To find the correct spark plug, look for either:
* A sticker under the hood: This often lists recommended maintenance items, including spark plugs.
* Your owner's manual: This will specify the exact spark plug type recommended by the manufacturer.
* The engine block itself: The engine displacement (e.g., 4.2L, 2.8L, etc.) is usually cast into the block. Use this information to search online for the correct spark plug.
Once you know the engine size, you can search online (e.g., using Google, a parts store website like AutoZone or Advance Auto Parts) for the correct spark plug. You'll need to use the engine size and year/make/model of your Trailblazer for accurate results.
Do not just rely on general advice. Using the wrong spark plug can damage your engine. Always verify the correct part number before purchasing.
