Hey everyone. I currently own a 99 Cadillac STS with the factory BOSE audio system. I recently purchased a Pioneer DEH-P940MP Premiere MultiCD headunit and am looking to install that. I took the car to Tweeter and they claimed that installing it could cause the car to malfunction with the computer chips (or some bogus excuse like that). Is this true? Is there really no way to install this without a risk to the car? Thank you.