How do you reset check engine light on 2001 lesabre?

To reset the check engine light on a 2001 Buick LeSabre, you can disconnect the negative battery cable for about 15 minutes, then reconnect it. This will clear the error codes stored in the computer. Alternatively, you can use an OBD-II scanner to read the codes and then clear them. However, make sure to address any underlying issues before resetting the light to avoid it coming back on.