Sierra 3500 4WD V8-6.6L DSL Turbo VIN 2 (2004)
Valve Body: Service and Repair
Automatic Transmission - Allison
Control Valve Body Replacement
Control Valve Body Replacement
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Tools Required
-
J 44257 Wiring Harness Connector Remover
-
J 44247 Internal Wiring Harness Installer
Removal Procedure
1. Caution:
Refer to Battery Disconnect Caution in Service Precautions.
Disconnect the external wiring harness from the main transmission connector. Use the J 44257, if connector is not easily accessible.
2. Remove the oil pan and suction filter.
3. Important:
The transmission main connector is actually one end of the internal harness that protrudes through the main housing.
Place a 30 mm (1 3/16 inch) 12-point deep socket or box-end (2) over the connector (1).
4. Push inward on the socket or wrench to release the retainer feet that attach the connector (1) to the main housing.
5. Remove the wrench. Push inward on the electrical connector to separate it from the main housing. This allows the internal wiring harness to
remain with the control valve assembly as it is removed.
