How do you reset a check engine light on a Pontiac Montana?

To reset the check engine light on a Pontiac Montana, you can disconnect the negative battery cable for about 15 minutes, which will clear the engine's trouble codes. Alternatively, you can use an OBD-II scanner to read and clear the codes directly. If the light comes back on after resetting, it's important to address the underlying issue that triggered it. Always consult a professional mechanic if you're unsure about diagnosing the problem.