Chevrolet Silverado / GMC Sierra. Manual — part 773

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