Carry More. Stay Legal. Tow Hard.
Increase your legal payload to up to 4,200kg GVM with fully engineered, compliance-ready upgrades using Fox 2.5" Remote Res Shocks & BDS Suspension UCAs. Pre-registration federally approved.
Factory GVM
Was Never
Enough.
Load up a canopy, tools, drawers, rooftop gear or hook up a trailer — and suddenly you're overweight, unsafe, and technically illegal.
We build fully engineered GVM upgrade packages designed to increase your legal payload without compromising safety, handling, or compliance. Every upgrade comes with extensive testing and complete compliance paperwork.
- ✕Over GVM — every trip is technically illegal
- ✕Unsafe under braking with a full load
- ✕At risk of insurance void in an accident
- ✕Non-Compliant for ATO Deduction
- ✕Factory towing limits become your ceiling
Pick Your
Upgrade
Pre & Post Rego approved options. All prices include SSM Federal Engineering and installation. Freight not included.
- ✓Front Fox Performance Series 2.5" Coilover Shocks
- ✓Rear Fox Performance Series 2.5" Shocks
- ✓BDS Suspension Upper Control Arms
- ✓AMTRUX 2" Lifted Rear Leaf Pack, 0–200kg
- ✓SSM Federal Engineering
- ✓Installation
Designed for daily driving and touring, enhanced ride comfort, improved control and ATO-compliant payload.
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- ✓Front Fox Performance Elite Series 2.5" Coilover Remote Reservoir DSC Shocks
- ✓Rear Fox Performance Elite Series 2.5" Remote Reservoir DSC Shocks
- ✓BDS Suspension Upper Control Arms
- ✓AMTRUX 2" Lifted Rear Leaf Pack, 0–200kg
- ✓SSM Federal Engineering
- ✓Installation
Ideal for loaded touring builds needing extra payload capacity and full tax-compliant compliance.
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- ✓Front Fox Performance Elite Series 2.5" Coilover Remote Reservoir DSC Shocks
- ✓Rear Fox Performance Elite Series 2.5" Remote Reservoir DSC Shocks
- ✓BDS Suspension Upper Control Arms
- ✓AMTRUX 2" Lifted Rear Leaf Pack, 200kg or 400kg
- ✓SSM Federal Engineering
- ✓Installation
Built for serious touring and towing setups with maximum payload capacity and full tax-compliant compliance.
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- ✓Zone Offroad 1.75" Lift Kit w/ UCA
- ✓AMTRUX Rear Lift Pack, 0–200kg
- ✓SSM Federal Engineering
- ✓Installation
Entry-level GVM compliance for the ZR2 — keep the factory Multimatic DSSV dampers and add legal payload capacity.
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- ✓Front Fox Performance Elite Series 2.5" Coilover Remote Reservoir DSC Shocks
- ✓Rear Fox Performance Elite Series 2.5" Remote Reservoir DSC Shocks
- ✓BDS Suspension Upper Control Arms
- ✓AMTRUX 2" Lifted Rear Leaf Pack, 0–200kg
- ✓SSM Federal Engineering
- ✓Installation
Full Fox remote res upgrade for the ZR2 — serious payload compliance with touring-grade damping.
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- ✓Front Fox Performance Elite Series 2.5" Coilover Remote Reservoir DSC Shocks
- ✓Rear Fox Performance Elite Series 2.5" Remote Reservoir DSC Shocks
- ✓BDS Suspension Upper Control Arms
- ✓AMTRUX HD Rear Lift Pack, 200kg or 400kg
- ✓SSM Federal Engineering
- ✓Installation
Maximum ZR2 payload with heavy-duty leaf pack — built for tray, canopy and serious work setups.
Enquire NowWhich GVM Is
Right For You?
Your GVM target depends on your build. Here's what we recommend based on how you run your Silverado.
Built With The
Best Components
Every America's Garage GVM Upgrade package uses premium, proven components — not budget alternatives.
Fox 2.5" Remote Res Shocks
Industry-leading remote reservoir shocks delivering superior heat management, consistent damping and genuine off-road performance. Front & rear, 2–3" lift.
BDS Upper Control Arms
Heavy-duty forged UCAs engineered specifically for lifted Silverado applications — correcting caster and protecting CV joints at increased ride heights.
AMTRUX Lifted Rear Leaf Pack
Australian-engineered rear leaf packs offering 0–200kg or 0–400kg capacities depending on your chosen GVM tier. Precision-rated for compliance.
SSM Federal Engineering
Full compliance engineering certification from SSM — accepted nationally for pre and post rego approval. Every upgrade comes with complete paperwork.
GVM Upgrade
Comparison
Chevrolet Silverado 1500 — Factory vs Upgrade Options
| Details | Factory | 3.65T LTZ | 3.65T ZR2 | 3.85T | 4.2T |
|---|---|---|---|---|---|
| Lift Height | — | 2" | 2" | 2" | 2" |
| GVM | 3,300kg | 3,650kg | 3,650kg | 3,850kg | 4,200kg |
| Payload | 757kg | 1,107kg | 1,067kg | 1,294kg | 1,602kg |
| GCM | 7,800kg | 8,150kg | 7,850kg |
8,350kg
LTZ
8,050kg
ZR2
|
8,700kg
LTZ
8,400kg
ZR2
|
| Braked Towing Capacity Pre-Rego |
4,500kg | 4,500kg | 4,200kg |
4,500kg
LTZ
4,200kg
ZR2
|
4,500kg
LTZ
4,200kg
ZR2
|
| Front Axle | 1,724kg | 1,724kg | 1,724kg | 1,724kg | 1,724kg |
| Rear Axle | 1,724kg | 1,926kg | 1,926kg | 2,126kg | 2,480kg |
| Wheel & Tyre | |||||
| Wheel Load Rating | — | — | — | — | 1,240kg min. |
| Tyre Load Rating | — | — | — | — | 1,240kg min. |
| Requires Wheel/Tyre Upgrade | ✕ | ✕ | ✕ | ✕ | ✓ |
| Max. Tyre Size |
|
275/60R20 | 275/60R20 | Pre Rego275/60R20 Post Rego State dependent | Pre Rego 35x12.5R18 max. |
| Package Inclusions | |||||
| Shocks | — | Fox 2.5" Monotube | — | Fox 2.5" R/R | Fox 2.5" R/R |
| Part Number | — | AG801001-36N1 | AG801002-36F1-10 | AG801002-38F2-10 |
AG801002-42F2-10 (200kg Leaf) AG801002-42F2-20 (400kg Leaf) |
Not Just Another
GVM Program
Knocked Out of the Park
We weren’t first to market. That was deliberate. We wanted to build the strongest GVM program possible, with better options, better products, and multiple pricing tiers to suit different builds and budgets.
Vetted Installers Only
Not every workshop touches our program. Every installer in our network has been personally vetted by us to ensure proper workmanship, proper process, and proper outcomes.
Full Engineering Papers
Every upgrade is backed by SSM Federal Engineering and complete compliance documentation, accepted nationally. Pre-rego and post-rego options available across Australia.
Best Support in the Game
Our GVM experts work through your exact build, usage, state requirements and budget to help you choose the right upgrade before a single bolt gets turned.
GVM Upgrade
Frequently Asked Questions
Everything you need to know before you upgrade your Silverado 1500.
The factory GVM simply wasn't set with serious Australian touring and towing in mind. That's why a properly engineered GVM upgrade is so important for anyone using their Silverado the way it was built to be used.
Our goal is to offer a more complete and confidence-inspiring upgrade pathway, backed by stronger supporting information and a clearer compliance position — so you're covered no matter your state or use case.
GCM stands for Gross Combination Mass and refers to the maximum legal weight of the vehicle and trailer combined.
In simple terms, GVM is about how much weight the vehicle can carry on its own wheels, while GCM is about how much total weight the vehicle and trailer can handle together.
This is where many people get caught out. There is a big difference between a vehicle that has upgraded suspension and a vehicle that has a properly approved and certified GVM upgrade. The America's Garage Silverado 1500 upgrade comes with full SSM Federal Engineering certification — accepted nationally.
The best way to protect yourself is to use a properly supported GVM upgrade program and keep all paperwork. The America's Garage Silverado 1500 upgrade comes with complete SSM Federal Engineering documentation — giving you a strong compliance position with any insurer or dealer.
Ready to Sort
Your Chev 1500?
Talk to one of our GVM experts. We'll recommend the right package for your Chev 1500 build, your state, and your budget.
Our GVM experts are ready to help — Mon–Fri, 8am–5pm AEST