Where is the reverse or backup switch located? on 1994 GMC Yukon

My backup lights don't work. I've replaced the bulbs already and the problem is still there. I suspect the reverse switch is not working. Can't seem to find it though.

Asked by for the 1994 GMC Yukon
Should be on top of the steering column. Just carefully remove the plastic covers.
seriously? it's not on the transmission?
94 Yukon: ALLdata says in on the column...
cool! Thanks. I'll grab the crowbar and get to work,
I know you mean screwdriver....
screwdriver, crowbar .. same thing. :) How many times have we used a screwdriver for a crowbar? Gotta work the other way around.

You know how deep on the column it is? Do I start from the top or work my way up from the bottom? I could easily see myself with a dissembled dash only to find it was accessible from the bottom.
It said it was near the top
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Try checking your fuses too....