Control Valve Lower Body and Upper Body Replacement

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Control Valve Lower Body And Upper Body (With Tightening Sequence)

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedures Remove the transmission electrical connector. Automatic Transmission Electrical Connector Passage Sleeve Replacement
1	Manual Shaft Detent Bolt CAUTION: Refer to Fastener Caution . Tighten 12 N.m (106 lb in)
2	Manual Shaft Detent Assembly
3	Control Valve Assembly Bolt [6x] Procedure Do not remove all the bolts in the control valve body assembly. Remove only the bolts indicated. Tighten in specified sequence. Tighten 8 N.m (71 lb in) Special Tools DT-48285 Valve Body Torx Plus Socket For equivalent regional tools, refer to Special Tools .
4	Control Valve Assembly
5	Fluid Pump Seal Procedure Discard seal and replace with new.
6	Fluid Pump Seal Procedure Discard seal and replace with new.
7	Center Support Fluid Passage Seal Procedure Discard seal and replace with new. It is recommended that transmission adaptive pressure (TAP) information be reset. Transmission performance may be affected as new TAP values are learned. Reset Transmission Adapts If replacing the control valve body assembly, remove the Control Solenoid Valve and Transmission Control Module Assembly Replacement , and the Manual Shift Shaft Position Switch Replacement .