gmc-sierra-2500hd-header

Featured Sierra 2500HD/3500HD 3.5″ Lift Kit

2011-2015 4wd

Tuff Country EZ-Ride suspension’s 3.5″ lift kits for the Sierra 2500HD/3500HD are an affordable lift solution that will allow for up to 35 inch tires (w/minor trimming). The replacement torsion bar keys reindex the factory torsion bars, while the new upper control arms keep the front end in proper geometry. 1″ blocks and extended u-bolts raise the rear end. Also includes front shock relocation brackets, new shocks not required.

13085-tuff

Fits Years: 2011, 2012, 2013, 2014, 2015

  • Reindexes factory torsion bars without “cracking up”
  • New upper control arms keep proper geometry
  • Bolt-on installation, no drilling required
  • New shocks not required
  • Limited Lifetime Warranty
  • Made in the USA

 

 

Featured Sierra 2500HD 4″ & 6″ Lift Kits

2001-2010 4wd – kits w/subframe

Tuff Country EZ-Ride Suspension’s IFS lift kits for 2001-2010 Sierra 2500HD & 3500HD trucks allow up to 36″ tires and more fender clearance. These lift kits are built around a 1 piece or 3 piece sub-frame along with heavy duty steering knuckles for strength and durability. These suspension kits maintain a factory ride and install without special tools.

16985-tuff

Fits Years: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010

  • Allows use of up to 35″ tires
  • 1 piece or 3 piece subframe for strength and durability
  • Maintains a factory ride
  • Heavy Duty replacement steering knuckles
  • Lateral compression arms included in 6″ lift kits
  • Limited Lifetime Warranty
  • Made in the USA

Vehicle Applications

Model Years Size W/O
Shocks
W/SX6000
Shocks
W/SX8000
Shocks
GMC Sierra 2500HD 4wd 2011-2015 2″ 12034 12034KH 12034KN
Instruction Manual: #12034 Instructions
Average Install Time: 4 to 6 Hours
Recommended Tire Size: N/A
Rim Backspacing: Standard
Install Notes: New shocks are optional, not required
GMC Sierra 2500HD 4wd

w/o factory contact overloads
2011-2015 3.5″ 13085 13085KH 13085KN
Instruction Manual: #13085 Instructions
Average Install Time: 8 to 10 Hours
Recommended Tire Size: 33″ x 12.5″ or 35″ x 11.5 (w/ trimming)
Rim Backspacing: 5.5″ or less (requires new rims)
Install Notes: New shocks are recommended, not required
GMC Sierra 3500HD 4wd

w/ factory contact overloads (includes dually models)
2011-2015 3.5″ 13090 13090KH 13090KN
Instruction Manual: #13090 Instructions
Average Install Time: 8 to 10 Hours
Recommended Tire Size: 33″ x 12.5″ or 35″ x 11.5 (w/ trimming)
Rim Backspacing: 5.5″ or less (requires new rims)
Install Notes: New shocks are optional, not required
GMC Sierra 2500HD 4wd

(includes dually models)
2011-2015 6″ 16085 16085KH 16085KN
Instruction Manual: #16085 Instructions
Average Install Time: 8 to 10 Hours
Recommended Tire Size:

35″ x 12.5″

Rim Backspacing:

New Rims with backspacing required, depends on wheel diameter see instructions for specific sizes

Install Notes: New shocks are required
GMC Sierra 3500HD 4wd 2011-2015 6″ 16090 16090KH 16090KN
Instruction Manual: #16090 Instructions
Average Install Time: 8 to 10 Hours
Recommended Tire Size: 35″ x 12.5″
Rim Backspacing: New Rims with backspacing required, depends on wheel diameter see instructions for specific sizes
Install Notes: New shocks are required
GMC Sierra 2500HD 4wd

Includes rear add-a-leafs
2001-2010 2″ 12924 12924KH 12924KN
Instruction Manual: #12924 Instructions
Average Install Time: 4 to 6 Hours
Recommended Tire Size: N/A
Rim Backspacing: Standard
Install Notes:

Models with purple marked factory torsion bar keys use part #12954. New shocks are optional, not required.

GMC Sierra 2500HD 4wd

Includes rear lift blocks
2001-2010 2″ 12934 12934KH 12934KN
Instruction Manual: #12934 Instructions
Average Install Time: 4 to 6 Hours
Recommended Tire Size: N/A
Rim Backspacing: Standard
Install Notes:

Models with purple marked factory torsion bar keys use part #12964. New shocks are optional, not required

GMC Sierra 2500HD 4wd

Includes one piece sub-frame
2001-2010 4″ 14985 14985KH 14985KN
Instruction Manual: #14985 Instructions
Average Install Time: 8 to 10 Hours
Recommended Tire Size: 33″ x 12.5″
Rim Backspacing: 4.5″ or less (requires new rims)
Install Notes: New shocks are required. Excludes dually models.
GMC Sierra 2500HD 4wd

Includes 3 piece sub-frame
2001-2010 4″ 14993 14993KH 14993KN
Instruction Manual: #14993 Instructions
Average Install Time: 8 to 10 Hours
Recommended Tire Size: 33″ x 12.5″
Rim Backspacing: 4.5″ or less (requires new rims)
Install Notes: New shocks are required. Excludes dually models.
GMC Sierra 2500HD 4wd

Includes one piece sub-frame
2001-2010 6″ 16985 16985KH 16985KN
Instruction Manual: #16985 Instructions
Average Install Time: 8 to 10 Hours
Recommended Tire Size: 35″ x 12.5″
Rim Backspacing: 4.5″ or less (requires new rims)
Install Notes: New shocks are required.  Excludes dually models.
GMC Sierra 2500HD 4wd

Includes 3 piece sub-frame
2001-2010 6″ 16993 16993KH 16993KN
Instruction Manual: #16993 Instructions
Average Install Time: 8 to 10 Hours
Recommended Tire Size: 35″ x 12.5″
Rim Backspacing: 4.5″ or less (requires new rims)
Install Notes: New shocks are required.  Excludes dually models.
GMC Sierra 3500HD 4wd

Includes one piece sub-frame (includes dually models)
2001-2006 4″ 14990 14990KH 14990KN
Instruction Manual: #14990 Instructions
Average Install Time: 8 to 10 Hours
Recommended Tire Size: 33″ x 12.5″
Rim Backspacing: 4.5″ or less (requires new rims)
Install Notes: New shocks are required.  Excludes dually models.
GMC Sierra 3500HD 4wd

Includes 3 piece sub-frame (includes dually models)
2001-2006 4″ 14994 14994KH 14994KN
Instruction Manual: #14994 Instructions
Average Install Time: 8 to 10 Hours
Recommended Tire Size: 33″ x 12.5″
Rim Backspacing: 4.5″ or less (requires new rims)
Install Notes: New shocks are required.  Excludes dually models.
GMC Sierra 3500HD 4wd

Includes one piece sub-frame (includes dually models)
2001-2006 6″ 16990 16990KH 16990KN
Instruction Manual: #16990 Instructions
Average Install Time: 8 to 10 Hours
Recommended Tire Size: 35″ x 12.5″
Rim Backspacing: 4.5″ or less (requires new rims)
Install Notes: New shocks are required.  Excludes dually models.
GMC Sierra 3500HD 4wd

Includes 3 piece sub-frame (includes dually models)
2001-2006 6″ 16994 16994KH 16994KN
Instruction Manual: #16994 Instructions
Average Install Time: 8 to 10 Hours
Recommended Tire Size: 35″ x 12.5″
Rim Backspacing: 4.5″ or less (requires new rims)
Install Notes: New shocks are required. Excludes dually models.