Your vehicle came factory with 4 GM differential options.
7.5 inch. 7.625 inch. 8.5 and 9.5 inch.
There were also 2 Dana options: 9.75 and 10.5 inch.
Measure both old and intended new differentials from front of yoke to front edge of axle tubes. Measure width if axle housings from backing plate to backing plate. Measure mounting locations. Lastly, measure yoke tilt, the angle the housing and yoke make.
Saturday, December 31st, 2011 AT 8:55 AM