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Thanks for your input! I was under the presumtion that my '05 Tahoe's 100K powertrain warrenty was through GM... I guess I should look into that first! I guess I mis-stated the 4WD Low situation. When I start my truck it will all readdy be in 4WD Low and will not shift out of it until I turn...

Does anyone know if 4WD issues are covered in the 100K powertrain warrenty? My Tahoe keeps displaying "Service 4WD". The truck likes to disengage its 4WD when ever it likes or engage in 4WD Low while driving. I recently have had the oil changed and the the Tech. said that the rear differentials...