Alternator/generator/regulator problems of the 1999 Oldsmobile Bravada

On 11 Apr 2005, I purchased a 1999 Oldsmobile Bravada from a nh dealer, with approx. 74000 miles on it. Within one week, the vehicle was returned for a bad water pump, and driver's window switch. During the week of 21 April, I had the alternator replaced. This vehicle had a nh state inspection sticker, but it has yet to pass a MA state inspection. The air injection pump that assists in the air/fuel mix has been updated by gm, but their "update" allows them to call it something other than a recall, so, it would cost me an additional $400-500. For this "update". In Sep of 2005, I noticed a gradually growing noise from the front end. I was told the entire front end was wiped out. The safety issues alone were exhaustive. The following had to be replaced, and were done, to the cost of $1700. : pitman arm / idler arm / upper, lower ball joints / cv joints,axles,boots/ entire front hub assemblies / front brakes (rotors,pads,calipers) / 4 tires currently, the driver's front door is sagging due to poor door pins and bushings. Maaco wants $1200. To replace the hinges, pins, and bushings, and repair/replace the striker plate and surrounding area. The directional signal sounds constantly even without using the signal, and goes away when you step on the brake (!?) the key frequently gets stuck in the ignition and won't come out. Last month yet another alternator had to go in as the other failed. I had this back in the shop yesterday 01feb06 for a banging sound coming from the front end, and the technician advised me that he called gm. They confirmed there is a defective front torsion bar in these blazer-type vehicles. The technician stated it would cost me around $250. It never ends. I am truly exhausted both mentally and financially with this car. Please provide any assistance you can. The dealer won't take it back, will not assist, and gm does not want anything to do with me. They won't even take my call. I truly fear for my and my family's safety.