Where do I find the engine model year?

Look for the engine manufacturer's emission control label. The engine year may differ from the vehicle year shown on your registration, particularly after an engine replacement. A missing or unreadable label should be resolved with the manufacturer rather than guessed from the truck's appearance.

For a CTCA inquiry, send the engine details you have and tell us what is uncertain. A clear label photograph can help our team review the appropriate appointment; do not remove or alter the label.

Official source: CARB engine-label guidance.