How to Fix Hyperflash for 2025 GMC Sierra 3500 With 2024 5th Wheel Trailer
Updated 10/30/2025 | Published 02/19/2025
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Question:
Good morning, I have a 2025 gmc sierra 3500hd and a 2024 5th wheel rv, both have led lights but im getting the hyper flash, do you know of an easy fix?
asked by: Jerry
Expert Reply:
Hi Jerry; the standard solution for solving hyperflash problems is load resistors. The easiest way to do this is to add the Trailer Connector Adapter # 20142 you looked at. This has built in resistors to solve the issue. The Curt # C57003 will also work if that design is better for your setup. The other option is to splice in resistors like # DI34ZR but that doesn't really fall under the "easy" category for most people. If you have any other questions don't hesitate to reach out in the comments below.
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Robin H.
10/30/2025
Hey Jerry, did the trailer connector adapter take care of the hyperflash on your Sierra and fifth wheel? Knowing what worked might help others dealing with the same LED light issue.