Transmission Removal And Installation (5.3L & 6.0L Engines) - Chevrolet Trailblazer Service Manual

To Install:
1. Lift the transmission.
2. Remove the J 21366 converter holding strap from the bell housing.
3. Install the transmission onto the engine by pushing the transmission forward. Make
sure the transmission is aligned with the locator pins and the torque converter is
aligned with the mark on the flywheel.
4. Install the transmission nuts, studs, and bolts into the engine. Torque the nuts,
studs, and bolts to 37 ft-lb (50 Nm).
5. Install the flywheel bolts into the torque converter. Torque the bolts to 44 ft-lb (60
Nm).
6. Install the torque converter access plug into the transmission.
7. Remove the safety chain from around the transmission.
8. Connect the transmission vent hose to the transmission.
9. Connect the transmission and park/neutral position switch connectors.
10. Attach the fuel line bracket to the left side of the transmission.
11. Attach the fuel line bracket to the bell housing.
12. Attach the transmission heat shield to the transmission. Torque the bolts to 13 ft-lb
(17 Nm).
13. Install the range selector cable onto the bracket.
14. If equipped, install the transfer case into the vehicle.
15. Install the front exhaust pipe into the vehicle.
16. Attach the transmission mount to the transmission. Torque the bolts to 18 ft-lb (25
Nm).
17. Install the transmission support onto the frame.
18. Install the fuel tank shield onto the fuel tank.
19. Attach the evaporative emission (EVAP) canister to the mounting bracket.
20. Lower the transmission jack and remove from under the vehicle.
21. Install the nuts holding the transmission mount to the transmission support. Torque
the nuts to 35 ft-lb (46 Nm).
22. Install the rear propeller shaft into the vehicle.
23. Flush the transmission oil cooler and cooling lines.
24. Connect the transmission oil cooler lines to the transmission.
25. Lower the vehicle.
26. Attach the filler tube to the right side of the engine. Torque the nut to 71 ft-lb (10
Nm).
27. Connect the negative battery cable.
28. Refill the transmission with DEXRON® VI transmission fluid and inspect for leaks.
29. Reset the transmission adaptive pressure (TAP) values.
5.3L & 6.0L Engines
To Remove:
1. Disconnect the negative battery cable.
2. Lift the vehicle.
3. Drain the fluid from the transmission.
4. Remove the rear propeller shaft from the vehicle.
5. Use a jack to support the transmission.
6. Remove the nuts holding the transmission mount to the transmission support.