Following the guides:
Timing belt change on 2006 Aveo LS: My new detailed write-up
and
Timing belt

And I'm using the Lisle 36880 DOC lock tool, but I must be doing something wrong...

The only way I could get it to fit was like this:
Name: IMG_0449[1].jpg Views: 22350 Size: 291.9 KB
where one tooth of the tool is up under the belt (Yeah. I know the cams are not aligned...had to turn things to get the tool tooth into this location.)

When I try to square up the tool it fits in three teeth, but not the fourth
Name: IMG_0450[1].jpg Views: 6869 Size: 291.5 KB
see
Name: IMG_0451[1].jpg Views: 2459 Size: 284.1 KB

I guess three in and one on the top of a cam tooth should hold it, but I'd sure feel better if all four were locked in place.

Thoughts?