A GVM upgrade can transform your four wheel drive or work ute, giving it the strength and compliance to safely handle added weight from tools, accessories, towing gear, or off-grid setups.
But it’s not as simple as swapping out your suspension, it’s a legal vehicle modification that needs to be done properly.
If installed incorrectly or without certification, a GVM upgrade can void your insurance, cause registration issues, and most importantly, compromise your safety. That’s why choosing the right installer is critical.
In this guide, we’ll walk you through what to look for in a licensed, reputable, and experienced GVM upgrade installer, so you can hit the road with confidence, knowing your setup is safe, compliant, and built to last.
What is a Licensed Vehicle Modifier (LVM)?
A Licensed Vehicle Modifier (LVM) is an individual or business authorised by a state or territory transport authority, such as WA’s Department of Transport, to inspect, carry out, and certify structural vehicle modifications.
Only a licensed and accredited LVM, like DAPCO Bunbury, can legally perform and sign off on a GVM upgrade in Western Australia. This ensures that all work complies with Australian Design Rules (ADRs) and Vehicle Standards Bulletin 6 (VSB6), meeting the highest standards of safety and compliance.
An LVM is responsible for:
- Inspecting and assessing vehicle modifications for safety and compliance
- Installing or certifying upgrades such as suspension changes, chassis modifications, and GVM increases
- Issuing engineering certificates or compliance reports
- Affixing a modification plate to the vehicle (typically in the engine bay or door jamb) to document the legal upgrade
Attempting a GVM upgrade without a licensed modifier, or working with someone who isn’t certified, means the upgrade is not legally recognised. This can lead to registration issues, insurance voidance, and serious safety risks.
At DAPCO Bunbury, Eddy Gobby is licensed as a Second Stage Manufacturer, meaning we can legally increase the load carrying capacity of eligible vehicles and issue all required certification.
Pre-Registration vs Post-Registration GVM Upgrades
A post-registration GVM upgrade is the most common option for vehicle owners. These upgrades are carried out after the vehicle has been registered and must be certified at the state level by a LVM. This process is ideal for those who have already purchased and registered their vehicle but now need to legally increase its carrying capacity due to added accessories or heavier loads.
In contrast, an SSM (Second Stage Manufacturing) GVM upgrade is performed before the vehicle is first registered, typically through the dealership or an authorised modifier. This pathway is often chosen by buyers who plan to add gear like a rooftop tent, bull bar, or towing setup from the start. By upgrading pre-rego, you can save time, reduce costs, and ensure that your GVM is compliant from day one, with full certification already included in the registration process.
This matters because factory GVM limits don’t always accommodate the real-world demands of touring, trade, or towing setups. Planning ahead with an SSM upgrade can help you avoid future rework and compliance issues, but if your vehicle is already registered, a certified post-rego GVM upgrade is the next best solution.
Check Their Track Record with Your Make & Model
Not all vehicles are the same, and neither are GVM upgrades. When comparing installers, it’s important to check whether they’ve worked on popular vehicle models or have direct experience with your specific make. Each manufacturer has different suspension setups, electronics, and load-bearing limits, so working with an installer familiar with your vehicle reduces the risk of errors and ensures a smoother certification process.
Look for evidence of past work, such as:
- Case studies or project gallery featuring your vehicle type
- Photos or videos of similar GVM upgrades
- Customer reviews or testimonials mentioning your model
An installer with a proven track record is more likely to understand the nuances of your vehicle and provide a reliable, legally compliant result. Don’t be afraid to ask directly: “Have you done a GVM upgrade on a [Your Vehicle Model] before?” a reputable installer will be happy to share their experience.
Look for Transparency Around Pricing and Process
A reputable GVM upgrade installer will provide a clear, detailed, and tailored quote based on your specific vehicle make, model, and setup requirements.
They should also take the time to explain realistic timeframes for completing the upgrade and certification, such as:
- What the certification process involves
- Next steps for updating your vehicle registration and notifying your insurer
Avoid installers who are vague or downplay the legal requirements involved. Transparency builds trust and ensures you understand exactly what you’re paying for and why.
Ensure They Use Quality, Compliant Kits
When it comes to GVM upgrades, the right suspension kit is the foundation of a safe and legal GVM upgrade. To ensure your vehicle remains safe, compliant, and reliable under load, it’s essential to choose an installer who uses engineered, pre-approved kits from trusted brands.
Look for installers who work with well-established names like Pedders. These kits are purpose-built for GVM upgrades and come with full engineering documentation to meet compliance requirements.
A compliant GVM upgrade kit should be:
- Pre-engineered and specific to your vehicle make/model
- Tested for braking performance, ESC compatibility, and axle load capacity
- Certified to meet ADR and VSB6 standards
- Installed to maintain the safety, handling, and performance of your vehicle
Choosing a reputable installer who uses high-quality, certified components gives you peace of mind that your upgrade is legal, safe, and built to handle real-world demands.
At DAPCO Bunbury, we use Pedders GVM upgrade kits, trusted across Australia for their quality, durability, and performance.
Understand the Paperwork You’ll Receive (and Need)
After your GVM upgrade has been completed and certified, your installer should provide you with the essential documentation to prove your vehicle is legally compliant.
This includes:
- Modification plate securely affixed to your vehicle (commonly in the engine bay or door jamb), showing the new GVM rating. This plate is essential for legally documenting the re-rating.
- Engineering certificate or compliance report
- Weighbridge ticket, where required, to validate your vehicle’s new weight and ensure it doesn’t exceed legal limits.
- DoT application forms or online lodgement confirmation for updating your vehicle’s registration with the WA Department of Transport
- Documentation for your insurer, since you’re legally required to notify them of any GVM change to maintain your coverage.
A reputable WA installer will not only provide all the necessary paperwork but also guide you through the DoT process, and ensuring your rego is updated seamlessly and correctly.
Post-Installation Support
A GVM upgrade doesn’t end when the new suspension is fitted, and a good installer knows that. When comparing GVM installers, look for one that offers genuine post-installation support, not just a one-off service.
The right installer should:
- Help you with re-registering your vehicle through the WA Department of Transport
- Provide guidance on notifying your insurer of the upgrade
- Offer practical advice on weight distribution, load settling, and how to get the best performance from your setup.
At DAPCO Bunbury, we’ve been trusted by WA locals for almost 50 years. We don’t just install and send you on your way, we’re here to provide ongoing advice, support, and expert knowledge, so you can enjoy the road ahead with peace of mind, knowing your vehicle is safe, compliant, and ready for the load.
Warranty, Insurance, and Legal Considerations
A common question is whether a GVM upgrade will void your manufacturer’s warranty. Because each vehicle brand has different policies, it’s best to check directly with your manufacturer or dealer to fully understand any potential impacts.
It’s also essential to notify your insurance provider, as failing to disclose a GVM upgrade could result in denied claims or a voided policy.
Beyond compliance, it’s worth understanding how a GVM upgrade may affect your vehicle’s ride quality and fuel economy, especially when driving unloaded or with a new suspension setup. Our Comprehensive Guide to GVM Upgrades in WA and our GVM upgrade FAQs covers everything you need to know to stay informed. The more you understand upfront, the more confident you’ll be when navigating decisions around insurance, registration, and your vehicle’s long-term performance.
GVM vs GCM: What’s the Difference and Why It Matters
Another common misconception is that upgrading your GVM will automatically increase your GCM (Gross Combination Mass) or towing capacity, but that’s not the case.
Your GVM refers to the maximum legal weight of your vehicle on its own, fully loaded with passengers, fuel, tools, and accessories. Whereas a GCM is the total allowable weight of the vehicle plus any trailer or caravan being towed.
A GVM upgrade increases your vehicle’s payload capacity but does not automatically raise your GCM or towing limits. If you’re looking to tow heavier loads, you’ll need to discuss a GCM upgrade specifically, which is a separate certification process and not available for all vehicles.
Before getting a GVM upgrade, be clear to your installer about why you need it, whether it’s for towing, carrying more tools, or fitting out your touring setup, so they can guide you toward the right solution and ensure you’re legally covered from all angles.
Looking for a GVM Upgrade You Can Trust?
A GVM upgrade is more than a suspension change, it’s a legal and safety decision. Make sure you choose an installer who’s certified, experienced, and has your back.
Got questions about your setup? Contact the team at DAPCO Bunbury for expert advice and support.
