Parts for your 2013 Holden Commodore-Fuel cap

2013 Holden Commodore fuel cap — what it does and how to look after it

Referencing Holden’s own technical sources, the 2013 Holden Commodore does use a conventional fuel cap. The VE Series II and VF Owner’s Handbooks (2013) specify tightening the tethered, screw-type cap until it clicks after refuelling, and GM Service Information for the Commodore’s EVAP system explains that a sealed cap is required for vapour control. A capless system isn’t used on this model.

On a 2013 Commodore, the fuel cap’s job is simple but critical. It seals the tank so petrol vapour doesn’t escape, keeps dust and water out, and lets the EVAP system do its thing to reduce emissions. If the cap isn’t sealing properly, the car can waft a fuel smell, throw an emissions fault, or even light the check engine lamp with EVAP codes. That’s why Holden tells drivers to twist the cap until it clicks a few times — that ratchet action is the go-to sign it’s tight without being overdone.

As part of routine servicing, it pays to give the cap a quick once-over. Check the rubber seal for cracks, flattening or nicks. Make sure the tether is intact and the ratchet still clicks smoothly. Wipe any grit off the filler neck so the seal has a clean surface to mate against. There’s no need to lubricate the seal, if it’s dry or damaged, replacement is the smarter move. When refitting after a fill, turn it until those audible clicks are heard.

Replacement is straightforward and tool-free. Choose a genuine or quality aftermarket cap that’s built for the VE Series II or VF Commodore, so the pressure/vacuum relief and thread profile match the factory spec. Avoid “universal” caps that don’t state Commodore compatibility. If the vehicle is an LPG model, note the LPG filler uses a different cap to the petrol tank.

Typical signs it’s time to replace the cap include a persistent fuel smell around the rear quarter, difficulty getting the cap to click, visible cracking on the seal, or an EVAP-related warning that persists after re-tightening. Many owners pre-emptively replace the cap around the 5–7 year mark, especially if the car lives in hot, dusty conditions. It’s a low-cost part that helps the Commodore run cleanly and keeps the cabin and garage free of petrol pong.

• Tighten until it clicks after every refuel
• Inspect the rubber seal and tether at each service
• Clean the filler neck seating surface
• Replace the cap if seals are worn or EVAP faults keep returning

FAQs

Does the 2013 Holden Commodore use a capless refuelling system?
No. Both the late VE Series II and the VF (launched 2013) use a tethered, screw-on fuel cap that must be tightened until it clicks. Capless systems weren’t fitted to these models.

Why did the check engine light come on after refuelling?
A loose or damaged fuel cap can trigger EVAP system faults after a fill. Refit the cap and turn it until it clicks several times, then drive a few trips to let the system re-test. If the light stays on, inspect the cap’s seal and consider replacing it before chasing more complex EVAP leaks.

Are VE Series II and VF 2013 fuel caps interchangeable?
In most petrol variants they are functionally the same style of cap, but it’s best to match by VIN or model code to ensure the thread and valve spec are correct. LPG models use a different filler cap for the LPG point.