[Jugie]

Don't know if you found your DRL module location yet.
I have a 1996 GMC 1/2 ton and also had a real problem finding it.
On my truck it is located just to the left of the steering column taped on top of the main wiring harness just rear of where the harness splits into a Y
The board is located inside the grey plastic connector box, also mine was covered with a grey/charcoal foam that also looked like a foam tape.
This is all original as I've owned the p/u since new, hope this helps somebody