AT4/AT4X/Trail Boss/ZR2 are popular with the interior upgrades, paint matched bumpers and door handles (or the upgraded black bumpers AT4X/ZR2), and black trim instead of chrome. They also have an increased ride height over the other models, essentially a leveling kit with also a lift block added in the rear. The AT4 and Trail Boss still have cheap shocks and a hefty nose down rake. The AT4X and ZR2 have upgraded shocks (Multimatic DSSV) which are better but still leaving a lot of performance and ride quality on the table.
Cognito 1-Inch Elite Ball Joint Leveling Kit with Fox 2.5 Elite Performance Series Shocks for 2019-2025 Chevy Trail Boss/ZR2 & GMC AT4/AT4X 1500 2WD/4WD
- Note: Does not fit models that are not the AT4/AT4X/Trail Boss/ZR2, unless a rear lift block and bump stop spacer is added.
- Enhances the Trucks Appearance and Reduces the Factory Nose Down Rake
- Maintains Adequate Droop Travel for Superior Ride Quality
- Fox 2.5 Performance Elite Series Remote Reservoir Shocks
- Cognito SM Series Upper Control Arm Kit
- Yields 1 Inch of Front Lift
- Improved Ball Joint Angle
- 4-hour DIY Install Time
- Made in the USA
Vehicle Fitment
| Years |
Make |
Model |
Trim |
| 2019–2025 |
Chevrolet |
Silverado 1500 |
|
| 2019–2025 |
GMC |
Sierra 1500 |
|
| Air Freight Prohibited: false |
| Not Carb Approved: false |
| Carb Acknowledgement Required: false |
| Ltl Freight Required: false |
| Prop 65: Y |
| Part Type: automotive |
| Epa: N/A |
| Regular Stock: false |
| Units Per Sku: 1 |