NHTSA Complaint #11532174 — 2024 GMC SIERRA 2500

SERVICE BRAKES issue reported to NHTSA

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Complaint Details

ODI Number	11532174
Vehicle	2024 GMC SIERRA 2500
Component	SERVICE BRAKES
Date of Incident	July 13, 2023
Date Filed	July 13, 2023
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	MO

Consumer Description

When attached to a trailer with solar panels, the truck will intermittently disconnect the trailer electronics which disables the trailer brakes and trailer lights. This is because the solar energy is back flowing to the truck via 7 pin connector and overloading the circuit. Having a truck disable the trailer brakes and lights intermittently is very dangerous. Earlier model years of this truck do not suffer this issue. GM is aware and has TSB but no solution has been found on the truck side without disabling the solar panels on the trailer.

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