Manual Downshifts
WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2001 Oldsmobile Intrigue. However, it is still accessible from the selected car via links, so may be relevant.
The shift solenoid valves do not control the 4-3 manual downshift. The 4-3 manual downshift is hydraulic. The 3-2 and 2-1 manual downshifts are electronic. The solenoid states will change during, or shortly after a 4-3 downshift is selected.