Yes, the hub is identical
Same 6x139.7 PCD and same 78.1 mm centre bore: wheels from Chevrolet Avalanche bolt on and centre on Chevrolet Silverado 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 Avalanche is compared with the one from Chevrolet Silverado 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.
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≈8.5Jx17 ET31 · 265/70R17 — Check on the car
Compared with the original ≈7.5Jx17 ET31 on Chevrolet Silverado: shock absorber side +12.7 mm, wheel arch side +12.7 mm, tyre diameter +3.6 % : fit it with the original tyre size of Chevrolet Silverado (245/70R17), not that of Chevrolet Avalanche.
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 Silverado (Ecrous - 14x1.50), 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 Silverado on Chevrolet Avalanche?