Yes, the hub is identical
Same 5x115 PCD and same 70.3 mm centre bore: wheels from Chevrolet Alero bolt on and centre on Pontiac Grand Am 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 Chevrolet Alero is compared with the one from Pontiac Grand Am 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.
- !
≈7Jx15 ET43 · 215/60R15 — Check on the car
Compared with the original ≈7Jx15 ET8 on Pontiac Grand Am: shock absorber side +35 mm, wheel arch side −35 mm, tyre diameter −8.2 % : fit it with the original tyre size of Pontiac Grand Am (225/70R15), not that of Chevrolet Alero.
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 Pontiac Grand Am (Ecrous - 7/16 - 20 U), 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 Pontiac Grand Am on Chevrolet Alero?