Looks like it will fit. 2006 pattern is actually a 5 x 120mm. See discussion in link
5x115
bolt pattern for 1979 Pontiac Bonneville
the bolt pattern for Pontiac torrents is 5- 115
PONTIAC G8 BOLT PATTERN IS 5X120; OFFSET: HIGH. LUGS 14X1.5
Wheel bolt pattern: 5 x 100
85 pontiac parisienne lug pattern and offset
The wheel bolt pattern is 5x115
No...it will have the bolt pattern of the Pontiac, Cadillac, Olds and Buick. Chevy has a different bolt pattern. There are some transmissions that do have the dual bolt pattern, but I don't think the TH 400 was one of them.
the bolt pattern is 5x5 like the 1994-96 Impalas.
You could either buy new hubs, or use an adapter. I would not advise the adapter option for high stress/ frequent 4X4 users.
5X115
5x100