Problem started about a month ago-airbag light flashed and I felt "something" when braking. Then, Bravada started stalling when braking. Cleaned (Husband, not me) the throttle body, cleaned the EGR, no faults when hooked up to the Snap On computer, changed the plugs, fuel filter, etc., Car "runs" like new, solid engine idle, but when driving to work today, the radio was off, turned it on, heard a noise, and the air bag light flashed. Driving home from work, all the dashboard lights flashed, but the car continued to run just fine. What else can we look for? Bought a new SUV, and need to sell this, but want it to be in a little better condition?{Po