Maybe this helps, if they kept the books consistent over the years.
I have a 96, I have the manual in PDF format. my lamp wire diagram is in section 8w-50, it is G102 for the ground on the LF head lamp.
Section 8w-90 lists the connector, splices and ground locations there is a table of grounds, g102 is listed near PDC, (power distribution center) and FIG3, if I go to FIG 3 it shows a picture of a bunch of grounds near the PDC.
5 years later maybe they stopped providing all this detail? But double check your index for the wiring section mine lists it in the WD index bottom right for the 8w-90 section.
Or skip towards the back of the wiring section as this is almost the end but has a bunch of details on physical harnesses amd locations the grounds are buried in the pics so need to play where is waldo a bit. Hidden in plain sight.
Or this is a complete waste for a 2001 book and sorry for that in advance.