Third and Fourth Gear Only (2-3 Solenoid Stuck Off)

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Checks	Cause
DEFINITION: The transmission only provides third and fourth gear in Drive range. The shift pattern as the vehicle accelerates from a stop is 4-3-3-4. Third gear ratio is 1.000:1 and fourth gear ratio is 0.705:1.
Control Valve Body Assembly	A faulty 2-3 shift solenoid valve assembly (315B) is stuck Off. A missing or mislocated 2-3 shift solenoid valve (315B) and retainer (314C) A missing or damaged shift solenoid valve O-ring seal (316) Plugged or damaged solenoid valve screen/seal assembly (382) Debris is found in the control valve body (301) or the control valve body spacer plate and gasket assembly (396)