Your 2007 has a the 5 yr/100K mile warranty on its belt, Thats the year they put in a better belt, or did some redesigning to the engine. Mine 'lasted for 11 years. But only 39K miles. it still might be running fine, but I finally have some peace of mind as I drive...the little that I do drive.
I replaced it all because of the age of the belt. OLD rubber will snap sooner or later. I was running on pure luck. I have lived in total fear, for over 5 years, that it could snap at any second, because of the AGE of the rubber, not the miles.

My parents had a 1998 Ford Escort sedan, and their timing belt snapped while DRIVING on I-95, it just snapped out of the blue, at like 110K miles. BUT believe it or not, it had a NON interference engine, so no damage to the engine, or they stopped so fast, no engine damage, I forget. BUT even WAY back then, it was an $1,100 job to fix. It was towed to a Ford dealership, and took 2 days to get it back.
BUT I made them buy a full coverage extended warranty, online, dropped the one bought from Ford, that cost 3 times as much, over $3K, the one I found them, way back in those days, was like $1,200, they are STILL that price now for a warranty, on the Aveo. So i cant afford one, AND I would have had to wait till it snapped and caused damage to the engine,..to be a 'repair', not 'maintenance'. Well they only paid the $50 deductible and got it all repaired. So the warranty paid for itself. It never broke again, nothing big like that. They kept it till they got some Buick sedan. So you have the model year GM did the redesign and the warranty is much longer....lucky guy!