Condition 1
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The TCM commands 1st gear with the TCC slip speed greater than -20 RPM and the gear ratio indicates 4th gear, 0.65:1 to 1.87:1, for 3 seconds.