Hello everyone. New user and new owner of 2024 ZR2 with the baby max 3.0. I have two issues. First, when playing music the audio volume rises and lowers by itself. Second , when I bought the truck it had 10,000 miles. The second day I drove it the check engine light came on and a message to service the DEF system popped up. The check engine light has been sporadic and I have an appointment to have it checked out. Has anyone else had these issues. Thanks for your responses.