Wow, yeah, it looks like the Duramax engine has a 15-year belt replacement interval that costs $10K at today's rates.

They aren't even trying to hide the whole planned-obsolescence thing at this point. Average age of cars on the road is approaching 13 years now, so someone who buys a Duramax-based vehicle will end up with a metal and plastic brick that costs more to maintain than it's worth, just because of the timing belt alone.