Some 2020 Silverado and Sierra models equipped with the 8-speed automatic transmission (RPO MQE) may have a slipping or improper shifting condition or may have defaulted to only one gear. DTC P0796 (Transmission Control Solenoid Valve 3 Stuck Off) also may be set.
If these conditions are present, the transmission oil pan should be removed and inspected for debris. (Fig. 20) If the pan is clean, replace the control valve body.
Fig. 20
If there is evidence of failed clutch material, the transmission should be removed and inspected. Complete a cost comparison to determine if the transmission should be repaired or replaced. Any repairs should include the control valve body replacement. (Fig. 21)
Fig. 21
TIP: Use the DT-48285 Valve Body Torx Plus Socket to remove the 11 valve body bolts and the valve body assembly from the transmission.
After installing the control valve body onto the transmission, be sure to perform the Service Fast Learn procedure. If not performed, it may result in poor transmission performance.
– Thanks to Terry Neuendorf
make sure you write pun info before installation
So is it control valve body that’s causing clutch damage just to be clear on this repair? or is the derby from somewhere else causing the Control Solenoid Valve 3 Stick .