NHTSA Complaint #11670575 — 2018 GMC YUKON

POWER TRAIN issue reported to NHTSA

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Complaint Details

ODI Number	11670575
Vehicle	2018 GMC YUKON
Component	POWER TRAIN
Date of Incident	June 14, 2025
Date Filed	July 1, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	DE

Consumer Description

My 2018 GMC Yukon SLE has a Transmission Failure and a engine oil coolant failure. The issues occurred while driving when the vehicle had to go into limp status to prevent the transmission from complete failure. I have taken the vehicle to the dealership 2x and they changed the fluid once and replaced the thermostat the second time. Neither case fixed the vehicle, it is currently in the shop for transmission and radiator w/ engine oil cooler replacement - $8200 The vehicle has been inspected by Aamco of Dover, DE and is awaiting inspection by warranty company 3rd party inspector. There are no warnings before the system is overheated and goes into limp status and at that point an alarm sounds in the car.

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