1999-2006 GMC Sierra 1500 4x4 - Tuff Country 2" Suspension Lift Kit

1999-2006 GMC Sierra 1500 2
Shown with Shock Absorbers (sold separately, see options)
Tuff Country #12923
Tuff Country - 12923-sierra-lift-kit-large
Authorized Dealer
Sale Price:
  • $169.99
$209.86 Save: $39.87 (19%)
Free Shipping
Usually Ships within 24 to 48 Hours (excluding Saturday and Sunday)
Arrives 1 to 5 days after product ships


This GMC Sierra Lift Kit by Tuff Country uses front replacement torsion bar keys and rear add-a-leafs to lift your Sierra 2". The included torsion bar keys reindex the factory Sierra torsion bars which lifts the truck without "cranking up" the factory torsion bars. Once installed this lift kit will keep the "Factory Rake", with the front end being slightly lower than the rear.

Note: To purchase Tuff Country 12923KN (w/SX8000 Shocks) please select in options above.

At Suspension Connection we are the #1 retailer of Tuff Country products in the world. Great prices, expert knowledge and exceptional customer service are why so many customers trust us with their Tuff Country purchase. Try us out!

Tuff Country has been producing quality suspension products for over 25 years and backs all lift kits with a limited lifetime warranty. image

Features and Benefits

  • Simple bolt-on installation
  • Adds 2" of lift to front and 1.5" to the rear of Sierra
  • Maintains the factory rake look (rear end slightly higher than the front end)
  • No need to "crank up" torsion bars
  • Allows for more tire clearance
  • Proudly Made in the USA - (many other brands are not)
  • Lifetime Warranty

Installation Notes

1. New extended shocks are recommended for this lift kit.
2. Torsion bar keys are designed to install with a stock suspension only.  Do not use with other types of lift kits.  Will void warranty.
3. Will not fit 1999 models with old body style.  See #12933 (1988-1998) to fit properly.

Tech Specs

Download Instructions: 12923 Instructions
Recommended Tire Size: N/A
Amount of Lift: 2" Front / 1.5" Rear
Items Included:

2) Front Torsion Bar Keys, 2) Rear Add-a-leafs, 1) Hardware bag

Weight: 30.00 lbs.
Part 12923 fits:
  • 2006 GMC Sierra 1500
  • 2005 GMC Sierra 1500
  • 2004 GMC Sierra 1500
  • 2003 GMC Sierra 1500
  • 2002 GMC Sierra 1500
  • 2001 GMC Sierra 1500
  • 2000 GMC Sierra 1500
  • 1999 GMC Sierra 1500

Customer Questions & Answers

Have a question about this product? Let one of our experts answer it for you!

We will respond with an answer ASAP.


  • 4.5 out of 2 Overall
  • 100% reviews recommend this product
Review Product
Great affordable way to lift your truck
The kit is everything it says it is however the istallation in my case wasnt easy. Had the truck been newer with less rust on bolts and such it would have been better. The torsion bar keys were terrible getting off but thats to be expected on a 10 year old truck. I got 285/70-17 firestone destination mts under my truck with this lift. And it looks great. Great affordable lift.
Recommend this Product: YES
2005 gmc sierra 1500 4x4
– Value
– Quality
– Installation
looks good
like the look of my Sierra with this kit. looks much bigger and more mean. Like the look, ride isn't any different. happy with it.
Recommend this Product: YES
2004 Sierra 1500
– Value
– Quality
– Installation