Cognito 2.5 Inch Standard Lift Kit, 2024-2025 AT4X/ZR2 L5P
Fits: 2024 thru 2025 Chevy Silverado/GMC Sierra 2500HD/3500HD AT4X/ZR2 L5P Duramax Diesels
The Cognito 2.5 Inch Standard Lift Kit for 2024-2025 AT4X/ZR2 L5P models provides a true 2.5" front lift and a 0.5" rear lift by replacing the rear block and adding diff drops. This kit includes a new subframe and taller knuckles to increase front suspension droop travel to 3", reducing shock top-out over bumps. It retains the OEM Multimatic DSSV shocks with minor front modifications, while the rear shocks remain unchanged. Though the lift improves ride height and suspension travel, it may cause faster wear on pitman and idler arms, where an additional support kit is recommended. For enhanced suspension performance, consider packages with upgraded shocks and control arms.
Features:
-
Adds 2-1/2" front and 1/2" rear lift
-
Improves ride quality by adding front suspension droop travel
-
Retains the OEM Multimatic DSSV shocks
-
Includes billet front shock clevis bracket
-
Allows for up to 37x12.50 tire on max 10" wide wheel with 0mm to +19mm offset
-
OEM AEV Edition SALTA wheels do fit with up to 37x12.5 tire. Non AEV wheel fitment TBD.
-
Stock tire or 35x12.5 tire on stock wheel
This will look small in our opinion, 12.5 wide tire might need 1/4" wheel spacer.
-
37x12.50 tire on stock wheel
Will require a wheel spacer at least 1/4” thick. A 1.5” wheel spacer looks really good. Use tie back kit plus medium trimming.
-
35 on 10” wide wheel +18mm offset
Use tie back kit plus medium trimming.
-
35 on 10” wide wheel, 0mm offset
Use tie back kit plus medium trimming.
-
37x12.50, 9” wide wheel +18mm offset
Use tie back kit plus medium trimming.
-
37x12.50, 9” wide wheel, 0mm offset
Use tie back kit plus heavy trimming.
-
37x12.50 on 10” wide wheel, 0mm offset
Use tie back kit plus excessive trimming. Might have an occasional rub.
Installation:
-
Install #7024
-
Install #7459
-
Install #7565
-
Install #7566
Warranty:
- Limited Lifetime

Description
Fits: 2024 thru 2025 Chevy Silverado/GMC Sierra 2500HD/3500HD AT4X/ZR2 L5P Duramax Diesels
The Cognito 2.5 Inch Standard Lift Kit for 2024-2025 AT4X/ZR2 L5P models provides a true 2.5" front lift and a 0.5" rear lift by replacing the rear block and adding diff drops. This kit includes a new subframe and taller knuckles to increase front suspension droop travel to 3", reducing shock top-out over bumps. It retains the OEM Multimatic DSSV shocks with minor front modifications, while the rear shocks remain unchanged. Though the lift improves ride height and suspension travel, it may cause faster wear on pitman and idler arms, where an additional support kit is recommended. For enhanced suspension performance, consider packages with upgraded shocks and control arms.
Features:
-
Adds 2-1/2" front and 1/2" rear lift
-
Improves ride quality by adding front suspension droop travel
-
Retains the OEM Multimatic DSSV shocks
-
Includes billet front shock clevis bracket
-
Allows for up to 37x12.50 tire on max 10" wide wheel with 0mm to +19mm offset
-
OEM AEV Edition SALTA wheels do fit with up to 37x12.5 tire. Non AEV wheel fitment TBD.
-
Stock tire or 35x12.5 tire on stock wheel
This will look small in our opinion, 12.5 wide tire might need 1/4" wheel spacer.
-
37x12.50 tire on stock wheel
Will require a wheel spacer at least 1/4” thick. A 1.5” wheel spacer looks really good. Use tie back kit plus medium trimming.
-
35 on 10” wide wheel +18mm offset
Use tie back kit plus medium trimming.
-
35 on 10” wide wheel, 0mm offset
Use tie back kit plus medium trimming.
-
37x12.50, 9” wide wheel +18mm offset
Use tie back kit plus medium trimming.
-
37x12.50, 9” wide wheel, 0mm offset
Use tie back kit plus heavy trimming.
-
37x12.50 on 10” wide wheel, 0mm offset
Use tie back kit plus excessive trimming. Might have an occasional rub.
Installation:
-
Install #7024
-
Install #7459
-
Install #7565
-
Install #7566
Warranty:
- Limited Lifetime

















