SWFL
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Randy, did you find a fix for this? My 2020 Sierra just started giving me the exact same messages with fast blinking turn signals. Appreciate your response.
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Random “Service Trailer Brake System” warning?
SWFL replied to mistaare's topic in Troubleshooting, Warranty & Recalls
I'd love to know if you find out what caused this? My 2020 Sierra just started the same messages. I'm getting 3 different ones. "Check right trailer turn signal lamp", "Check left turn signal lamp" & "Check trailer brake light". Truck is stock and I've not had a trailer hooked up for 4 months.
