Generation 1 Chevy Volt (2011-2015)
and I can't get it back on.
It's the outside door to the gas tank. I've only opened it about three times in 7 months. It's all plastic, about the size of a bread-and-butter plate, blue like my 2014 Volt, and it looks like it should just snap back on, on a little hinge. But it won't! I...