One problem related to battery has been reported for the 2008 Chevrolet Suburban. The most recently reported issues are listed below.
I am a military helicopter test pilot and faa licensed aircraft mechanic. We bought this vehicle new in 2008 and it has been properly maintained and cared for. We had to replace a dead battery in July 2011 and following that the radio stopped keeping time when the vehicle was turned off. Then a few weeks later the electrical system shorted out multiple times while driving. The door locks cycled repeatedly and the instrument console flashed in unison. Also following each event the radio clock time and date had reset. It has done this on four separate occasions since late July. As a precaution the battery connections were rechecked and found properly secured, although this should not have caused this problem. Each time the problem has occurred it has happened quickly but the engine momentarily exhibited reduced power when it happened.