had the right side fixed at 56k and now the other side is shaking when i apply the brakes at highway speed and just about rips the steering wheel out of your hands when i talked to the gm dealer here in Winnipeg they say they know about the problem but not sure how to fix either i have to pay or if i have extended warranty this problem gm knows about what is the problem fix it or do we have to wait till some one dies then have to take gm to court this is my first and last gm product and will make my problems known to anyone that may buy one of these trucks from gm if i can help them either fix there substandard parts or go out of business let me help them