2500 Pickup Rear Axles


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    Some available Rear Axle options for the 2500 Pickup are:

    Year: 2000 GMC 2500 Pickup Rear Axle

  • 4x4 (5.7L, 6.5L or 7.4L only) semi-floating (9.5" ring gear) 3.42 axle ratio (opt GU6)
  • 4x2 (5.7L, 6.5L or 7.4L only) full-floating 4.56 ratio (opt HC4)
  • 4x2 (5.7L, 6.5L or 7.4L only) full-floating 3.73 ratio (opt GT4)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating 3.42 axle ratio (opt GU6)
  • 4x4 (5.7L, 6.5L or 7.4L only) semi-floating (9.5" ring gear) 4.10 ratio (opt GT5)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating 4.56 ratio (opt HC4)
  • 4x2 (5.7L, 6.5L or 7.4L only) semi-floating 4.56 ratio (opt HC4)
  • 4x2 (5.7L, 6.5L or 7.4L only) full-floating 3.42 axle ratio (opt GU6)
  • 4x2 (5.7L, 6.5L or 7.4L only) semi-floating 3.73 ratio (opt GT4)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating (10.5" ring gear) 4.56 ratio (opt HC4)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating 4.10 ratio (opt GT5)
  • 4x2 (5.7L, 6.5L or 7.4L only) full-floating 4.10 ratio (opt GT5)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating 3.73 ratio (opt GT4)
  • 4x2 (5.7L, 6.5L or 7.4L only) semi-floating 3.42 axle ratio (opt GU6)
  • 4x2 (5.7L, 6.5L or 7.4L only) semi-floating 4.10 ratio (opt GT5)
  • 4x4 (5.7L, 6.5L or 7.4L only) semi-floating 3.73 ratio (opt GT4)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating (10.5" ring gear) 3.73 ratio (opt GT4)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating (10.5" ring gear) 3.42 axle ratio (opt GU6)
  • 4x4 (5.7L, 6.5L or 7.4L only) semi-floating 3.42 axle ratio (opt GU6)
  • 4x4 (5.7L, 6.5L or 7.4L only) semi-floating 4.10 ratio (opt GT5)
  • 4x4 (5.7L, 6.5L or 7.4L only) semi-floating (9.5" ring gear) 3.73 ratio (opt GT4)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating (10.5" ring gear) 4.10 ratio (opt GT5)


  • Year: 1999 GMC 2500 Pickup Rear Axle

  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating (10.5" ring gear) 3.73 ratio (opt GT4)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating (10.5" ring gear) 4.56 ratio (opt HC4)
  • 4x2 (5.7L, 6.5L or 7.4L only) semi-floating 3.73 ratio (opt GT4)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating 4.56 ratio (opt HC4)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating (10.5" ring gear) 3.42 axle ratio (opt GU6)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating 3.42 axle ratio (opt GU6)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating (10.5" ring gear) 4.10 ratio (opt GT5)
  • 4x2 (5.7L, 6.5L or 7.4L only) full-floating 4.56 ratio (opt HC4)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating 3.73 ratio (opt GT4)
  • 4x2 (5.7L, 6.5L or 7.4L only) semi-floating 4.10 ratio (opt GT5)
  • 4x4 (5.7L, 6.5L or 7.4L only) semi-floating (9.5" ring gear) 4.10 ratio (opt GT5)
  • 4x4 (5.7L, 6.5L or 7.4L only) semi-floating 4.10 ratio (opt GT5)
  • 4x2 (5.7L, 6.5L or 7.4L only) full-floating 4.10 ratio (opt GT5)
  • 4x2 (5.7L, 6.5L or 7.4L only) full-floating 3.42 axle ratio (opt GU6)
  • 4x2 (5.7L, 6.5L or 7.4L only) semi-floating 4.56 ratio (opt HC4)
  • 4x4 (5.7L, 6.5L or 7.4L only) semi-floating 3.73 ratio (opt GT4)
  • 4x2 (5.7L, 6.5L or 7.4L only) semi-floating 3.42 axle ratio (opt GU6)
  • 4x4 (5.7L, 6.5L or 7.4L only) semi-floating 3.42 axle ratio (opt GU6)
  • 4x4 (5.7L, 6.5L or 7.4L only) full-floating 4.10 ratio (opt GT5)
  • 4x4 (5.7L, 6.5L or 7.4L only) semi-floating (9.5" ring gear) 3.42 axle ratio (opt GU6)
  • 4x2 (5.7L, 6.5L or 7.4L only) full-floating 3.73 ratio (opt GT4)
  • 4x4 (5.7L, 6.5L or 7.4L only) semi-floating (9.5" ring gear) 3.73 ratio (opt GT4)


  • Year: 1998 GMC 2500 Pickup Rear Axle

  • 4x2 semi-floating 8 lug wheel 3.73 ratio (opt GT4)
  • 4x4 full-floating 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x4 full-floating 4.56 ratio (opt HC4)
  • 4x2 full-floating 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 8 lug wheel 4.56 ratio (opt HC4)
  • 4x2 semi-floating 6 lug wheel 4.56 ratio (opt HC4)
  • 4x2 full-floating 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel 4.10 ratio (opt GT5)
  • 4x4 semi-floating (9.5" ring gear) 3.73 ratio (opt GT4)
  • 4x4 full-floating 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating 4.10 ratio (opt GT5)
  • 4x4 full-floating (10.5" ring gear) 3.73 ratio (opt GT4)
  • 4x4 full-floating (10.5" ring gear) 4.10 ratio (opt GT5)
  • 4x4 semi-floating 3.73 ratio (opt GT4)
  • 4x4 semi-floating 3.42 axle ratio (opt GU6)
  • 4x2 full-floating 4.56 ratio (opt HC4)
  • 4x2 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x4 full-floating 3.73 ratio (opt GT4)
  • 4x4 full-floating (10.5" ring gear) 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating (9.5" ring gear) 3.42 axle ratio (opt GU6)
  • 4x2 full-floating 3.73 ratio (opt GT4)
  • 4x2 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 full-floating (10.5" ring gear) 4.56 ratio (opt HC4)
  • 4x4 semi-floating (9.5" ring gear) 4.10 ratio (opt GT5)


  • Year: 1997 GMC 2500 Pickup Rear Axle

  • 4x4 semi-floating (9.5" ring gear) 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 full-floating (10.5" ring gear) 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating (9.5" ring gear) 4.10 ratio (opt GT5)
  • 4x4 full-floating 4.56 ratio (opt HC4)
  • 4x4 full-floating (10.5" ring gear) 4.56 ratio (opt HC4)
  • 4x4 semi-floating 3.73 ratio (opt GT4)
  • 4x2 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x2 semi-floating 8 lug wheel 4.10 ratio (opt GT5)
  • 4x4 full-floating 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 8 lug wheel 4.56 ratio (opt HC4)
  • 4x4 semi-floating 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel 3.73 ratio (opt GT4)
  • 4x4 full-floating (10.5" ring gear) 3.73 ratio (opt GT4)
  • 4x2 semi-floating 6 lug wheel 4.56 ratio (opt HC4)
  • 4x4 semi-floating 4.10 ratio (opt GT5)
  • 4x4 full-floating (10.5" ring gear) 4.10 ratio (opt GT5)
  • 4x4 full-floating 4.10 ratio (opt GT5)
  • 4x4 full-floating 3.73 ratio (opt GT4)
  • 4x2 full-floating 4.56 ratio (opt HC4)
  • 4x4 semi-floating (9.5" ring gear) 3.73 ratio (opt GT4)
  • 4x2 semi-floating 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 full-floating 3.42 axle ratio (opt GU6)
  • 4x2 full-floating 3.73 ratio (opt GT4)
  • 4x2 full-floating 4.10 ratio (opt GT5)


  • Year: 1996 GMC 2500 Pickup Rear Axle

  • 4x2 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x4 semi-floating (9.5" ring gear) 4.10 ratio (opt GT5)
  • 4x4 full-floating 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating (9.5" ring gear) 3.42 axle ratio (opt GU6)
  • 4x4 full-floating 4.56 ratio (opt HC4)
  • 4x4 semi-floating (9.5" ring gear) 3.73 ratio (opt GT4)
  • 4x4 full-floating (10.5" ring gear) 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel 4.10 ratio (opt GT5)
  • 4x4 semi-floating 4.10 ratio (opt GT5)
  • 4x2 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x2 full-floating 3.42 axle ratio (opt GU6)
  • 4x2 full-floating 4.56 ratio (opt HC4)
  • 4x4 semi-floating 3.73 ratio (opt GT4)
  • 4x2 semi-floating 8 lug wheel 3.73 ratio (opt GT4)
  • 4x2 full-floating 4.10 ratio (opt GT5)
  • 4x4 full-floating 4.10 ratio (opt GT5)
  • 4x2 full-floating 3.73 ratio (opt GT4)
  • 4x2 semi-floating 8 lug wheel 4.56 ratio (opt HC4)
  • 4x2 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 full-floating (10.5" ring gear) 3.42 axle ratio (opt GU6)
  • 4x4 full-floating (10.5" ring gear) 3.73 ratio (opt GT4)
  • 4x2 semi-floating 6 lug wheel 4.56 ratio (opt HC4)
  • 4x4 semi-floating 3.42 axle ratio (opt GU6)
  • 4x4 full-floating 3.73 ratio (opt GT4)
  • 4x4 full-floating (10.5" ring gear) 4.56 ratio (opt HC4)


  • Year: 1995 GMC 2500 Pickup Rear Axle

  • 4x2 full-floating 3.73 ratio (opt GT4)
  • 4x2 full-floating 4.56 ratio (opt HC4)
  • 4x4 semi-floating 8 lug wheel 4.10 ratio (opt GT5)
  • 4x4 semi-floating 8 lug wheel 3.73 ratio (opt GT4)
  • 4x4 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x4 full-floating 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x2 full-floating 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating 8 lug wheel 4.56 ratio (opt HC4)
  • 4x4 semi-floating 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 6 lug wheel 4.56 ratio (opt HC4)
  • 4x2 full-floating 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel 3.73 ratio (opt GT4)
  • 4x2 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x4 full-floating 3.73 ratio (opt GT4)
  • 4x2 semi-floating 8 lug wheel 4.56 ratio (opt HC4)
  • 4x4 full-floating 4.10 ratio (opt GT5)
  • 4x4 full-floating 4.56 ratio (opt HC4)
  • 4x4 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)


  • Year: 1994 GMC 2500 Pickup Rear Axle

  • 4x2 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x2 full-floating 3.73 ratio (opt GT4)
  • 4x2 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x4 semi-floating 8 lug wheel 4.56 ratio (opt HC4)
  • 4x2 full-floating 4.10 ratio (opt GT5)
  • 4x4 semi-floating 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 full-floating 4.56 ratio (opt HC4)
  • 4x4 semi-floating 8 lug wheel 4.10 ratio (opt GT5)
  • 4x4 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 6 lug wheel 4.56 ratio (opt HC4)
  • 4x4 semi-floating 8 lug wheel 3.73 ratio (opt GT4)
  • 4x2 semi-floating 8 lug wheel 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel 4.56 ratio (opt HC4)
  • 4x2 full-floating 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 8 lug wheel 3.73 ratio (opt GT4)
  • 4x2 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x4 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x4 full-floating 4.56 ratio (opt HC4)
  • 4x4 full-floating 3.42 axle ratio (opt GU6)
  • 4x4 full-floating 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 full-floating 3.73 ratio (opt GT4)


  • Year: 1993 GMC 2500 Pickup Rear Axle

  • 4x4 full-floating 3.73 ratio (opt GT4)
  • 4x4 semi-floating 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 8 lug wheel 4.56 ratio (opt HC4)
  • 4x4 full-floating 4.10 ratio (opt GT5)
  • 4x4 full-floating 4.56 ratio (opt HC4)
  • 4x2 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x4 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x2 full-floating 4.56 ratio (opt HC4)
  • 4x2 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 full-floating 3.42 axle ratio (opt GU6)
  • 4x4 full-floating 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x4 semi-floating 8 lug wheel 4.10 ratio (opt GT5)
  • 4x2 full-floating 3.73 ratio (opt GT4)
  • 4x2 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x4 semi-floating 8 lug wheel 3.73 ratio (opt GT4)
  • 4x2 full-floating 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel 3.73 ratio (opt GT4)
  • 4x2 semi-floating 6 lug wheel 4.56 ratio (opt HC4)
  • 4x2 semi-floating 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating 8 lug wheel 4.56 ratio (opt HC4)


  • Year: 1992 GMC 2500 Pickup Rear Axle

  • 4x2 semi-floating 8 lug wheel 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel 3.73 ratio (opt GT4)
  • 4x2 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating 8 lug wheel 3.73 ratio (opt GT4)
  • 4x4 full-floating 4.10 ratio (opt GT5)
  • 4x2 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x2 semi-floating 6 lug wheel 4.56 ratio (opt HC4)
  • 4x4 semi-floating 8 lug wheel 4.10 ratio (opt GT5)
  • 4x4 full-floating 3.73 ratio (opt GT4)
  • 4x2 full-floating 3.73 ratio (opt GT4)
  • 4x4 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x2 full-floating 4.10 ratio (opt GT5)
  • 4x4 semi-floating 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x4 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating 8 lug wheel 4.56 ratio (opt HC4)
  • 4x2 semi-floating 8 lug wheel 4.56 ratio (opt HC4)
  • 4x2 full-floating 4.56 ratio (opt HC4)
  • 4x4 full-floating 3.42 axle ratio (opt GU6)
  • 4x4 full-floating 4.56 ratio (opt HC4)
  • 4x4 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x2 full-floating 3.42 axle ratio (opt GU6)


  • Year: 1991 GMC 2500 Pickup Rear Axle

  • 4x4 full-floating 3.73 ratio (opt GT4)
  • 4x2 full-floating 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating 8 lug wheel 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel w/o auxiliary spring 4.10 ratio (opt GT5)
  • 4x4 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x4 semi-floating 8 lug wheel 3.73 ratio (opt GT4)
  • 4x4 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x2 semi-floating 8 lug wheel auxiliary spring 4.56 ratio (opt HC4)
  • 4x4 full-floating 4.56 ratio (opt HC4)
  • 4x2 semi-floating 6 lug wheel 4.56 ratio (opt HC4)
  • 4x2 semi-floating 8 lug wheel w/o auxiliary spring 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 8 lug wheel auxiliary spring 3.73 ratio (opt GT4)
  • 4x4 semi-floating 8 lug wheel 4.56 ratio (opt HC4)
  • 4x4 full-floating 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 full-floating 4.10 ratio (opt GT5)
  • 4x4 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 full-floating 3.73 ratio (opt GT4)
  • 4x2 full-floating 4.56 ratio (opt HC4)
  • 4x2 semi-floating 8 lug wheel auxiliary spring 3.42 axle ratio (opt GU6)
  • 4x2 full-floating 4.10 ratio (opt GT5)
  • 4x2 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x2 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x2 semi-floating 8 lug wheel auxiliary spring 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel w/o auxiliary spring 4.56 ratio (opt HC4)
  • 4x2 semi-floating 8 lug wheel w/o auxiliary spring 3.73 ratio (opt GT4)


  • Year: 1990 GMC 2500 Pickup Rear Axle

  • 4x4 semi-floating 8 lug wheel 4.56 ratio (opt HC4)
  • 4x4 semi-floating 8 lug wheel 3.73 ratio (opt GT4)
  • 4x2 semi-floating 8 lug wheel w/o auxiliary spring 3.73 ratio (opt GT4)
  • 4x2 full-floating 4.56 ratio (opt HC4)
  • 4x2 full-floating 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 8 lug wheel w/o auxiliary spring 4.56 ratio (opt HC4)
  • 4x4 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x4 semi-floating 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 8 lug wheel w/o auxiliary spring 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel auxiliary spring 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel auxiliary spring 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 6 lug wheel 4.56 ratio (opt HC4)
  • 4x2 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 semi-floating 8 lug wheel w/o auxiliary spring 3.42 axle ratio (opt GU6)
  • 4x2 full-floating 4.10 ratio (opt GT5)
  • 4x4 semi-floating 6 lug wheel 3.73 ratio (opt GT4)
  • 4x4 semi-floating 8 lug wheel 4.10 ratio (opt GT5)
  • 4x4 full-floating 3.42 axle ratio (opt GU6)
  • 4x4 semi-floating 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 full-floating 4.10 ratio (opt GT5)
  • 4x2 semi-floating 6 lug wheel 4.10 ratio (opt GT5)
  • 4x2 semi-floating 8 lug wheel auxiliary spring 3.73 ratio (opt GT4)
  • 4x2 full-floating 3.73 ratio (opt GT4)
  • 4x2 semi-floating 8 lug wheel auxiliary spring 4.56 ratio (opt HC4)
  • 4x4 full-floating 4.56 ratio (opt HC4)
  • 4x4 full-floating 3.73 ratio (opt GT4)
  • 4x2 semi-floating 6 lug wheel 3.73 ratio (opt GT4)


  • Year: 1989 GMC 2500 Pickup Rear Axle

  • 4x2 model VIN C 8 lug wheel 3.73 ratio (opt GT4)
  • 4x4 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 model VIN C 8 lug wheel 4.10 ratio (opt GT5)
  • 4x4 8 lug wheel 3.73 ratio (opt GT4)
  • 4x2 model VIN C 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x4 8 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 model VIN R 4.10 ratio (opt GT5)
  • 4x2 model VIN C 6 lug wheel 4.56 ratio (opt HC4)
  • 4x2 model VIN R 3.73 ratio (opt GT4)
  • 4x2 model VIN C 6 lug wheel 4.10 ratio (opt GT5)
  • 4x2 model VIN C 6 lug wheel 3.73 ratio (opt GT4)
  • 4x4 8 lug wheel 4.10 ratio (opt GT5)
  • 4x4 6 lug wheel 4.10 ratio (opt GT5)
  • 4x2 model VIN C 6 lug wheel 3.42 axle ratio (opt GU6)
  • 4x2 model VIN C 8 lug wheel 4.56 ratio (opt HC4)
  • 4x4 8 lug wheel 4.56 ratio (opt HC4)
  • 4x2 model VIN R 4.56 ratio (opt HC4)
  • 4x4 6 lug wheel 3.73 ratio (opt GT4)
  • 4x2 model VIN R 3.42 axle ratio (opt GU6)


  • Year: 1988 GMC 2500 Pickup Rear Axle

  • 4x2 model VIN C 3.73 ratio (opt GT4)
  • 4x2 model VIN C 4.56 ratio (opt HC4)
  • 4x4 (model VIN K) 4.10 ratio (opt GT5)
  • 4x4 (model VIN K) 3.73 ratio (opt GT4)
  • 4x2 model VIN C 3.42 axle ratio (opt GU6)
  • 4x2 model VIN C 4.10 ratio (opt GT5)
  • 4x2 model VIN R 4.10 ratio (opt GT5)
  • 4x2 3.73 ratio (opt GT4)
  • 4x2 3.42 axle ratio (opt GU6)
  • 4x4 (model VIN K) 3.42 axle ratio (opt GU6)
  • 4x2 model VIN R 3.73 ratio (opt GT4)
  • 4x4 3.73 ratio (opt GT4)
  • 4x4 3.42 axle ratio (opt GU6)
  • 4x2 model VIN R 4.56 ratio (opt HC4)
  • 4x4 4.10 ratio (opt GT5)
  • 4x2 model VIN R 3.42 axle ratio (opt GU6)
  • 4x2 4.10 ratio (opt GT5)
  • 4x2 4.56 ratio (opt HC4)


  • Year: 1987 GMC 2500 Pickup Rear Axle

  • 4x4 3.42 axle ratio (opt GU6)
  • 4x2 exc. crew cab semi-floating 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab full-floating 4.10 ratio (opt GT5)
  • 4x4 3.23 ratio (opt GU5)
  • 4x2 exc. crew cab full-floating 3.42 axle ratio (opt GU6)
  • 4x4 3.73 ratio (opt GT4)
  • 4x2 crew cab 4.56 ratio (opt HC4)
  • 4x2 exc. crew cab semi-floating 3.42 axle ratio (opt GU6)
  • 4x2 crew cab 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab semi-floating 3.73 ratio (opt GT4)
  • 4x2 crew cab 3.23 ratio (opt GU5)
  • 4x2 exc. crew cab semi-floating 4.56 ratio (opt HC4)
  • 4x2 crew cab 3.73 ratio (opt GT4)
  • 4x2 crew cab 3.42 axle ratio (opt GU6)
  • 4x2 exc. crew cab full-floating 3.73 ratio (opt GT4)
  • 4x4 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab semi-floating 3.23 ratio (opt GU5)
  • 4x2 exc. crew cab full-floating 4.56 ratio (opt HC4)
  • 4x2 exc. crew cab full-floating 3.21 ratio (opt HC8)


  • Year: 1986 GMC 2500 Pickup Rear Axle

  • 4x4 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab semi-floating 3.23 ratio (opt GU5)
  • 4x2 exc. crew cab full-floating 3.21 ratio (opt HC8)
  • 4x4 3.73 ratio (opt GT4)
  • 4x4 3.42 axle ratio (opt GU6)
  • 4x2 crew cab 3.42 axle ratio (opt GU6)
  • 4x2 crew cab 4.56 ratio (opt HC4)
  • 4x2 exc. crew cab full-floating 4.10 ratio (opt GT5)
  • 4x4 3.23 ratio (opt GU5)
  • 4x2 crew cab 3.23 ratio (opt GU5)
  • 4x2 exc. crew cab full-floating 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab semi-floating 4.10 ratio (opt GT5)
  • 4x2 crew cab 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab semi-floating 3.42 axle ratio (opt GU6)
  • 4x2 exc. crew cab full-floating 3.42 axle ratio (opt GU6)
  • 4x2 exc. crew cab semi-floating 4.56 ratio (opt HC4)
  • 4x2 crew cab 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab full-floating 4.56 ratio (opt HC4)
  • 4x2 exc. crew cab semi-floating 3.73 ratio (opt GT4)


  • Year: 1985 GMC 2500 Pickup Rear Axle

  • 4x2 exc. crew cab semi-floating 3.23 ratio (opt GU5)
  • 4x2 exc. crew cab full-floating 3.21 ratio (opt HC8)
  • 4x2 crew cab 4.56 ratio (opt HC4)
  • 4x2 exc. crew cab full-floating 3.42 axle ratio (opt GU6)
  • 4x2 crew cab 3.23 ratio (opt GU5)
  • 4x2 crew cab 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab semi-floating 4.56 ratio (opt HC4)
  • 4x2 exc. crew cab semi-floating 3.42 axle ratio (opt GU6)
  • 4x4 3.73 ratio (opt GT4)
  • 4x4 3.42 axle ratio (opt GU6)
  • 4x2 crew cab 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab full-floating 4.56 ratio (opt HC4)
  • 4x4 3.23 ratio (opt GU5)
  • 4x2 exc. crew cab full-floating 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab semi-floating 4.10 ratio (opt GT5)
  • 4x2 crew cab 3.42 axle ratio (opt GU6)
  • 4x4 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab full-floating 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab semi-floating 3.73 ratio (opt GT4)


  • Year: 1984 GMC 2500 Pickup Rear Axle

  • 4x2 exc. crew cab full-floating 3.42 axle ratio (opt GU6)
  • 4x2 exc. crew cab semi-floating 4.10 ratio (opt GT5)
  • 4x2 crew cab 3.23 ratio (opt GU5)
  • 4x4 3.42 axle ratio (opt GU6)
  • 4x2 crew cab 3.42 axle ratio (opt GU6)
  • 4x2 exc. crew cab semi-floating 3.42 axle ratio (opt GU6)
  • 4x4 3.23 ratio (opt GU5)
  • 4x2 exc. crew cab full-floating 3.21 ratio (opt HC8)
  • 4x2 exc. crew cab full-floating 4.56 ratio (opt HC4)
  • 4x2 crew cab 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab full-floating 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab full-floating 4.10 ratio (opt GT5)
  • 4x2 crew cab 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab semi-floating 4.56 ratio (opt HC4)
  • 4x4 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab semi-floating 3.23 ratio (opt GU5)
  • 4x2 exc. crew cab semi-floating 3.73 ratio (opt GT4)
  • 4x2 crew cab 4.56 ratio (opt HC4)
  • 4x4 3.73 ratio (opt GT4)


  • Year: 1983 GMC 2500 Pickup Rear Axle

  • 4x4 3.23 ratio (opt GU5)
  • 4x2 exc. crew cab semi-floating 3.23 ratio (opt GU5)
  • 4x2 exc. crew cab semi-floating 4.56 ratio (opt HC4)
  • 4x4 3.42 axle ratio (opt GU6)
  • 4x2 exc. crew cab full-floating 4.10 ratio (opt GT5)
  • 4x2 crew cab 3.23 ratio (opt GU5)
  • 4x4 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab semi-floating 3.42 axle ratio (opt GU6)
  • 4x2 crew cab 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab semi-floating 4.10 ratio (opt GT5)
  • 4x2 crew cab 3.42 axle ratio (opt GU6)
  • 4x2 exc. crew cab full-floating 4.56 ratio (opt HC4)
  • 4x2 exc. crew cab full-floating 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab semi-floating 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab full-floating 3.21 ratio (opt HC8)
  • 4x2 crew cab 4.10 ratio (opt GT5)
  • 4x2 crew cab 4.56 ratio (opt HC4)
  • 4x2 exc. crew cab full-floating 3.42 axle ratio (opt GU6)
  • 4x4 4.10 ratio (opt GT5)


  • Year: 1982 GMC 2500 Pickup Rear Axle

  • 4x2 crew cab 4.56 ratio (opt HC4)
  • 4x4 3.23 ratio (opt GU5)
  • 4x2 exc. crew cab full-floating 3.21 ratio (opt HC8)
  • 4x2 exc. crew cab semi-floating 3.21 ratio (opt HC8)
  • 4x2 crew cab 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab full-floating 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab semi-floating 3.73 ratio (opt GT4)
  • 4x4 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab semi-floating 4.10 ratio (opt GT5)
  • 4x4 3.42 axle ratio (opt GU6)
  • 4x2 exc. crew cab full-floating 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab full-floating 3.42 axle ratio (opt GU6)
  • 4x4 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab semi-floating 3.42 axle ratio (opt GU6)
  • 4x2 exc. crew cab semi-floating 4.56 ratio (opt HC4)
  • 4x2 exc. crew cab full-floating 4.56 ratio (opt HC4)
  • 4x2 crew cab 4.10 ratio (opt GT5)
  • 4x2 crew cab 3.23 ratio (opt GU5)
  • 4x2 crew cab 3.42 axle ratio (opt GU6)


  • Year: 1981 GMC 2500 Pickup Rear Axle

  • 4x4 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab semi-floating 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab semi-floating 4.56 ratio (opt HC4)
  • 4x2 exc. crew cab full-floating 3.21 ratio (opt HC8)
  • 4x2 exc. crew cab semi-floating 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab full-floating 3.73 ratio (opt GT4)
  • 4x4 3.21 ratio (opt HC8)
  • 4x4 3.23 ratio (opt GU5)
  • 4x2 crew cab 3.73 ratio (opt GT4)
  • 4x2 exc. crew cab semi-floating 3.21 ratio (opt HC8)
  • 4x2 exc. crew cab full-floating 3.42 axle ratio (opt GU6)
  • 4x2 crew cab 3.42 axle ratio (opt GU6)
  • 4x2 crew cab 4.10 ratio (opt GT5)
  • 4x2 crew cab 4.56 ratio (opt HC4)
  • 4x2 exc. crew cab semi-floating 3.42 axle ratio (opt GU6)
  • 4x2 exc. crew cab full-floating 4.10 ratio (opt GT5)
  • 4x4 3.42 axle ratio (opt GU6)
  • 4x2 crew cab 3.21 ratio (opt HC8)
  • 4x4 4.10 ratio (opt GT5)
  • 4x2 exc. crew cab full-floating 4.56 ratio (opt HC4)
  • 4x2 crew cab 3.23 ratio (opt GU5)