Can the 2026 Chevrolet Silverado 3500HD make a U-turn?

No. Needs more than 40 ft.

57ft curb to curb

Street width, feet

Street 40 feet curb to curb.

2026 Chevrolet Silverado 3500HD Work Truck Regular Cab LB RWD. Top view, to scale.

2026 Chevrolet Silverado 3500HD: turning circle by trim, 40 ft street
Trim	Circle, ft	Margin	One move
Work Truck Regular Cab LB RWD	57	-17 ft	No
Work Truck Regular Cab LB DRW RWD	57	-17 ft	No
Work Truck Double Cab LB RWD	57	-17 ft	No
Work Truck Regular Cab LB 4WD	57	-17 ft	No
Work Truck Double Cab LB DRW RWD	57	-17 ft	No
Work Truck Crew Cab RWD	52.7	-12.7 ft	No
Work Truck Crew Cab LB RWD	57	-17 ft	No
Work Truck Regular LB DRW 4WD	57	-17 ft	No
Work Truck Double Cab LB 4WD	57	-17 ft	No
Work Truck Crew Cab LB DRW RWD	57	-17 ft	No
Work Truck Double Cab LB DRW 4WD	57	-17 ft	No
Work Truck Crew Cab 4WD	52.7	-12.7 ft	No
Work Truck Crew Cab LB 4WD	57	-17 ft	No
LT Regular Cab LB 4WD	57	-17 ft	No
Work Truck Crew Cab LB DRW 4WD	57	-17 ft	No
LT Regular Cab LB DRW 4WD	57	-17 ft	No
LT Double Cab LB 4WD	57	-17 ft	No
LT Double Cab LB DRW 4WD	57	-17 ft	No
LT Crew Cab 4WD	52.7	-12.7 ft	No
LT Crew Cab LB 4WD	57	-17 ft	No
LT Crew Cab LB DRW 4WD	57	-17 ft	No
LTZ Crew Cab 4WD	52.7	-12.7 ft	No
LTZ Crew Cab LB 4WD	57	-17 ft	No
LTZ Crew Cab LB DRW 4WD	57	-17 ft	No
High Country Crew Cab 4WD	52.7	-12.7 ft	No
High Country Crew Cab LB 4WD	57	-17 ft	No
High Country Crew Cab LB DRW 4WD	57	-17 ft	No
2WD Double Cab 162" Work Truck	53.9	-13.9 ft	No
2WD Reg Cab 142" Work Truck	46.9	-6.9 ft	No
4WD Double Cab 162" LT	53.9	-13.9 ft	No
4WD Double Cab 162" Work Truck	53.9	-13.9 ft	No
4WD Reg Cab 142" LT	46.9	-6.9 ft	No
4WD Reg Cab 142" Work Truck	46.9	-6.9 ft	No

What this cannot tell you

Curb-to-curb turning circle as listed.

Mirrors and overhang need more room.