GM Service Manual Online
For 1990-2009 cars only

With this feature, the AWD system will automatically monitor and adjust engine power to the front and rear wheels for the best traction and handling. If there is a loss of traction or stability, the AWD system works with the electronic stability control system to increase power to the front wheels as necessary.

If the spare tire is on the vehicle, there may be a slight reduction in performance of the AWD system.

See DIC Warnings and Messages for AWD related DIC messages.