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Oh button placement.

Chevrolet Volt Gen 1. Vertical button arrangement:

<Drive Mode>

<large gap>

<Power Button>

2013 Volt added Hold mode to the Drive Modes.

Normal to Hold mode: press Drive Mode 4 times.

Sport to Hold mode: press Drive Mode 3 times.

Hold to Sport mode: press Drive Mode 2 times.

Shut car off while driving: press Power Button 2 times.

What could possibly go wrong ...