Tough Dog Isuzu D-MAX
Get up to an extra 600KG payload – Upgrade your GVM to 3450KG
On paper, the Isuzu D-MAX has a respectable payload, but this quickly reduces once passengers, fuel, luggage, and accessories are added.
Remaining under the Gross Vehicle Mass (GVM) while fully loaded can be challenging.
Tough Dog Suspension, as a recognised Second Stage Manufacturer (SSM), is authorised to develop and certify GVM upgrades that maximise your Isuzu D-MAX’s carrying capacity while keeping your vehicle road legal.
Each kit is extensively tested to ensure compliance with all applicable ADRs.
Federal approval for GVM upgrades requires rigorous testing to ensure your Isuzu D-MAX performs as well as, or better than, the original factory vehicle.
With a Tough Dog GVM upgrade, your D-MAX will retain safe braking and handling characteristics even when fully loaded. Testing requirements include:
- Finite Element Analysis (FEA) testing: Verifies axle strength and load capacity.
- Brake Testing: Includes laden, unladen, and partial system failure tests to comply with ADR35/00.
- ESC Testing: If required, ensures the electronic stability control system performs equal to or better than OEM standards.
The GVM is the maximum weight a vehicle can legally carry when fully loaded. Tough Dog GVM upgrades allow your Isuzu D-MAX to carry more weight without breaching ADRs or safety standards.
Certification depends on registration status:
- Federal Approval: For brand new vehicles not yet registered. A new compliance plate is fitted to the vehicle.
- State Approval: For registered vehicles, approval is achieved using Federal compliance data alongside inspection by an authorised state engineer.
- Choosing a selection results in a full page refresh.