Daytime Driving Light (DRL) Module

[idahjo]

Well, I'm stumped

Have a 1998 Chev K-1500. The daytime driving lights work intermittently. The battery has a slow drain and will go dead in a couple days of being parked. It is a NEW high-end battery. Suspect that the DRL is the root of the evil and probably replacing the module just may take care of the problem. The part looks like so:
Where this bugger resides is the best kept secret on planet earth. Anything I have seen about it says the DRL is a black-finned unit about the size of a pack of cigarettes above your right knee, under the dash. Found it (inaccessible as it is to remove to examine) but, it doesn't appear to be the thing... from what I gather it is a voltage reducer for the DRL to drop the low-beam headlight filament voltage 2 volts. Where would this da#@mn thing plug into anyway?
Thanks for any help you can provide