Removal Procedure

Disconnect the charge air cooler outlet air tube from the throttle body. Charge Air Cooler Outlet Air Tube Replacement (LTG)
Starter Replacement (LTG) - Remove
Raise and suitably support the vehicle. Lifting and Jacking the Vehicle (ATS)
Two-Piece Propeller Shaft Replacement (LTG, LGX) - Remove
{If equipped} Front Axle Propeller Shaft Replacement (LGX, LTG) - Remove
Catalytic Converter Replacement - Remove
Fig 1: Identifying Transmission Range Selector Lever Cable, Terminal, Shift Lever Pin And Retainer
Courtesy of GENERAL MOTORS COMPANY

Disconnect the transmission range selector lever cable terminal (1) from the transmission manual shift lever pin (6).
Slide the retainer (4) forward to release the transmission range selector lever cable (5) from the bracket.
Courtesy of GENERAL MOTORS COMPANY

Remove the auxiliary heater pump bracket (3) from the transmission and position aside.
Courtesy of GENERAL MOTORS COMPANY

Place an oil drain pan under the transmission fluid cooler pipes (1).
Remove the transmission fluid cooler inlet and outlet pipes (1) from the transmission, and position aside, or remove from the vehicle as necessary. Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LTG With AWD, Without V03) , or Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LTG With RWD, Without V03) , or Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LTG With RWD, With V03) , or Transmission Fluid Cooler Inlet and Outlet Pipe Replacement (LTG With AWD, With V03)
Plug the open fluid ports to prevent fluid loss and contamination.
Transmission Converter Cover Replacement (Rear Wheel Drive) , or Transmission Converter Cover Replacement (All Wheel Drive) - Remove
Courtesy of GENERAL MOTORS COMPANY

Remove the transmission close out plug (1).
Mark the torque converter to flexplate orientation to ensure proper realignment.
Courtesy of GENERAL MOTORS COMPANY

Repeat the following steps for all torque converter bolts (1):
1. Rotate the harmonic balancer center bolt clockwise ONLY, in order to align the torque converter bolt with the starter opening.
2. Remove and Discard the torque converter bolt.
Courtesy of GENERAL MOTORS COMPANY

Remove the catalytic converter bracket (2) from the transmission.
Courtesy of GENERAL MOTORS COMPANY

Remove the catalytic converter shield (4) from the engine assembly.
Disconnect the electrical wiring harness retainers from the transmission to engine fasteners and from the transmission case.
Support the transmission with a suitable transmission jack.
Courtesy of GENERAL MOTORS COMPANY

Remove the lower right transmission to engine bolt (1).
Courtesy of GENERAL MOTORS COMPANY

Remove the lower left transmission to engine bolts (1, 2).
Courtesy of GENERAL MOTORS COMPANY

Remove the left upper transmission to engine bolts (1, 2).
Support the transmission with a suitable transmission jack.
Transmission Support Replacement (Automatic RWD) , or Transmission Support Replacement (Automatic AWD) - Remove
Tilt the transmission downward just enough to gain access to the upper transmission fasteners.
Courtesy of GENERAL MOTORS COMPANY

Disconnect the transmission vent hose (2) and retainer (1) from the transmission, then position aside.
Courtesy of GENERAL MOTORS COMPANY

Remove the transmission to engine bolts (1, 2, 3).
Pull the transmission straight back.
Install the J-21366 strap onto the transmission bell housing to retain the torque converter.
Remove the transmission from the vehicle.
Transfer components as necessary.
Inspect the transmission fluid cooler, hoses, and pipes for leaks or damage. Replace as necessary.