Condition 2
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 PCM commands 4th gear with the TP angle 5 percent or more and the gear ratio indicates 1st gear, 1.80:1 to 2.97:1, for 1 second.