2002 Cadillac Escalade

Drive Train Axles Bearings problem
2002 Cadillac Escalade V8 All Wheel Drive Automatic 85000 miles

My 2002 Escalade recently started showing the " Service Stability System" light and when you truned a corner at slow speeds the front wheels were grabbing like an old style 4WD vehicle with locking hubs. The vehilce was sluggish to accelerate afterwards as well. The light stayed on for 3 straight days, then I took it to the dealer. The dealer said it light wasn't on when they checked and couldn't find any new codes. They can't find anything wrong with the vehicle now. I have had the fuel system cleaned, Transmission flushed, K& N air filter, etc. To attempt to fix the sluggishness. What could be the issue?
August 6, 2010.

Check the fuel pressure, change the fuel filter, and then check the engine vacuum. If you have 15 " of vacuum at idle you may have a plugged converter.

Sep 1, 2010.