Solution for 2020 GM Truck that Won't Recognize Trailer Wiring Connection
Updated 05/06/2026 | Published 03/21/2022
Question:
We have a 2020 chevy pickup 2500. Our truck disnt recognize our trailer when hooked up so lights dont work. The chip in new gm trucks dont recognize a trailer if it is under .55 ma. Our trailer is only .50ma so the truck dosnt recognize it. Dealer and gm manufacturer wont do anything. Lots of complaints on sites about this problem with gm trucks. Do you have any thing that can help? Please
asked by: Jeanne A
Expert Reply:
What you need is more resistance on your trailer wiring circuits so that your truck thinks a trailer is connected. So what you could do is install the load resistors part # DI34ZR on two of your trailer wiring circuits and your truck would draw more amperage when connected and you'd be good.
Zack
5/6/2026
Tried adding the resistors and no luck. Tried hooking up to 3 other trailers and they all work (some with LED) just fine with my truck. The trailer is brand new and we hooked it up to our neighbors truck and the new trailer works perfectly fine with the other truck.
Jameson C.
5/6/2026
Jameson C.
5/6/2026
Product Page this Question was Asked From
Load Resistor Kit for LED Turn Signals - 50 Watts - 6 Ohm - Qty 2
- Accessories and Parts
- Trailer Lights
- Load-Resistor Kit
- Diamond
more information >
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Terry D.
12/31/2025
I used the exact connectors listed and no change in symptoms - 2019 Cheverolet Silverado 1500 - truck still does not recognize that the trailer is hooked up.