Question about 2003 Pontiac Aztek
You'll need someone with a scan tool to see what is actually wrong but I've replaced a number of a part called a "Differential Check Valve" for this type of problem. When this part fails it can send a faulty signal the the controller indicting an overheated rear differential or it can just simply quit working altogether. Either type of failure will cause the "AWD Disabled" message to come on and the all wheel drive system will be disabled as a result. If you end up replacing this part I would strongly recommend replacing the fluid in the differential at the same time as I've seen a number of other problems caused by dirty oil in these. It takes a special GM only lubricant in these and do not use any other kind of fluid in it as they won't work correctly with anything else. Good luck and hope this helps!
Posted on Jul 30, 2010
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Posted on Jan 02, 2017
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