The transmission went out, the engine is making a noise and a service center said lots of gm's vehicles are having the same problem the power steering system also stop working and i have to replace it
Vehicle shakes/vibrates above 35 mph. when vehicle accelerates above 35 mph the the steering will vibrate with a feeling that the suspension is shimmying/shuddering rapidly. this is especially bad on an incline from a stopped position. as the vehicle accelerates up the incline, when approximately 35 mph is attained, the entire vehicle will steadily shudder/vibrate. traveling at highway speeds the vehicle will randomly vibrate in the front end and in the steering wheel. this occurs with brand new tires that have been balanced and re-balanced to confirm it is not tire related.
At 64,497 my wife's power steering went out on her vehicle. this happened a day after our trip to atlanta, ga. we took it to our local gmc dealership and was notified that 4 modules had to be replaced and a recommended wiring harness. in 2015 gmc vehicles had a similar issue and recall but not the 2016. this cost me $1400 in repairs.
Excessive vibration/buffeting drone issues (at all speeds of the vehicle) have caused severe health issues and safety hazards from driving the vehicle. within the first 8,000 miles of owning the car, the car has now been in service for 40 days as gm tries and remedy the problem, but there does not appear to be a fix. so far, diagnostic tests indicated that there was a faulty bearing in the rear differential that led to significant abnormal wear throughout the differential and the differential needed to be rebuilt. when rebuilding, they discovered that the disassembled differential had heavily scored bearings and metal shaving throughout every bearing. ring gear and pinion had irregular wear causing a drone in the vehicle. race surfaces wear ground and scarred bad.the rebuilt differential did not fix the issue and now after having four new tires and road balancing, the problems didn't diminish but were exacerbated. after rebuilding the differential again, gm has now determined that the rear axle may need to be replaced and engineers are looking into the problem further. the steering wheel shakes and the car has a terrible vibration that worsens every time gm attempts to service the vehicle. this seems to be a well-documented problem that gm has avoided fixing. we advise other consumers to be aware of the serious safety problems related to the poor manufacturing of the vehicle and inability of gm to remedy the problem.