VT VX VY VZ Commodore Repair Manual
What to Look for Before You Buy Australia’s Modern Classic Commodores. The VT (1997–2000), VX (2000–2002), VY (2002–2004), and VZ (2004–2006) Holden Commodore series marked a major evolution for Holden. These models introduced all-new platforms, improved safety, stronger drivetrains, and some of the most desirable performance variants Holden ever built.
Whether you’re chasing a daily classic, weekend cruiser, or future investment, here’s exactly what to look for before buying.
1. Body & Rust Hotspots
While newer than earlier Commodores, these cars are now 20+ years old — rust and poor repairs are becoming common.
Key Areas to Inspect:
- Rear wheel arches and quarter panels
- Boot floor and spare wheel well
- Sills and jacking points
- Firewall seams and under battery tray
- Check for clear coat failure, especially on red, silver, and dark blue cars
Beware poorly repaired ex-taxi or fleet vehicles, especially early VT/VX models.
2. Engines & Drivetrain
Engine Options:
- 3.8L Ecotec V6 (VT–VY)
- 3.6L Alloytec V6 (VZ)
- 5.0L Holden V8 (VT)
- 5.7L LS1 V8 (VT–VZ)
- HSV variants (LS1, LS2, strokers in later VZ)
What to Watch For:
- Ecotec V6: Intake gasket leaks, worn timing chains, cooling issues
- Alloytec V6: Timing chain stretch, oil consumption V6 Timing Chain Kit
- LS1 V8: Piston slap (cold start), oil pressure issues, lifter noise
- Check for modifications done properly — many cars have cam, exhaust, or tune upgrades
3. Transmissions
Gearbox Options:
- 4-speed automatic (VT–VX)
- 5-speed auto (VY–VZ)
- T5 & T56 manual transmissions
Inspection Checklist:
- Smooth shifting, no flaring between gears
- No clunks on engagement
- Manual clutch bite point and synchro condition
- Transmission cooler upgrades on modified autos are a big plus
4. Suspension & Steering
These Commodores are heavy, and suspension wear is extremely common.
Known Issues:
- Worn control arm bushes
- Failing rear cradle bushes
- Sagging springs on high-mileage cars
- Steering rack leaks
VY & VZ benefited from suspension refinements but still suffer if neglected.
5. Brakes & Safety Systems
What to Check:
- Warped rotors (very common)
- ABS & traction control faults
- Worn calipers and brake lines
- VT introduced major safety upgrades, including airbags and traction control
6. Interior & Electronics
These cars are loaded with electronics — and age hasn’t been kind.
Common Issues:
- Sagging headliners
- Cracked dashboards
- Climate control failures
- Faulty power windows & central locking
- Dead pixels on digital displays (VY/VZ)
7. Electrical & ECU Issues
- Body Control Modules (BCM) can fail
- Alternators and starter motors wear
- Wiring issues from aftermarket stereos and alarms
- Check all warning lights turn on and off correctly
8. Model Variants & Collectability
Most Desirable Models:
- SS & SS-V
- Calais V8
- HSV Clubsport, GTS, Senator
- Manual V8 sedans & wagons
- Low-kilometre, unmodified examples
VT–VZ values are rising fast, especially clean LS-powered cars.
9. Documentation & History
- Verify VIN and engine numbers
- Look for service records and modification receipts
- Factory manuals, books, and HSV build plates add serious value
VT VX VY VZ Commodore Repair Manual