I am having the hardest time finding aftermarket pieces parts for my car, ie strut tower brace, brake upgrades. I have heard that the 05 GXP stuff will fit. Will someone please point me in the right direction.
No, the Bonneville is an H-body. Very little will fit, other than engine parts. You'll either need to find a GXP, or get the Brackets and brace from GMPD, and get some bolts from the GXP strut tower brace.