Parts for your 2000 Holden Commodore-Ignition coils

2000 Holden Commodore ignition coils — what they do and how to look after them

Ignition coils are absolutely relevant on the 2000 Holden Commodore. Technical documentation for these models confirms it: the VT Series II and early VX with the 3.8‑litre Ecotec V6 (L36/L67) use a distributor‑less system with a three‑unit coil pack mounted on an ignition control module, while the Gen III 5.7‑litre LS1 V8 uses an individual coil for each cylinder (coil‑near‑plug). Sources: Holden VT/VX Service Manual (Engine Controls), GM Powertrain 3800 Series II Ignition System overview, and GM/Delphi LS1 service literature.

On this Commodore, the coils step up battery voltage to the big spark needed to fire the plugs under load. In the V6, each of the three coils drives a pair of cylinders in a waste‑spark arrangement, on the LS1 V8, each cylinder gets its own dedicated coil for crisp, reliable ignition. When coils get tired, drivers often notice hard starts, a lumpy idle, hesitation under throttle, or the check engine light and misfire codes.

Coils aren’t a routine “every X kilometres” service item, but they should be inspected during regular servicing. A technician will look for cracking, carbon tracking, green/white corrosion on terminals, heat damage, or swollen housings. On the V6, it’s worth checking the ignition module beneath the coil pack as heat and moisture can affect both. For the LS1, cracked boots or loose connectors at the rocker covers are common gotchas.

• Replace coils when there are clear misfire faults, visible damage, or poor test results (follow the workshop manual specs for resistance and signal tests).
• Always rule out simple causes first: old spark plugs, tired leads (V6), poor engine earths, or injector faults.
• Use quality OE‑equivalent parts. Mixing coil types or cheap copies can create new misfires.
• If one V6 coil fails, consider testing and, if necessary, replacing the set and the module to maintain balance. On LS1, replace only the faulty unit unless others test weak.
• Keep the area dry and clean. After washing the engine bay, avoid soaking the coil pack/module (V6) or coil connectors (V8).

Typical workshop time is modest: the V6 coil pack sits upfront for straightforward access, while the LS1 coils are mounted along the rocker covers. A fresh set of plugs (and leads on the V6) paired with healthy coils usually restores smooth running, better fuel economy, and easier starts—just what a well‑kept Commodore should deliver.

Popular questions about 2000 Holden Commodore ignition coils

Does a 2000 Commodore have a distributor or ignition coils?
It uses coils. The V6 runs a three‑coil pack on a distributor‑less ignition system, and the LS1 V8 runs one coil per cylinder. There’s no traditional distributor on either setup.

What are common symptoms of a failing coil on these models?
Misfires under load, rough idle, harder cold starts, increased fuel use, and a flashing or steady check engine light are typical. Scan tools often show P0300‑series misfire codes or coil circuit faults.

Should coils be replaced as a set?
On the V6, if one coil is gone and the others test borderline, replacing the set can save repeat visits. On the LS1 V8, it’s fine to replace just the faulty coil, provided the rest test within spec and connections are clean and tight.