Can the 2024 GMC Sierra 2500HD make a U-turn?

No. Needs more than 40 ft.

46.9ft curb to curb

6.9 ft short on a 40 ft street.
2024 GMC Sierra 2500HD 2WD Reg Cab 142" Pro.
Tighter than 2% of 330 cars (2024).

Street width, feet

Street 40 feet curb to curb.

2024 GMC Sierra 2500HD 2WD Reg Cab 142" Pro. Top view, to scale.

2024 GMC Sierra 2500HD 2WD Reg Cab 142" Pro: U-turn by street width
Street	Margin	One move
30 ft	-16.9 ft	No
34 ft	-12.9 ft	No
38 ft	-8.9 ft	No
40 ft	-6.9 ft	No
42 ft	-4.9 ft	No
46 ft	-0.9 ft	No

2024 GMC Sierra 2500HD: turning circle by trim, 40 ft street
Trim	Circle, ft	Margin	One move
2WD Reg Cab 142" Pro	46.9	-6.9 ft	No
Pro Regular Cab LB RWD	57	-17 ft	No
3500HD CC 2WD Reg Cab 146" WB, 60" CA Pro	47	-7 ft	No
3500HD CC 2WD Reg Cab 171" WB, 84.5" CA Pro	54	-14 ft	No
Pro Double Cab RWD	49.5	-9.5 ft	No
Pro Crew Cab LB RWD	57	-17 ft	No
Pro Double Cab LB RWD	53.9	-13.9 ft	No
4WD Reg Cab 142" Pro	46.9	-6.9 ft	No
Pro Regular Cab LB 4WD	57	-17 ft	No
3500HD CC 4WD Reg Cab 146" WB, 60" CA Pro	47	-7 ft	No
2WD Crew Cab 159" Pro	52.7	-12.7 ft	No
Pro Crew Cab RWD	57	-17 ft	No
3500HD CC 4WD Reg Cab 171" WB, 84.5" CA Pro	54	-14 ft	No
2WD Crew Cab 172" Pro	57	-17 ft	No
3500HD CC 2WD Crew Cab 177" WB, 60" CA Pro	57.5	-17.5 ft	No
Pro Double Cab 4WD	49.5	-9.5 ft	No
2WD Reg Cab 142" SLE	46.9	-6.9 ft	No
SLE Regular Cab LB RWD	57	-17 ft	No
Pro Double Cab LB 4WD	53.9	-13.9 ft	No
3500HD CC 2WD Reg Cab 146" WB, 60" CA SLE	47	-7 ft	No
3500HD CC 2WD Reg Cab 171" WB, 84.5" CA SLE	54	-14 ft	No
4WD Crew Cab 159" Pro	52.7	-12.7 ft	No
Pro Crew Cab 4WD	57	-17 ft	No
4WD Crew Cab 172" Pro	57	-17 ft	No
Pro Crew Cab LB 4WD	57	-17 ft	No
SLE Double Cab RWD	49.5	-9.5 ft	No
SLE Double Cab LB RWD	53.9	-13.9 ft	No
3500HD CC 4WD Crew Cab 177" WB, 60" CA Pro	57.5	-17.5 ft	No
4WD Reg Cab 142" SLE	46.9	-6.9 ft	No
SLE Regular Cab LB 4WD	57	-17 ft	No
3500HD CC 4WD Reg Cab 146" WB, 60" CA SLE	47	-7 ft	No
3500HD CC 4WD Reg Cab 171" WB, 84.5" CA SLE	54	-14 ft	No
2WD Crew Cab 159" SLE	52.7	-12.7 ft	No
SLE Crew Cab RWD	57	-17 ft	No
2WD Crew Cab 172" SLE	57	-17 ft	No
SLE Crew Cab LB RWD	57	-17 ft	No
3500HD CC 2WD Crew Cab 177" WB, 60" CA SLE	57.5	-17.5 ft	No
SLE Double Cab 4WD	49.5	-9.5 ft	No
SLE Double Cab LB 4WD	53.9	-13.9 ft	No
4WD Crew Cab 159" SLE	52.7	-12.7 ft	No
SLE Crew Cab 4WD	57	-17 ft	No
4WD Crew Cab 172" SLE	57	-17 ft	No
SLE Crew Cab LB 4WD	57	-17 ft	No
3500HD CC 4WD Crew Cab 177" WB, 60" CA SLE	57.5	-17.5 ft	No
SLT Double Cab RWD	57	-17 ft	No
SLT Double Cab LB RWD	57	-17 ft	No
2WD Crew Cab 159" SLT	52.7	-12.7 ft	No
SLT Crew Cab RWD	57	-17 ft	No
2WD Crew Cab 172" SLT	57	-17 ft	No
SLT Crew Cab LB RWD	57	-17 ft	No
SLT Double Cab 4WD	57	-17 ft	No
SLT Double Cab LB 4WD	57	-17 ft	No
4WD Crew Cab 159" SLT	52.7	-12.7 ft	No
SLT Crew Cab 4WD	57	-17 ft	No
4WD Crew Cab 172" SLT	57	-17 ft	No
SLT Crew Cab LB 4WD	57	-17 ft	No
4WD Crew Cab 159" AT4	52.7	-12.7 ft	No
AT4 Crew Cab 4WD	57	-17 ft	No
4WD Crew Cab 172" AT4	57	-17 ft	No
AT4 Crew Cab LB 4WD	57	-17 ft	No
4WD Crew Cab 159" Denali	52.7	-12.7 ft	No
Denali Crew Cab 4WD	57	-17 ft	No
4WD Crew Cab 172" Denali	57	-17 ft	No
Denali Crew Cab LB 4WD	57	-17 ft	No
4WD Crew Cab 159" AT4X	51.8	-11.8 ft	No
AT4X Crew Cab 4WD	57	-17 ft	No
4WD Crew Cab 159" Denali Ultimate	52.7	-12.7 ft	No
Denali Ultimate Crew Cab 4WD	57	-17 ft	No
4WD Crew Cab 172" Denali Ultimate	57	-17 ft	No
Denali Ultimate Crew Cab LB 4WD	57	-17 ft	No

What this cannot tell you

Curb-to-curb turning circle as listed.

Mirrors and overhang need more room.

2 or more sources
1 source
Model-level, rule or estimate
Sources disagree

How values are checked

Can the 2024 GMC Sierra 2500HD make a U-turn?

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What this cannot tell you