TSA GVM Upgrade Package – Chevrolet Silverado 1500 (4.49 T GVM | APEX 2.5 Remote Res Adjustable | +400 / +600 KG | Axle Upgrade | SSM Approved)

TSA Chevrolet Silverado 1500 GVM Upgrade – 4.49 T GVM (APEX 2.5 Adjustable Remote Reservoir | +400 KG / +600 KG | Full Axle Upgrade | SSM Approved)

Experience the ultimate in load capacity, durability, and compliance with the TSA 4.49 T GVM Upgrade Package for the Chevrolet Silverado 1500. Engineered for serious touring, towing, and heavy-duty applications, this federally approved pre-registration upgrade delivers exceptional suspension control and axle strength through a complete APEX and EFS suspension system — combined with full differential modifications and axle upgrades.

This package raises your Gross Vehicle Mass (GVM) to 4,490 KG, allowing for up to 600 KG constant load capacity, while retaining the Silverado’s maximum 4.5 T braked towing capacity. The upgrade results in a combined mass of up to 8,990 KG (LTZ) or 8,690 KG (ZR2), making it one of the most capable half-ton GVM upgrades available in Australia.

Inclusions:

• APEX 2.5 Adjustable Remote Reservoir Coilovers (Front) – fully adjustable for compression and rebound, offering unmatched ride quality and control under load

• APEX 2.5 Adjustable Remote Reservoir Shocks (Rear) – remote-reservoir design for superior heat dissipation and performance in demanding conditions

• Upgraded Upper Control Arms – correct geometry and alignment for improved stability and handling

• EFS 400 KG / 600 KG Constant Load Leaf Packs – heavy-duty leaf options tuned for sustained load and touring builds

• EFS Leaf Pack Bush Kit – complete hardware package for compliance and durability

• EFS Extended U-Bolts – designed for increased rear axle load capacity

• APEX Axle Upgrade – includes full differential modifications and full-floating axle conversion for superior strength and reliability

• SSM Federal Engineering and Compliance Certification – pre-registration certification included

Requirements & Specifications:

• Tyre Approval: 35 × 12.5 R18 with minimum 1,350 KG load rating

• Front Axle Rating: increased to 1,850 KG

• Rear Axle Rating: increased to 2,700 KG

• Category Change: MC → NB1

• Load-Rated Wheels & Tyres Required

• Price: $27,960 AUD – includes product, installation, and federal compliance (inc. GST, excl. freight)

• Post-Registration Engineering: Additional fee applies (data updates required for certification)

The TSA 4.49 T GVM Upgrade represents the top tier of strength and compliance for Silverado 1500 owners — combining federal approval, axle reinforcement, and premium adjustable APEX suspension to create a true heavy-duty performer capable of handling any load, on or off-road.

Everyday Offroad and TSA deliver engineered, certified, and federally approved GVM solutions for Chevrolet Silverado 1500 LTZ and ZR2 models — designed, tested, and built for Australian conditions.