Awd light stays on low fuel lght even w/full tank of gas..

We have dumped over $5000 into mine in the past 1.5 yrs and the "service engine soon" light has never gone off for more than 3 days. fuel gauge reads either full or empty w/no rhyme or reason. this causes the "low fuel" light to randomly come on. i hear strange noises that SOUND like some sort of brake issue, but 2 mechanics have checked them and said they were fine. this causes the "awd disable" and "anti-lock" lights to randomly come on. one day i was driving down the road and glanced at the dash to be mesmerized by what looked like disco lights because the dash was flashing: *SECURITY * *LOW FUEL* *AWD DISABLE* *SECURITY*
My entire family has been driving GM vehicles exclusively (mostly Buicks and Chevys) for over 60yrs. I was raised by war veterans and union members and I believe very strongly in buying American. I am a union member myself, and am disgusted daily by all the foreign cars on the roads. But I am so disturbed by the number of problems I've had with this ONE vehicle in less than 2 years (and the fact that so many of us have had so many problems that remain to be solved or even acknowledged), I am seriously considering never buying GM again. I will have to swallow my gm pride and buy a jeep or a dodge and pray that they haven't ALL failed us.