Recommended Fuel

Use regular unleaded gasoline with a posted octane rating of 87 or higher. If the octane rating is less than 87, an audible knocking noise, commonly referred to as spark knock, might be heard when driving.

If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. If heavy knocking is heard when using gasoline rated at 87 octane or higher, the engine needs service.

    See also:

    Acadia in the Market
    The Acadia Denali does what it sets out to do: Be a more luxurious three-row crossover than the standard Acadia. GMC includes the right things — dual-pane sunroof, differentiating body panels an ...

    When to Inspect the Engine Air Cleaner/Filter
    Inspect or replace the air cleaner/ filter at the scheduled maintenance intervals. See Maintenance Schedule on page 11‑3 for more information. If driving in dusty/dirty conditions, inspect t ...

    XM Radio Messages
    XL (Explicit Language Channels): These channels, or any others, can be blocked at a customer's request, by calling 1-800-929-2100 in the U.S. and 1-877-438-9677 in Canada. XM Updating: The encryption ...