2" SST Lift Kit: 2025 GM AT4 & Trail Boss
NOTE: Use of Auto 4 HI feature not recommended.. NOTE: This GM 1500 kit is NOT COMPATIBLE with vehicles equipped with rear composite mono-leaf springs. The mono-leaf is easily identifiable the U-bolt is round/circular around the top of the leaf spring. This kit only works with vehicle equipped with traditional steel leaf springs identified by square U-bolts. NOTE: Not compatible with Sierra AT4X or Silverado ZR2 Edition.
- Not compatible with Sierra AT4X or Silverado ZR2 Edition.
- 2" front lift combines with factory 2" lift.
- CNC-machined billet aluminum top spacer and pre-load spacer kit with heavy-duty control arms
- 1-ton ball joints and maintenance-free pivot bushings
- Includes 3" tall OE style cast iron rear lift blocks with new U-bolts
- AT4 - Max tire 305/55-20, 20x9 0 offset wheel
- Trail Boss - Max tire 295/65-20, 20x9 0 offset wheel
- Note: Not compatible with rear mono-leaf springs. Click here to learn how to determine if you have rear mono-leaf springs.
- NOTE: These will not fit late model 2024 or 2025 applications that have round U-bolts. Using U-bolt part number 67-35120UB will allow this kit to fit 2025 applications.
Application Summary:
| Year |
Make/Model |
| 2025 |
Chevrolet Silverado 1500 |
| 2025 |
GMC Sierra 1500 |
| Attributes |
| California Proposition 65 |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| Color |
Black, Black |
| Country of Origin (Primary) |
TW |
| Front Lift Component |
Coil Spring Spacer, Coil Spring Spacer |
| Front or Rear |
Front and Rear, Front and Rear |
| Harmonized Tariff Code (Schedule B) |
8708801600 |
| Hazardous Material Code |
N |
| Install Difficulty |
Intermediate Requires some Automotive knowledge, Intermediate Requires some Automotive knowledge |
| Installation Time |
4 Hours, 4 Hours |
| Life Cycle Status Code |
Available to Order |
| Lift/Drop Height |
1 in., 2 in. |
| Material |
Steel, Steel |
| Max Tire Size |
305, 305 |
| NAFTA Preference Criterion Code |
D |
| Rear Lift Component |
Block and U-bolt, Block and U-bolt |
| Rear Lift Height |
1 Inch, 1 Inch |
| SDR Required Flag |
N |
| Shocks Included |
No |
| GTIN |
00194933406210 |
