| 2004 |  GMC |  Sierra 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2002 |  GMC |  Sierra 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2003 |  GMC |  Sierra 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2001 |  GMC |  Sierra 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2004 |  Chevrolet |  Silverado 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2001 |  Chevrolet |  Silverado 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2002 |  Chevrolet |  Silverado 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2003 |  Chevrolet |  Silverado 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2002 |  GMC |  Sierra 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2003 |  GMC |  Sierra 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2001 |  GMC |  Sierra 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2004 |  GMC |  Sierra 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2005 |  GMC |  Sierra 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2006 |  GMC |  Sierra 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2007 |  GMC |  Sierra 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2010 |  GMC |  Sierra 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2008 |  GMC |  Sierra 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2009 |  GMC |  Sierra 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2001 |  Chevrolet |  Silverado 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2002 |  Chevrolet |  Silverado 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2003 |  Chevrolet |  Silverado 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2009 |  Chevrolet |  Silverado 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2008 |  Chevrolet |  Silverado 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2010 |  Chevrolet |  Silverado 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2004 |  Chevrolet |  Silverado 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2005 |  Chevrolet |  Silverado 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2006 |  Chevrolet |  Silverado 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2007 |  Chevrolet |  Silverado 2500 HD | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2005 |  Chevrolet |  Suburban 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2004 |  Chevrolet |  Suburban 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2007 |  Chevrolet |  Suburban 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2006 |  Chevrolet |  Suburban 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2010 |  Chevrolet |  Suburban 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2008 |  Chevrolet |  Suburban 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2009 |  Chevrolet |  Suburban 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2001 |  Chevrolet |  Suburban 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2002 |  Chevrolet |  Suburban 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2003 |  Chevrolet |  Suburban 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2001 |  GMC |  Yukon XL 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2002 |  GMC |  Yukon XL 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2003 |  GMC |  Yukon XL 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2005 |  GMC |  Yukon XL 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2004 |  GMC |  Yukon XL 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2007 |  GMC |  Yukon XL 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2006 |  GMC |  Yukon XL 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2010 |  GMC |  Yukon XL 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2008 |  GMC |  Yukon XL 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. | 
| 2009 |  GMC |  Yukon XL 2500 | Fits 4 Wheel Drive | Fits models with RPO codes starting with "FK or FF" (FK2 - FK3 - FF6 - FF7 - FF8 - FF9) ONLY. Does NOT work on models with rear overload springs. Does NOT fit dual rear wheel models. |