Condition 1
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
The PCM commands 1st gear with the transmission OSS 100 RPM or more and the gear ratio indicates 4th gear, 0.65:1 to 0.75:1, for 1 second.