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GVM upgrade

Isuzu D-Max (2021 on)

Tough Dog's GVM upgrade for the Isuzu D-Max (2021 on): a complete approved kit that lifts the legal weight your vehicle can carry. We fit it in Miami and complete the certification paperwork.

New GVM
3,695 kg
Original GVM
3,000 kg
Registration
Pre or post rego

Call or click for fitted price Fitting and certification are quoted for your vehicle.

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  • Opposite Lock network member, nationwide warranty
  • Fitted in our Miami workshop. We only fit parts we supply.
  • Zip and Afterpay

We text you a fitted price within one business day.

Options

Single and space cab kits

Minimum 400 kg payload; pre registration (federal) or post registration (state) (TDGVM-027 and 028 in the 2021 catalogue)

Crew cab kits

Minimum 300 kg payload; pre or post registration (TDGVM-029 and 030 in the 2021 catalogue)

Build

RG 08/2020 to 10/2021 (OEM CPA 50736), RG1 10/2021 to 04/2024 LS-M, LS-U, X-Terrain, RG1 2024 on LS-M, LS-U, X-Terrain, and SX 2024 on

Shocks

Foam Cell or TD-R Pro Series remote reservoir

Pre or post registration

Tough Dog Suspension is a recognised Second Stage Manufacturer (SSM). Unregistered vehicles get federal approval with an extra compliance plate; registered vehicles are certified using the federal compliance data plus an inspection by an authorised state engineer.

Ready to book it in? Tell us your vehicle and what you carry, and we text you a fitted price within one business day.

Get your fitted priceCall (07) 5572 1711

Front end

Front components

Foam Cell assembled front struts x2
Foam Cell assembled front struts x2Foam Cell front strut supplied fully assembled with the Tough Dog coil, so it bolts straight in (twin tube with a.

Rear end

Rear components

Foam Cell rear shocks x2
Foam Cell rear shocks x2Foam Cell shock (twin tube with a micro-cellular foam insert that fights shock fade, 18mm double chrome-plated rod).
Rear leaf springs x2
Rear leaf springs x2Progressive rate leaf pack, military wrap.
Rear U-bolts x2
Rear U-bolts x2New high tensile U-bolts.
Rear leaf spring bush kit x1
Rear leaf spring bush kit x1Urethane spring and shackle bushes, tougher and longer lasting than rubber.
Greasable rear shackle set x1
Greasable rear shackle set x1Greasable shackles let you push grease through the joint and flush out dirt, protecting the bushes.
Greasable rear pin set x1
Greasable rear pin set x1Greasable spring pins that keep dust and salt out of the bushes.

Specifications

Original GVM3,000 kg (from, per Tough Dog; 2021 catalogue lists 3,000 kg 4x2 and 3,100 kg 4x4)
New GVM3,695 kg
Front axle1,595 kg (revised max front axle load, 2021 catalogue)
Rear axle2,100 kg (revised max rear axle load, 2021 catalogue)
Registrationboth (pre registration federal approval with compliance plate, or post registration with state engineer sign off)
ApprovalIPA approval number 51585 (2021 catalogue)
Extra payloadup to 595 kg extra payload
FitsIsuzu D-Max RG 2021 on; single, space and crew cab 4x4 and 4x2 Hi-Rider (2021 catalogue)
GVM web strip imagetough-dog-gvm-upgrades-newimages-dmax.jpg

Warranty

Tough Dog warranty

GVM Upgrades: 4 year/unlimited km (recreational), 3 year/unlimited km (commercial). Warranty exclusion 12: "Parts fitted to vehicles weighing more than original GVM or the revised GVM specified by a Tough Dog GVM upgrade."

Fitted by us in Miami and backed by the Opposite Lock network nationwide.

Fitted and certified in Miami

We fit and certify it on site

We fit Tough Dog GVM upgrades at our Miami workshop and complete the certification on site, so you drive away with the paperwork done.

An approved GVM kit has to be fitted complete, under its own kit part number, to be certified. We fit every part in the approved kit for your exact vehicle, and nothing is swapped or left out.

How GVM upgrades work, pre and post registration

Ready to book it in? Tell us your vehicle and what you carry, and we text you a fitted price within one business day.

Get your fitted priceCall (07) 5572 1711

Video

Do you need a Tough Dog GVM upgrade?
Warning: your 4WD could be under GVM and still be illegal (Short)
How quickly your 4WD can creep past its factory GVM (Short)

Ready to book it in? Tell us your vehicle and what you carry, and we text you a fitted price within one business day.

Get your fitted priceCall (07) 5572 1711

Prices are the supplier's recommended retail price for the part, plus fitment by our technicians, excluding freight. Freight is charged where stock is shipped to us for your job. Every part is fitted in our Miami workshop and covered by the maker's warranty plus our workmanship guarantee. Prices checked 21 October 2026.

Ready to build yours?

Free quotes, honest advice and expert fitment in Miami.

Get a free quote(07) 5572 1711
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