GM 10 Bolt 8.6" Rear Axle Assembly 99-05 GM 1500 2WD, 05 4WD, 3.42 Posi - USA Standard

8.6" GM 1500 Rear End Axle Assembly, 3.42 w/ LSD (Positraction) (Opt GU6) fits model years 1999-05 2WD, fits model years 2005 4WD. Replacement rear axle assemblies from USA Standard come complete with all differential components in one part number for easy, bolt-on installation.