ORI Chevrolet Silverado 1500 LTZ GVM

The ORI Silverado 1500 GVM Upgrade Package is a high-quality, federally approved enhancement engineered to increase the Gross Vehicle Mass (GVM) and payload capacity of the Chevrolet Silverado 1500 — including LTZ and ZR2 variants — without compromising ride quality or compliance.

Designed for Australian conditions and ADR compliance, this ORI GVM package is ideal for owners fitting heavy-duty accessories such as Boss Aluminium trays, canopies, service bodies, toolboxes and touring gear, where factory GVM limits can quickly be exceeded.

Note: The prices listed above do not include post-rego engineering fee or freight. Stage 4 and 5 packages require load-rated wheels and tyres, which are an additional cost.

Customer wanting to run zero offset wheel, will require additional flare coverage,

All stages are SSM federally approved and developed specifically for Australian conditions.

GVM Package Stages Explained

Stage 1 – 3650 kg GVM

Purpose: Entry-level payload increase and basic performance suspension.
Best For: Everyday touring, light gear, minimal travel setups.

Includes:

• Fox 2.5 Performance Series front coil-overs

• Fox 2.5 Performance Series rear shocks

• BDS upper control arms

• ORI 200 kg rear leaf packs

• Federally approved GVM & GCM increases
  Payload Increase: ~1,077 kg from stock (~757 kg)
  Lift: ~3.5″
  Wheel/Tyre: OEM wheels/tyres OK
  📌 Great starting point for modest touring builds.

Stage 2 – 3650 kg GVM

Purpose: Payload increase while retaining more of the factory ride.
Best For: ZR2 owners wanting to keep the factory multimatic suspension tuning.

Includes:

• Factory Multimatic suspension retained

• BDS upper control arms upgrade

• Peak Suspension leveling kit (approx 1.75″)

• ORI 200 kg leaf packs

• Federally approved GVM & GCM increases
  Payload Increase: ~1,087 kg
  Lift: ~2″
  Wheel/Tyre: OEM approved
  📌 Retains sportier factory ride while still gaining legal payload.

Stage 3 – 3850 kg GVM

Purpose: Mid-level payload + softer/adjustable performance.
Best For: Built touring setups with heavier gear.

Includes:

• Fox 2.5 Performance Elite coil-overs

• Fox 2.5 Performance Elite rear shocks

• BDS upper control arms

• ORI 200 kg leaf packs

• Federally approved GVM & GCM increases
  Payload Increase: ~1,272 kg
  Lift: 3.5″
  Wheel/Tyre: Load-rated wheels may be required
  📌 More suspension performance & payload lift — solid mid-range choice.

Stage 4 – 4250 kg GVM

Purpose: High payload upgrade with road & off-road capability.
Best For: Heavy touring, long-range gear, service body trays.

Includes:

• Fox 2.5 Performance Elite coil-overs

• Fox 2.5 Performance Elite rear shocks

• BDS upgraded control arms

• ORI 200 kg or 400 kg leaf packs

• Federally approved GVM & GCM increases

• Engineered for 35″ tyres
  Payload Increase: ~1,672 kg
  Lift: 3.5″
  Wheel/Tyre: Load-rated wheels & tyres required
  📌 Substantial payload for full gear builds and heavier camping/touring rigs.

Stage 5 – 4250 kg GVM (Premium)

Purpose: Top-end performance + maximum payload and rough terrain control.
Best For: Ultimate builds, off-road focused rigs with heavy load.

Includes:

• Fox 3.0 Bypass Race Series shocks (front & rear)

• BDS upper control arms

• ORI 200 kg or 400 kg leaf packs

• Federally approved GVM & GCM increases

• Engineered for 35″ tyres
  Payload Increase: ~1,672 kg
  Lift: 3.5″
  Wheel/Tyre: Load-rated wheels & tyres required
  📌 Most capable suspension and hardware for the highest demand builds.

For more information on the kit contact Sales@bossaluminium.com.au or visit ORI website https://www.offroadindustries.com.au/pages/chevrolet-silverado-1500-gvm-package