Two problems related to differential unit have been reported for the 2003 Chevrolet Suburban. The most recently reported issues are listed below.
Power train, loud whining regardless of speed coming from rear z71 4x4 Suburban, took to power train specialist, replaced differential 552. 00.
When vehicle's speed reached between 45-70 mph there was a grinding noise in the front end. The dealership found metal shavings in the front differential fluid. The dealership changed all the front end components in an attempt to correct the problem, but the problem still existed.