Can the 2024 Cadillac LYRIQ make a U-turn?

Yes. Fits a 40 ft street.

39.6ft curb to curb

Street width, feet

Street 40 feet curb to curb.

2024 Cadillac LYRIQ Tech RWD. Top view, to scale.

2024 Cadillac LYRIQ: turning circle by trim, 40 ft street
Trim	Circle, ft	Margin	One move
4dr Tech w/1SA RWD	39.7	+0.3 ft	Yes
Tech RWD	39.6	+0.4 ft	Yes
Tech AWD	39.6	+0.4 ft	Yes
4dr Luxury w/1SC RWD	39.7	+0.3 ft	Yes
Luxury 1 RWD	39.6	+0.4 ft	Yes
4dr Sport w/1SF RWD	39.7	+0.3 ft	Yes
Sport 1 RWD	39.6	+0.4 ft	Yes
Luxury 1 AWD	39.6	+0.4 ft	Yes
Sport 1 AWD	39.6	+0.4 ft	Yes
4dr Luxury w/1SD RWD	39.7	+0.3 ft	Yes
Luxury 2 RWD	39.6	+0.4 ft	Yes
4dr Sport w/1SJ RWD	39.7	+0.3 ft	Yes
Sport 2 RWD	39.6	+0.4 ft	Yes
Luxury 2 AWD	39.6	+0.4 ft	Yes
4dr Luxury w/1SE RWD	39.7	+0.3 ft	Yes
Luxury 3 RWD	39.6	+0.4 ft	Yes
Sport 2 AWD	39.6	+0.4 ft	Yes
4dr Sport w/1SK RWD	39.7	+0.3 ft	Yes
Sport 3 RWD	39.6	+0.4 ft	Yes
Luxury 3 AWD	39.6	+0.4 ft	Yes
Sport 3 AWD	39.6	+0.4 ft	Yes

What this cannot tell you

Curb-to-curb turning circle as listed.

Mirrors and overhang need more room.