MaxTrac 900250 Silverado Sierra 1500 5" Rear Lift Box Kit

Complete the Rear of a MaxTrac 7"–8" Front Lift System

Finish the rear suspension setup on your compatible 2025–2026 Chevrolet Silverado 1500 or GMC Sierra 1500 2WD/4WD with the MaxTrac 900250 Rear Lift Box Kit. Designed as Box 5 of 5 for the corresponding high-lift system, this package provides 5 inches of rear lift and includes 5" lift blocks, U-bolts, and brake line brackets.
The 900250 is intended to work as part of a MaxTrac GM 1500 7"–10" lift system, with this 5" rear box matched to the 7"–8" front lift configuration. It is a component box rather than a complete standalone suspension lift kit.

Key Features

5" Rear Lift

Includes 5-inch rear lift blocks to establish the rear ride height required for the corresponding 7"–8" front lift configuration.

Box 5 of 5

Designed as the fifth component box of the corresponding multi-box MaxTrac GM 1500 high-lift suspension system.

Rear U-Bolts Included

Supplied U-bolts secure the rear axle, lift blocks, and leaf-spring assembly after installation.

Brake Line Brackets Included

Includes brake line relocation brackets to accommodate the increased rear suspension height.

2WD & 4WD Application

Designed for compatible 2025–2026 Silverado and Sierra 1500 2WD/4WD applications using the appropriate MaxTrac lift system.

High-Lift System Component

Engineered to work in conjunction with MaxTrac's 2019+ GM 1500 7"–10" lift system, rather than functioning as a complete lift kit by itself.

What's Included

5" rear lift blocks
Rear U-bolts
Brake line brackets
Installation hardware as supplied by MaxTrac

Vehicle Fitment

Fits

2025–2026 Chevrolet Silverado 1500 2WD
2025–2026 Chevrolet Silverado 1500 4WD
2025–2026 GMC Sierra 1500 2WD
2025–2026 GMC Sierra 1500 4WD
Compatible MaxTrac 7"–8" front lift configurations

Does Not Fit

Models equipped with a monoleaf rear spring
Models equipped with Adaptive Ride Control

Important Notes

Box 5 of 5 for the corresponding MaxTrac high-lift suspension system.
5" rear lift box is intended for the 7"–8" front lift configuration.
Designed to work in conjunction with the applicable 2019+ GM 1500 MaxTrac 7"–10" lift system.
Does not fit models equipped with a monoleaf rear spring.
Does not fit models equipped with Adaptive Ride Control.
This component box does not contain all parts required for a complete 7"–8" suspension lift. The remaining applicable MaxTrac lift-system boxes/components are required.
Rear shocks are not listed as included with part number 900250.
MaxTrac does not recommend wheels wider than 9" or wheels with less than 4.5" backspacing. Using wheels outside these recommendations will void applicable manufacturer warranties.

Product Specifications

Brand: MaxTrac Suspension
Part Number: 900250
UPC: 706199417284
Tariff: 8708.80.1600
Kit Type: Lift / Level
Product Type: Rear Lift Box Kit
Box Number: 5 of 5
Position: Rear
Rear Lift: 5"
Front Lift Configuration: 7"–8"
Lift System Range: 7"–10"
Drivetrain: 2WD / 4WD
Rear Lift Blocks: 5"
Rear U-Bolts: Included
Brake Line Brackets: Included
Rear Shocks: Not Listed / Not Included
Adaptive Ride Control: Not Compatible
Monoleaf Rear Spring: Not Compatible
Material: Steel
Color: Grey
Finish: Grey Powder Coat
Sold As: Each
Weight: 25 lbs
Dimensions: 15" × 8" × 6"
Multiple Box Item: No
Origin Criterion: B
Unit of Measure: IN
Country of Origin: China

Why Choose MaxTrac 900250?

The MaxTrac 900250 provides the rear hardware required when completing the appropriate 7"–8" front lift configuration within MaxTrac's multi-box GM 1500 high-lift system. Its 5" blocks and matching U-bolts establish the required rear height, while the included brake line brackets address brake-line positioning with the taller suspension.
Because it is specifically designed as Box 5 of 5, the 900250 is especially useful when assembling, servicing, or replacing the rear component box of an existing compatible MaxTrac lift system.

Perfect For

7"–8" Silverado 1500 lift builds
Sierra 1500 high-lift systems
5" rear suspension lift setups
MaxTrac multi-box kit replacements
2WD and 4WD GM 1500 projects
Rear block and U-bolt upgrades