I've replaced 6 or 7 bulbs in the headlight on my S10 since April when I got it.
I happens randomly
It isn't LH/RH specific, but I think that once one goes (and is replaced) then other side goes
I've tried cheap & cheerful bulbs, I've tried Osram Night Racer 110 bulbs.
Can anyone with a little more knowledge of the electrickery substance offer any tip for investigation...before you ask I have tried to lick it but it made no difference...