GMC Repair: 2001 GMC Sierra 2500HD Diesel 6.6 Duramax Turbo, gmc sierra, fuse box

Question
My ABS light has come on and after turning  ignition off there seems to be a fan or pump still in operation. A loud buzzing or vibrating is coming from underneath  driver side area.  

Answer
Hi
It's the ABS EBCM (Electronic Brake Control Module).
It has an internal relay that has tuck on, keeping 12v going to the pump.
You can unplug the 60A mega fuse underhood fuse box to turn it off.
Only fix is a new EBCM (around $700.00 part)
I Hope this helps
Pawl