Parts for your 2016 Holden Colorado-Ignition coils

2016 Holden Colorado ignition coils — are they fitted or relevant?

Short answer: no. The 2016 Holden Colorado sold in Australia and New Zealand runs a 2.8‑litre four‑cylinder turbo‑diesel (RG series), so it doesn’t use ignition coils at all. Technical references back this up: the Holden RG Colorado Owner’s Handbook (2016) specifies a diesel powertrain and displays a glow‑plug indicator, the Holden/GM Global Service Information (GSI) for the RG Colorado covers “Engine Mechanical – Diesel” with no ignition system or coil‑pack procedures, the GM Electronic Parts Catalogue lists glow plugs but no ignition coils for 2016 RG VINs, and the VM Motori/GM 2.8 diesel engine documentation describes compression‑ignition operation without spark‑ignition components. Diesel fundamentals (as set out in Bosch Automotive diesel literature) further confirm there’s no role for coils because combustion is achieved by compressing air and injecting fuel, not by generating a spark.

Why no coils on this ute? Coils are only needed on petrol engines to step up voltage and fire spark plugs. The 2.8‑litre Colorado uses compression ignition, assisted by glow plugs for cold starts, plus a high‑pressure common‑rail system and electronically controlled injectors. That means if someone is offering “ignition coils” for a 2016 Colorado, it’s either a catalogue error or meant for an earlier petrol Colorado (like the pre‑RG RC V6) or an overseas petrol variant—not the 2016 AU/NZ diesel.

Owners chasing misfire‑style symptoms on a 2016 Colorado should look at diesel‑specific causes instead of coils. Think hard starting in the cold, uneven idle, hesitation under load, or smoke. These usually point to fuel delivery, air management, or cold‑start systems.

• Glow plugs and control module: check resistance and operation if cold starts are sluggish.
• Fuel system: replace the fuel filter at the recommended interval, confirm no water in fuel, test injector balance/return flow, and verify rail pressure.
• Air and boost: inspect intercooler hoses for splits, ensure MAP/MAF sensors and EGR are clean and functioning.
• Battery and cranking speed: a healthy battery and starter are crucial for diesel compression heat.
• ECM updates and fault codes: scan for DTCs and apply any available calibration updates.

So, while ignition coils aren’t part of the 2016 Colorado’s servicing, there’s plenty to stay on top of. Keeping the fuel clean, sensors tidy, and the glow system sharp will have this diesel pulling like it should across Aussie and Kiwi roads.

Popular questions about 2016 Holden Colorado “ignition coils”

Does a 2016 Holden Colorado have ignition coils?
No. The 2016 RG Colorado is a 2.8‑litre turbo‑diesel and uses compression ignition, glow plugs, and a common‑rail fuel system—no spark plugs or coils. This is reflected in the 2016 Owner’s Handbook, GM service manuals, and parts catalogues.

What causes misfire‑like symptoms on a 2016 Colorado diesel if there are no coils?
Common culprits are dirty or failing injectors, clogged fuel filters, boost leaks, fouled MAP/MAF sensors, EGR deposits, weak glow plugs, or low cranking speed from a tired battery. A scan for codes and a fuel/air system check usually points the way.

Did any Colorado models use ignition coils?
Yes—earlier petrol models such as the RC‑series V6 used coil‑on‑plug ignition. The 2016 RG diesel in AU/NZ does not.