ReadyLIFT 4” Big Lift Kit – Chevy Silverado Trail Boss / GMC Sierra AT4 1500 (2019–2024)

The ReadyLIFT 4” Big Lift Kit is developed specifically for the Chevrolet Silverado Trail Boss and GMC Sierra AT4 1500 (2019–2024).

The kit is built with a focus on comfort, stability and durability, using heavy-duty components and precise geometry to deliver even better behaviour than the factory suspension.

The system allows tyres up to 35” to be fitted and provides an excellent balance between everyday use and off-road capability.

⭐ Key Features

• Lift: 4” (≈10 cm)

• Suitable for tyres up to 35”

• Improved ride over factory

• Excellent stability and control

• ReadyGuard warranty included

🔧 Equipment

• Front and rear crossmembers (crossmembers) – reinforced steel

• Front skid plate (skid plate) – 3/16” steel

• Differential brackets (diff drop brackets) – reinforced

• Upper strut extensions (strut extensions)

• Lower preload spacers (pre-load spacers)

• Rear blocks (rear lift blocks)

• Shock extensions (shock extensions)

🔗 Compatibility

• Chevy Silverado 1500 Trail Boss (2019–2024)

• GMC Sierra 1500 AT4 (2019–2024)

• 4WD only

• Petrol models only

📦 What’s in the Box

• Complete lift kit

• Crossmembers and brackets

• Rear blocks and hardware

• All mounting components

📊 Technical Specifications

• Type: lift kit (big lift kit)

• Lift: 4”

• Max. tyres: up to 35×12.50

• Wheels:

  • Recommended: 20×9 / 0 offset

  • With trimming: down to -18 offset

• Suspension: strut spacer + blocks

⚙️ Benefits

• Improves handling and comfort

• Retains correct suspension geometry

• Reduces component wear

• Provides greater ground clearance

• Suitable for off-road and daily use

⚠️ Important

• Not compatible with:

  • diesel versions

  • rear mono-leaf springs

• Use of Auto 4 Hi mode is not recommended

• Not suitable for 18” wheels

• Single Cab is not validated

• 2025 models may require:

  • U-bolt kit (PN: 67-35150UB)