Depending on the model of your home, part of the garage wall studs are actually wood. The walls that ARE NOT common (to interior partition walls) in my Patio Home are wood stud construction. It is easy to determine using a finishing nail .... you can feel the nail bite into wood and it will just bounce on metal.
Regardless, using 2 - 3 #12 x 2" self tapping screws along each metal stud is more than adequate to hang cabinets. I suggest using hex head screws and a hex driver in a drill / screw gun.
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