Seized Engine!

[f5fstop]

And Hummer should be pissed. Camshaft replacement is a half day job with the right special tools, and all Hummer dealers have been given the right special tools. Not like the pain in the ass head replacement, camshafts are extremely easy to take off and replace.
This dealer is really putting you off, and from what you have reported. screwing GM/Hummer in the process. It is very evident they have no idea what they are doing or are just lying to the customer about what they have to do.
We have been working for the past week on the cylinder head removal to shorten the time without causing any engine damage.
Good luck....