Can the 2020 Chevrolet Silverado 1500 make a U-turn?

No. Needs more than 40 ft.

44.6ft curb to curb

Street width, feet

Street 40 feet curb to curb.

2020 Chevrolet Silverado 1500 Work Truck Regular Cab RWD. Top view, to scale.

2020 Chevrolet Silverado 1500: turning circle by trim, 40 ft street
Trim	Circle, ft	Margin	One move
Work Truck Regular Cab RWD	44.6	-4.6 ft	No
Work Truck Double Cab RWD	46.3	-6.3 ft	No
Work Truck Regular Cab 4WD	44.6	-4.6 ft	No
Custom Double Cab RWD	46.9	-6.9 ft	No
Work Truck Crew Cab RWD	46.3	-6.3 ft	No
Work Truck Crew Cab LB RWD	49.5	-9.5 ft	No
Work Truck Double Cab 4WD	46.3	-6.3 ft	No
Custom Crew Cab RWD	46.3	-6.3 ft	No
LT Double Cab RWD	46.3	-6.3 ft	No
Custom Crew Cab LB RWD	49.5	-9.5 ft	No
Custom Double Cab 4WD	46.9	-6.9 ft	No
Work Truck Crew Cab 4WD	46.3	-6.3 ft	No
Work Truck Crew Cab LB 4WD	49.5	-9.5 ft	No
RST Double Cab RWD	46.3	-6.3 ft	No
LT Crew Cab RWD	46.3	-6.3 ft	No
Custom Trail Boss Double Cab 4WD	46.3	-6.3 ft	No
LT Crew Cab LB RWD	49.5	-9.5 ft	No
Custom Crew Cab 4WD	46.3	-6.3 ft	No
LT Double Cab 4WD	46.3	-6.3 ft	No
Custom Crew Cab LB 4WD	49.5	-9.5 ft	No
RST Crew Cab RWD	46.3	-6.3 ft	No
RST Crew Cab LB RWD	49.5	-9.5 ft	No
Custom Trail Boss Crew Cab 4WD	46.3	-6.3 ft	No
Custom Trail Boss Crew Cab LB 4WD	49.5	-9.5 ft	No
RST Double Cab 4WD	46.3	-6.3 ft	No
LT Crew Cab 4WD	46.3	-6.3 ft	No
LT Crew Cab LB 4WD	49.5	-9.5 ft	No
LTZ Double Cab RWD	46.3	-6.3 ft	No
RST Crew Cab 4WD	46.3	-6.3 ft	No
RST Crew Cab LB 4WD	49.5	-9.5 ft	No
LTZ Crew Cab RWD	46.3	-6.3 ft	No
LTZ Crew Cab LB RWD	49.5	-9.5 ft	No
LT Trail Boss Double Cab 4WD	50.2	-10.2 ft	No
LTZ Double Cab 4WD	46.3	-6.3 ft	No
LT Trail Boss Crew Cab 4WD	46.3	-6.3 ft	No
LTZ Crew Cab 4WD	46.3	-6.3 ft	No
LT Trail Boss Crew Cab LB 4WD	49.5	-9.5 ft	No
LTZ Crew Cab LB 4WD	49.5	-9.5 ft	No
High Country Crew Cab RWD	46.3	-6.3 ft	No
High Country Crew Cab LB RWD	49.5	-9.5 ft	No
High Country Crew Cab 4WD	46.3	-6.3 ft	No
High Country Crew Cab LB 4WD	49.5	-9.5 ft	No

What this cannot tell you

Curb-to-curb turning circle as listed.

Mirrors and overhang need more room.