Product Details

Description

The Tuff Country 16958 6" Lift Kit with Knuckles and a 1-Piece Sub-Frame is a bolt-on suspension upgrade designed for 2001–2006 Chevy Silverado 1500HD 4WD and GMC Sierra 1500HD 4WD, with 2001–2004 Chevy Avalanche 2500 4WD compatibility. It delivers a bold, capable stance and room for up to 35" tires, combining rugged engineering with straightforward installation.

  • Lift Height: 6" front / 4" rear
  • Knuckles: New steering knuckles eliminate the need to drop upper control arms
  • Sub-Frame: 1-piece sub-frame for increased strength and to help reduce squeaks and rattles
  • Tire Compatibility: Supports up to 35" x 12.5" tires
  • Finish / Material: Black powder-coated steel for durability and corrosion resistance
  • Shocks: Not included; factory-length shocks must be replaced with extended shocks to install properly
  • Rim Compatibility: Factory rims will not fit; requires aftermarket rims with 4.5" backspacing or less
  • Average Install Time: Approximately 8–10 hours
  • Warranty: Limited lifetime warranty
  • Vehicle Coverage: 2001–2006 Silverado 1500HD 4WD; 2001–2006 GMC Sierra 1500HD 4WD; 2001–2004 Avalanche 2500 4WD

The kit’s intelligent design focuses on real-world benefits. By using knuckles that keep steering geometry intact and a one-piece sub-frame, you gain a stronger, quieter chassis with fewer squeaks over rough roads. The bolt-on installation simplifies what can otherwise be a complex upgrade, helping you complete the project in a single weekend. With this lift, you can confidently tackle dirt roads, gravel trails, and everyday driving while enjoying the rugged presence of a lifted Silverado/Sierra. Remember to plan for extended shocks and aftermarket rims to ensure proper fitment and performance, backed by Tuff Country’s 25+ years of suspension expertise and a lifetime warranty.


Position Front/Rear
Color/Finish Black Powder Coat
Material Steel
Amount of Lift 6" Front/4" Rear
Recommended Tire Size 35" x 12.5"

Year Range Make Model Drivetrain Fitment Note
2001-2004 Chevy Avalanche 2500 4WD
2001-2006 Chevy Silverado 1500HD 4WD
2001-2006 GMC Sierra 1500HD 4WD

Specifications:


Single or Multi-Box Packaging: multi-box (3)
Weight: 100.0 lb
Length: 32
Width: 24
Height: 13


Packaging Details


FAQs

Please read our FAQs page to find out more.

Will this part fit my vehicle?

Fitment varies by year, make, model, drivetrain, and lift height. Always use the vehicle fitment selector or refer to the fitment notes on the product page before purchasing. If you’re unsure, our team can help confirm compatibility.

Are Tuff Country products street legal?

Most Tuff Country products are designed for on-road and off-road use, but local laws and regulations vary by state and country. It is the customer’s responsibility to ensure compliance with local vehicle regulations after installation.

Is professional installation required?

Professional installation is recommended but not required. Many products can be installed by experienced DIYers with proper tools. However, improper installation can affect ride quality, safety, and warranty coverage.

Will this affect my ride quality?

Tuff Country products are engineered to balance ride comfort, performance, and durability. Ride quality can change depending on lift height, vehicle setup, tire size, and other suspension components.

Are Tuff Country products covered by a warranty?

Yes. Tuff Country products are backed by a manufacturer warranty that covers defects in materials and workmanship. Warranty terms vary by product type and do not cover damage caused by misuse, improper installation, or normal wear.

Can I run larger tires with this product?

Many Tuff Country lift kits and suspension components allow for larger tire sizes, but maximum tire clearance depends on wheel offset, tire width, and vehicle configuration. Refer to the product details or contact support for guidance.

What is the return policy?

Unused, uninstalled products may be eligible for return within the stated return window. Items must be in new condition and returned in original packaging. Shipping costs and restocking fees may apply.

Who can I contact if I have questions?

Our customer support team is available to help with fitment questions, installation guidance, and order support. Reach out before purchasing if you want to ensure you’re selecting the right part for your build.

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