Two problems related to headlights have been reported for the 2018 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 GMC Sierra 1500 based on all problems reported for the 2018 Sierra 1500.
Passenger side headlight jiggles up and down constantly over every small bump. Very distracting and leaves many black areas on the road from lack of light. Fix this immediately!.
Passengers side low beam jiggles up and down when going over small bumps. Dealer tells me its a common issue with the projector style headlights but cannot be replaced under warranty until gm recognizes it.