What are the symptoms of a crack in the Cadillac CTS intake system?

Symptoms of a crack in the Cadillac CTS intake system may include a rough idle, decreased engine performance, and increased fuel consumption. Additionally, you might notice a hissing or whistling noise as air leaks from the crack. The check engine light may also illuminate due to changes in the air-fuel mixture or other related issues. If left unaddressed, these symptoms can lead to more significant engine problems.