On the 2000-2002 Buick Century, it resides to the left of the steering column, right above your left foot. There is a bump in the fuzzy trim panel that covers the under dash area that gives clearance to the BCM wiring harness

dang it wiring harness still pops up as a link will try again after some more scanning test again: Wiring Harness

After further cleaning also try manually typing..

The white striped wires are the front left and right feeds from the turn signal switch

google this...
opt out of viglink

This suggestion pleases me

The white striped wires are the front left and right feeds from the turn signal switch

well it was still showing turn signals as a link and with no luck on finding viglink on my computer started thinking this would never get resolved till I found a post saying some extensions would use viglink I only had one on turned it off now at least I am not seeing them anymore I hope this fixes it.The extension was F.B.(FluffBusting) Purity its a extension for Facebook that allows more custom options with FB oh well if that fix'* my issue them bye bye F.B.(FluffBusting)Purity

wow last post completely clean no highlighted link hot dog its about time Thank you

ok for the real test full post
2000-2002 Buick Century

Locate Body control Module (BCM). This unit is a black box approximately 6" square and 1-1/2" thick with 4 connectors entering one end. Hunting with the door open and key in the ignition, follow your ears to the chime inside. On the 2000-2002 Buick Century, it resides to the left of the steering column, right above your left foot. There is a bump in the fuzzy trim panel that covers the under dash area that gives clearance to the BCM wiring harness. The trim panel does not have to be removed completely to get in far enough to work. Pull out a couple of the panel retainers and work the left end down and back until you have working room. Those panel retaining fasteners are a push in "Christmas tree" type and can be difficult to remove. Persevere, this is the hardest part, The actual mods are easy.
The 4 connectors should now be visible almost even with the bottom of the dash. The connectors are color coded for identification. The first connector is C1, and is blue. We will be working with 4 out of the 7 wires in this connector. Locate the light blue, light blue w/white stripe, dark blue, and dark blue w/white stripe. The white striped wires are the front left and right feeds from the turn signal switch. The plain color wires go to the front left and right turn signal lamps. Very simply, cut all 4 wires about an inch from the connector and separately insulate the wires from the connector. Splice (and insulate) the like colors together that go into the harness. Dark blue to dark blue w/white, and light blue to light blue w/ white stripe. This removes the DRL function from the front turn signals.
The second connector is C2, and is purple. We will be working with only 2 of the 14 wires in this connector. Locate the yellow w/black stripe, and immediately adjacent to that, find the light green w/black stripe. These two wires connect to the Ambient Light Sensor. Cut these two wires about an inch from where they emerge from the harness. Connect a 4700 Ohm resistor (1/4 watt is fine) across the wires from the connector, and insulate. This makes the BCM stay in the daylight mode, and disables the automatic headlight function.
Test your work. Check operation of turn signals and headlights. Replace trim panel and congratulate yourself for a job well done.
2001 Buick Regal LS
Toasted1Too writes:
All that needs to be done is access the BCM and 1) locate connector C3 wire A4 (gray with black stripe), cut it and install a toggle switch between the cut ends, that takes care of the auto park lamps. 2) locate connector C3 wire A11 (white), cut it and install a toggle switch between the cut ends, that covers the auto head lights. These toggles can be remotely located with some wire and a little time.

This method provides the ability to switch between automatic operation and manual operation using the toggles and the headlight switch will still work regardless of the position of the add on toggles. It does prevent the instrument cluster from lighting up except for the PRND321 and odometer but my intention is to reduce the load on the alternator and battery while waiting or when warming the engine in the winter.