What Kind of Oil Does GMC Sierra Take? Engine Guide
The GMC Sierra takes oil specified by its engine and model year, not by the Sierra name alone. Most gasoline engines require full-synthetic dexos1 Gen 3 oil, while the 3.0L Duramax requires 0W-20 dexosD and the 6.6L Duramax generally uses heavy-duty diesel oil meeting CK-4 or the manual’s stated specification. Key Facts at a Glance […]