Troubleshooting LED Trailer Lights Causing Error Code On 2021 GMC Sierra Denali 2500
Updated 05/07/2024 | Published 11/21/2020
Question:
I sold a 2021 Grand Design Solitude 5th wheel w/led lights to a couple that bought a 20GMC Denali 2500 Duramax to tow with. The trailer circut board in truck keeps burning out when plugged in. The turn signals flash, error code pop into the info screen of tow rig. Im needing help please.
asked by: Kelly L
Helpful Expert Reply:
To correct the issue the couple is having powering LED trailer lights with their 2020 GMC Sierra Denali 2500 I recommend going with the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass # 20142 due to it being a simple plug and play adapter that installs in the vehicle's 7-way connector and you simply plug the trailer's 7-way connector into it. The built in system will prevent the issues you are having and will allow you to move the adapter to a different vehicle if needed.
The Optronics Load Resistor for LED Lights # ALEDRST1B you were looking at would require you to hardwire a resistor at every light to correct the lack of amps causing the error code when trying to use a trailer with LED lights.
It is not uncommon for newer vehicles to have an issue with powering LED trailer lights as the have so low of an amp draw compared to incandescent lights that the vehicle will think a light is burned out and throw an error code like you are seeing.
I included a video of the Trailer Connector Adapter # 20142 for you to take a look at.
Product Page this Question was Asked From
Optronics Load Resistor for LED Lights - Male PL-3 Plug and Pigtail - Qty 1
- Accessories and Parts
- Trailer Lights
- Load-Resistor Kit
- Aluminum
- Optronics
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Shop: 7-Way Vehicle Power Adapter for Furrion RV Observation Camera
- Search Results: 20142
- Shop: 7-Way Trailer Adapter for Towing Trailers with LED Lights
- Search Results: trailer connector adapter w lamp~out sensor bypass ~ 7~way rv to 7~way
- Search Results: trailer jack
- Video: A Closer Look at the 7-Way Trailer Adapter for Towing Trailers with LED Lights
- Search Results: 7 pin adapter led
- Q&A: Issues Towing A Trailer With LED Lights
- Shop: etrailer Electric Trailer Jack w/ 7-Way - Drop Leg - A-Frame - 18" Lift - 5K
- Q&A: Will 7-Way Trailer Adapter C57003 Solve Power Pulse Issue On 2022 GMC Sierra 1500?
- Shop: Curt 7-Way to RV Socket LED Circuit Tester - Vehicle End
- Q&A: Will Furrion 7-Way Adapter FR87PR Fix Bulb Out Error Code of 2025 GMC Sierra 2500
- Video: In-Depth Review of the 7-Way Vehicle Power Adapter for Furrion RV Observation Camera
- Search Results: curt 57003
- Q&A: Difference Between Tow Ready # 20142 and Curt # C57003 Adapters with Lamp-Out Sensors
- Q&A: Troubleshooting Trailer Wiring Using a 2021 GMC Sierra Truck
- Search Results: ridgeway sport st
- Q&A: Will 7-Way Adapter for Lamp-Out Sensors Work on 2020 GMC Sierra 3500
- Shop: InfiniteRule Trailer Latch Lock for 3-1/8" Coupler
- Q&A: Will Trailer Connector Adapter w/ Lamp-Out Sensor Bypass Work With 2025 GMC Sierra 3500 Ultimate
- Video: Curt 7-Way to RV Socket LED Circuit Tester Review
- Shop: Trimax Coupler Latch Lock - 1/4" Pin Diameter - 3-1/2" Span
- Shop: etrailer Surge Brake Coupler Lock - 3-3/8" Span - 1/4" Diameter - Chrome
- Article: 30-Amp and 50-Amp RV Service: What's the Difference?
- Article: How to Adjust Your Trailer Brakes | The Ultimate Guide
- Shop: Brake Controller
- Video: The Low-Down on the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass
- Article: Testing Trailer Brake Magnets for Proper Function
- Article: Trailer Wiring Diagrams
Domenick C.
4/3/2024
2021 GMC Sierra. Trailer lights will sometimes work when first plugged in, then I can get all different signals on vehicle screen, “check connection”, “check turn signal” or “check brake lights”. It seems LED trailer lights aren’t drawing enough power, but incandescent will work. What can I do to make a trailer with LED lights work properly? Thank you, Domenick