O2 Sensor Problems of Buick Enclave

We purchased a 2011 Buick Enclave for what we thought was a great deal. We were prepared to pay for basic maintenance right after purchase. The check engine light came on as we were driving on the highway. I noticed loss of power while on cruise control(set at 65mph) and the vehicle started shaking. I noticed the rpm jumping from 1 to 2 . We took the vehicle to Buick for repairs. We had a tune up, 2 catalytic converters replaced, 3 O2 sensors replaced along with one other one that I'm not sure the name, oil change, struts and shocks, rear sway bar links, air filter, and a gasket manifold. We have not had this vehicle longer than 2 months. The vehicle is still doing the same thing. Today after we picked it up from the shop(no check engine light) we drove it on the highway and now the service traction control light is on along with stabilitrak control. We have 6 children. This is dangerous. What are we to do?.

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Tl-the contact owns a 2010 Buick Enclave. The contact stated while driving 40 mph the vehicle stalled without warning and there was no warning lights indicated that there was a problem. The vehicle was towed to the dealer and the technician diagnoses the failure that the ground wires from the 02 sensor had shortened out. The vehicle was repair but not under warranty. The contact also mentioned there was other problems with the vehicle which was repaired under the warranty such the transmission would not shift out of third gear. The air condition failed three different times. The sterring gear leaked. The rear brake pad and springs had to be replaced. The engine light continuosuly stayed on with the mode switch had a shortage. The manufacturer was notified who stated there is no recall on the vehicle for any failures. The failure mileage and current mileage was 35,000. Mw.

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