One problem related to engine belts and pulleys has been reported for the 2012 Chevrolet Suburban. The most recently reported issues are listed below.
Having issues with various warning lights will come on in the dash (seatbelt, traction control, air bags), the radio will go dead and the headlights will flicker, and it loses power and steering for a few seconds. It seems to happen when I'm applying brakes or turning corners and just at random times. I'm very worried about this happening for extended periods of time, especially on hard curves when you lose power. The dealer is reporting that it is a ground cable issue and want us to cover the entire cost of repairs.