Yes, the hub is identical
Same 5x115 PCD and same 70.3 mm centre bore: wheels from Buick LaCrosse bolt on and centre on Chevrolet Volt without rings. You still need to check the offset and tyres, detailed below.
≈: width estimated from the original tyre size.
Wheel by wheel: offset and tyres
Each original wheel from Buick LaCrosse is compared with the one from Chevrolet Volt of the same diameter: how much closer the wheel gets to the shock absorber or how far it sticks out of the wheel arch, and whether the tyre keeps the same overall diameter.
- !
≈7Jx16 ET52 · 225/60R16 — Check on the car
Compared with the original ≈6.5Jx16 ET41 on Chevrolet Volt: shock absorber side +17.4 mm, wheel arch side −4.7 mm, tyre diameter +3.7 % : fit it with the original tyre size of Chevrolet Volt (205/60R16), not that of Buick LaCrosse.
Comparison for guidance only (estimated width). Check in detail
Before fitting the wheels
An identical hub is not enough: offset, width and diameter change the position of the wheel, and larger calipers can touch a smaller wheel. Original wheels often use bolts or nuts with a specific seat: keep the fixings intended for the wheel, with the thread of Chevrolet Volt (Ecrous - 12x1.50), tightened to the torque shown on its vehicle page. Finally, check that the size is among the approved fitments for your vehicle. This comparison is for guidance only: have the fitting approved by a professional.
And the other way round: wheels from Chevrolet Volt on Buick LaCrosse?