All Wheel Drive on 2003 Buick Rendezvous

All Wheel Drive light came on. Cable was switched and the light went off. Driving to Hilton Head, SC the light came on again. What could be the problem?

by in Owings Mills, MD on November 30, 2010
2 answers 2 comments
ANSWER by on November 30, 2010
the light comes on for a reason. turning it off never fixes it. it could be the tires are worn more either in the front or rear. or you may have a abs issue that disables the all heel drive. the tires are the more common issue. you must replace all 4 for the wheel speeds to be identical. Roy
COMMENT by on January 06, 2011
Same thing happened to mine. The AWD DISABLE light came on at Thanksgiving, stayed on....checked tire pressure and treadwear; they were fine. Finally took the car to dealer for diagnosis. It turned out to be a valve on the transfer case, the Rear Diiferential Clutch Pump Valve.
ANSWER by on September 06, 2011
You need a new flow valve. To change one, you need to locate the old one, which is located in front/bottom of the rear differential. Put a drain pan under the rear differential, disconnect the electrical connector and remove two screws and slide out. The fluid will come out and drain into the pan. Reinstall with a new flow valve. You have to add new versatrak fluid to the differential in the fill plug until it flows out. The flow valve was $400 and the versatrak fluid was $100 at the dealership for four pints. It fixed the AWD disable problem
COMMENT by on May 06, 2015
Is this the only answer you got???????
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