VT VX VY VZ Commodore Repair Manual
The VZ Commodore, produced from 2004 to 2006, marked the final iteration of the third-generation Holden Commodore. With refined styling, updated Alloytec engines, and improved electronics, restoring a VZ Commodore requires a thorough checklist covering engine, transmission, suspension, brakes, body panels, interior, electrical systems, and wheels.
Engine & Transmission
Engine Options:
- 3.6L Alloytec V6 – base engine
- 5.7L LS1 V8 (HSV variants)
Engine Restoration Checklist:
- Engine rebuild kits
- Fuel injection components, intake manifolds
- Radiators, hoses, and water pumps
- Engine mounts & vibration isolators
- Oil pumps, timing chains, filters, and seals
Transmission & Driveline:
- 4-speed automatic (4L60E) or 5-speed manual (depending on variant)
- Transmission rebuild kits
- Clutch kits & pressure plates
- Drive shafts & U-joints
- Differential rebuild kits & seals
Suspension & Steering
The VZ offered improved ride quality and handling, retaining independent front suspension and semi-trailing rear arms.
Checklist:
- Front struts, coil springs & shock absorbers
- Rear semi-trailing arm bushings & shocks
- Control arm bushings & ball joints
- Steering rack/box rebuild kits
- Tie rods & idler arms
Brakes
VZ Commodores came with ABS, traction control, and enhanced brake systems.
Checklist:
- Front and rear disc brake rebuild kits
- Brake pads, rotors & hoses
- Master cylinder & brake booster
- ABS sensors & modules
- Brake fluid & maintenance kits
Body & Exterior Panels
VZ Commodores can suffer from minor rust and wear on older vehicles.
Checklist:
- Rust repair panels: sills, floors, rear quarters
- Bonnet, guards, boot panels
- Headlights & tail light assemblies
- Door handles, mirrors & badges
- Weather seals & windscreen seals
Interior Restoration
VZ interiors featured upgraded leather, modern dashboards, and updated trim.
Checklist:
- Seat covers & foam kits
- Door trims & panels
- Dash pad & instrument cluster refurbishments
- Carpets & mats
- Steering wheel restoration or replacement
Electrical System
VZ Commodore introduced enhanced ECU and electrical systems.
Checklist:
- Full wiring loom replacement
- Alternator & starter motor
- Headlights & tail lights
- Switches, relays, fuses
- ECU updates or replacement
- Optional upgrades: modern radios, LED lighting
Wheels & Tyres
- Original steel wheels & hubcaps
- Alloy wheel options
- Period-correct tyre recommendations
- Hubcaps & centre caps
VT VX VY VZ Commodore Repair Manual