Hybrid Low, 1-2 Clutch Assembly
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
HL 12 clutch fluid exhausts from the hybrid low, 1-2 clutch to the shift solenoid valve - mode B allowing the hybrid low, 1-2 clutch to release.