I had a Blazer ZR2 before my Edge. I got t-boned July 2008. After it was fixed there was this noise-most annoying noise EVER. I took it back to the body shop, couldn't find it. Three car savvy guys could not find it. Replaced the shocks, could not find it. Took it to a repair shop, said it was the ball joints. Knew that was not right. So I kept driving it with the annoying noise. I narrowed it down to the front passenger area. Noise would get worse with speed and bumps. In December that year the fuel pump blew and it went to a shop where they fix my dad's fleet trucks. They fixed it took it for a test drive, called my dad and asked why in the world would I drive it like that. He explained what I said above and the mechanic said 'give me 10 minutes we'll find it' and he did. Hood was not bolted on that side, that was it. Cars have a sick sense of humor.