Went to change the serpentine belt on my sons '04 GT today. Bought an AC Delco 6K905. Removed the old belt and could not get the new one on. Tried and tried but it will not go on. I measured it up against the old belt and if there is any difference there is like an eighth of an inch. The new belt is slightly shorter than the old one. Putting the old belt back on was a PITA also. So what belt should I get? Or is there a technique that I am missing? Any help will be appreciated. Thanks
Don