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Holden Acadia Engine Number
Use this guide to locate the engine number on your Holden Acadia and line up the right engine-related parts enquiry.
The Holden Acadia (AC series, 2018-2020) was a large seven-seat SUV, essentially a rebadged second-generation GMC Acadia built on GM's C1XX platform and imported from North America. It was powered by a 3.6-litre petrol V6, available in front-wheel drive and all-wheel drive, and was one of the last new models Holden launched before the brand was retired.
Where to find your Holden engine number
The stamped engine number is on a machined pad on the block. Its location depends on the engine family:
- Inline six-cylinder: on a pad on the right-hand side of the block, above the engine-mount boss.
- V8 (253 / 308, 4.2 / 5.0 litre): on a pad on the left-hand side of the block, above the engine mounting.
- V6 (Buick-derived, Ecotec, Alloytec): on the front left-hand face of the block, below the ignition coil.
- Later V6 and LS V8 models: the build / engine plate sits on the radiator support panel (VT-VZ era) or the passenger-side strut tower (VE / VF era).
You may need to wipe the pad clean to read the stamped number, and on air-conditioned cars the compressor can sit in front of it. Older Holden engines use a capacity-plus-tune prefix (for example 186S or a Q-series V8 code), while modern engines (Ecotec, Alloytec and the LS V8 family) use a GM engine code plus a separate stamped serial.
For the most accurate part match, send us both the engine code or prefix and the full stamped number, along with whether the car is automatic or manual.
On this model
The Acadia uses GM's 3.6-litre V6 from the High Feature engine family rather than a Holden-derived unit, so it is identified by a GM engine code and a stamped block serial, not a Holden engine prefix. This generation of 3.6 direct-injection V6 is commonly designated by the GM code LGX; if you can, verify this against the code shown on your engine or build documentation rather than assuming it. The definitive identifier is the alphanumeric engine number stamped on the block, which should be quoted alongside the VIN when sourcing driveline or ancillary parts. If you are unsure which code applies to your specific car, confirm it from the ID plate or a dealer parts lookup before ordering, as engine-specific components must match exactly.
This page also draws on later year-by-year data for Holden Acadia to cover modern variants.
Frequently asked questions
Where is the engine number on a Holden Acadia?
It is stamped on a machined pad on the engine block. Inline sixes are on the right side above the engine mount, the 253/308 V8s on the left side above the mount, and the V6 engines on the front left face below the ignition coil. You may need to wipe the pad clean to read it.
What is the difference between an engine prefix and an engine code?
Older Holden engines use a capacity-plus-tune prefix stamped on the block, while modern engines (Ecotec, Alloytec and the LS V8 family) use a GM engine code plus a separate stamped serial.
Do you match engine numbers to parts?
Yes. Send us the engine code or prefix and the full stamped number, plus whether the car is automatic or manual, and we will match the right engine-related part.
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