4'' Big Lift Kit 2019-2023 1500 Trail Boss / AT4
The 44-39420 lift kit utilizes the very best in ReadyLIFT engineering with boxed steel front/rear cross members and full-width front skid plate constructed of thick 3/16" plate steel. New 1/4-inch boxed plate steel differential drop brackets feature a double gusset and boxed center rib to take the abuse of front differential torsional twisting. Our 4" lift kit features heavy-duty angled and offset top mount strut extensions that realigns the struts to optimize shock performance and minimize wear. A specially designed lower mount strut pre-load spacer offers the added benefit of a slight increase in spring rate to better handle the larger wheels and tires that will find their way onto this new lifted truck. To lift the rear, new fabricated steel rear blocks with integrated bump stop landings have been added as well as new rear shock extensions. With months of engineering and development and more awesome features than we could possibly mention, the bottom line is this new Big Lift Kit is the best 4" lift kit you can install on a new body style 2019-2023 GM 1500 4WD truck! Thousands of miles of road and trail testing have proven our new 4" lift kit makes these new GM 1500 trucks ride better than stock! Wheel and tire fitment information: 44-39420 6" Lift Kit - Recommended max tire with no trimming: 20x9 0 offset - 35x12.50 tire. *Max with trimming: 20x10 -18 offset - 35x12.50 or 325/60R20 *Trimming requirements for larger than recommended wheel/tire include front valance, front felt liner edge, rear felt liner edge and front-rear well edge mud flap.
- 4" lift kit for 20192023 Chevy Silverado Trail Boss and GMC AT4 1500 trucks
- Not for use on Diesel motor applications
- 18inch wheels with 12mm offset recommended
- 18x9 wheels with 0mm offset or higher not compatible
- 4"" lift kit for 2019 4"" lift kit for 20192023 Chevy Silverado Trail Boss and GMC AT4 1500 trucks
- Not compatible with rear mono Not compatible with rear monoleaf springs
- 1818inch wheels with 12mm offset recommended
- Engineered for improved ride quality and handling performance
- Includes ReadyGuard Powertrain Warranty
- Not recommended for use with Auto 4 Hi feature
- Not compatible with rear monoleaf springs
- Single Cab configuration not validated for fitment and drivability by ReadyLIFT
Application Summary:
| Year |
Make/Model |
| 2019-2023 |
Chevrolet Silverado 1500 |
| 2019-2023 |
GMC Sierra 1500 |
| Attributes |
| California Proposition 65 |
WARNING: Reproductive Harm - www.P65Warnings.ca.gov |
| Country of Origin (Primary) |
US |
| Fitment |
Direct Fitment, Direct Fitment |
| Front Lift Component |
Spacer, Spacer |
| Front Lift Height |
4 Inches, 4 Inches |
| Front Shocks |
None, None |
| Front or Rear |
Front and Rear, Front and Rear |
| GTIN |
00194933302109 |
| Harmonized Tariff Code (Schedule B) |
8708801600 |
| Hazardous Material Code |
N |
| Install Difficulty |
Difficult Requires Professional Installation, Difficult Requires Professional Installation |
| Installation Time |
5+ Hours, 5+ Hours |
| Life Cycle Status Code |
Available to Order |
| Lift/Drop Height |
4 in. |
| Max Tire Size |
35 Inch, 35 Inch |
| NAFTA Preference Criterion Code |
B |
| Rear Lift Component |
Block, Block |
| Rear Lift Height |
4 Inches, 4 Inches |
| Rear Shocks |
Bilstein, Bilstein |
| SDR Required Flag |
N |
| Shocks Included |
Yes |
