Chevrolet Silverado / GMC Sierra. Manual - part 773
25. Install the transmission crossmember. Refer to Transmission Support Crossmember
Replacement (2WD 2500 HD/3500) or Transmission Support Crossmember
Replacement (2WD 1500/2500) or Transmission Support Crossmember Replacement
(4WD 1500/2500) or Transmission Support Crossmember Replacement (4WD 2500
HD/3500) .
26. Remove the transmission jack.
27. Install the rear propeller shaft. Refer to One-Piece Propeller Shaft Replacement or Two-
Piece Propeller Shaft Replacement .
Fig. 105: View Of Oil Cooling Lines & Bolt
Courtesy of GENERAL MOTORS CORP.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
28. Connect the oil cooler lines to the transmission. Refer to Transmission Fluid Cooler
Hose/Pipe Replacement
29. Lower the vehicle.
30. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and
Connection (w/Single Battery) or Battery Negative Cable Disconnection and
Connection (w/Auxiliary Battery) or Battery Negative Cable Disconnection and
Connection (w/Dual Batteries)
31. Fill the transmission to the proper level. Refer to Fluid Capacity Specifications .
32. Reset the TAP values. Refer to Transmission Adaptive Functions (TCM) .
OFF-VEHICLE REPAIR INFORMATION
TORQUE CONVERTER REMOVAL AND HOLDING FIXTURE INSTALLATION
(6L80/6L90)
IMPORTANT: It is recommended that transmission adaptive pressure (TAP)
information be reset.
Resetting the TAP values using a scan tool will erase all
learned values in all cells. As a result, the engine control
module (ECM), powertrain control module (PCM), or
transmission control module (TCM) will need to relearn TAP
values. Transmission performance may be affected as new
TAP values are learned.
NOTE:
For ON-VEHICLE repair information, see ON-VEHICLE REPAIR
INFORMATION. OFF-VEHICLE repair information is covered below.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Fig. 106: Torque Converter Removal and Holding Fixture Installation (6L80/6L90)
Courtesy of GENERAL MOTORS CORP.
Callout
Component Name
1
Torque Converter Assembly
2
Transmission Case Assembly
Tip:
1. Rotate the transmission so that the converter
housing is up and secure with locking pin.
2. Allow any remaining transmission fluid to drain
from the case extension.
Special Tools
DT 47605 Holding Fixture Adapter. See Special
Tools.
J 3289-20 Holding Fixture Base Assembly. See
Special Tools.
J 8763-B Holding Fixture. See Special Tools.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
CASE EXTENSION ASSEMBLY REMOVAL
Fig. 107: Case Extension Assembly Removal
Courtesy of GENERAL MOTORS CORP.
TRANSMISSION FLUID PAN, FILTER AND ELECTRICAL CONNECTOR
PASSAGE SLEEVE REMOVAL (6L80)
Callout
Component Name
1
Bolt M10 x 40 (Quantity: 6)
2
Case Extension
3
Case Extension Seal
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado