Problems with 2003 GMC Yukon EQUIPMENT

I was sold a used car in florida with deployed airbags. i need help in getting this problem corrected. the shop that fixed the car as well as the used car dealer say that they don't have to do anything and i beg to differ as they represented the car as being fixed 100%. *jb

I have a 2003 gmc yukon with approx. 89,000 miles. all of a sudden the speedometer began acting erratic. showing 60 mph when stopped. *jb

Hydraulic brake system. vehicle was sitting in driveway without use for a few weeks. when used brakes were very spongy, long pedal travel before reaction then extended stopping distance. fluid level ok, clear appeared normal, no apparent leaks, normal temperature. drove to dealer carefully, service manager when moving vehicle said he almost ran through the back otf the building. vehicle not in any accidents, service maintenance conducted at normal intervals according to service recommendations. approximately 27000 miles on vehicle. driven by myself 50 years old and my wife 47 years old safe drivers speed limit speeds large amount of stopping distance for braking not jamming on brakes at last minute. i scheduled vehicle for service at win kelly chevrolet where purchased for brake check and 30,000 mile checkup. while there they advised it was interior failure of master cylinder and they replaced it under warranty. the brakes feel a little better but the pedal still moves approximately 4" before applying any pressure. i feel this is still a problem and will be taking it back to the dealer again. i believe they have a problem with the system like they had on previous s10 models in late 90's with the slow speed braking recall. just want to send a complaint for you to be aware of in case you receive more complaints. i emailed a letter to gm while it was in the shop with the same comments and the reference to the previous for the smaller versions in the late 90's and have yet to receive a response. if this is the same problem then they may have a valve design, operation or part assemble/install defect with the system. *nm

dt: contact states while driving approximately 70 mph vehicle loses complete power. the service dealer states the vehicle has an electrical problem, and they will try to repair the problem. service dealer replaced the navigation system, thinking this was the remedy, but the problem recurred. vehicle is at the service dealer, and has been their on numerous occasions.*ak

I have had ongoing problems with my 2003 gmc yukon. it started in september of 2004 with my rear air not working, it was inoperable; and, a popping noise in my steering, the steering felt loose. the rear air was temporarily fixed in october of 2004 but continues to be a problem now in september of 2005, one year later. i've never really had rear air since i bought the vehicle, it works occasionally. i still have no rear air and vehicle has been in the shop more than 7 times for this problem. it took until january of 2005 to fix the steering problem. i've also had problems with my speedometer, which quit working in december of 2004 and the part was on back order and i had to take my vehicle in and leave for the dealership to send the speedometer to california for reprogramming, this problem was fixed in january of 2005. *nm