Lane Departure Problems of GMC Yukon

The contact owns a 2021 GMC Yukon. The contact stated that while driving at various speeds, the vehicle shuddered abnormally with blue smoke coming from the exhaust, with the message "lane departure assist" displayed. The check engine and stabili-trak warning lights were illuminated. The vehicle was taken to a local service center, where it was diagnosed with cylinder #1 misfire. The local dealer was contacted. The vehicle was not diagnosed or repaired. Upon further investigation, the contact related the failure to the GMC service bulletin:15-06-01-002l. The manufacturer was made aware of the failure. The failure mileage was approximately 110,000.

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Tl the contact owns a 2018 GMC Yukon. On several occasions, while driving various speeds, the forward collision avoidance system and lane departure function became inoperable. The vehicle was taken to gerry lane Buick GMC (6615 florida blvd, baton rouge, la 70806, (225) 341-5413) where it was diagnosed that the module for the forward collision avoidance system and lane departure assist module were faulty. The vehicle was not repaired. The manufacturer was not contacted. The approximate failure mileage was 30,800.

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