solution. If you find that your auxiliary switches are not illuminating correctly, the fix is to reprogram the Body Control Module (BCM) with the latest calibrations. This is a task best left to the professionals, so head on over to your nearest GM service center for a quick fix.

Additional Information

For those who like to dig deeper, you can refer to GM Tech Bulletin PIT6040. See your dealer for more details. But honestly, the reprogramming should do the trick.

Conclusion

So there you have it,  a minor hiccup in an otherwise stellar truck experience. If you’ve been scratching your head wondering why your upfitter auxiliary switch LEDs aren’t lighting up, now you know.