Here's where you're most likely to find the GM engine code:
* Driver's side door jamb sticker (often called the "RPO sticker"): This sticker lists various options and codes, including the engine code (often abbreviated as something like "LXX" where XX are letters and numbers).
* Engine block: The engine code may be cast directly into the engine block itself. You'll usually need to look closely, perhaps with a flashlight, to find it. It might be near the top or a side of the block.
* Vehicle's title or registration: In some cases, the engine code or a description might be included on the vehicle title or registration document.
To find the engine code accurately:
1. Find the VIN: Locate the VIN on your vehicle's dashboard (usually visible through the windshield), or on the driver's side door jamb.
2. Use a VIN decoder: Many websites and services (some free, some paid) offer VIN decoding for GM vehicles. Enter your VIN and the decoder should provide a wealth of information about your vehicle, including its engine. However, be mindful that some free sites may be less accurate or may require a paid subscription to unlock the full report.
3. Check the resources listed above: Look at the door jamb sticker and the engine block itself.
Keep in mind that different GM engine codes correspond to different engines. Knowing the engine code is vital for ordering the correct parts and for getting accurate service information.
