GM 10 Bolt 8.6" Rear Axle Assembly 03-06 SUV 4WD, 3.73 - USA Standard

8.6" GM SUV Rear End Axle Assembly, 3.73 gear ratio. Standard Open Differential (Opt GT4) fits model years 2003-06, 4WD w/JL4 active brake control. Replacement rear axle assemblies from USA Standard come complete with all differential components in one part number for easy, bolt-on installation.