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

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.

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)