Sierra 1500 4WD V6-4.3L (2008)
6. Use the J 44247 to complete the seating of the retaining feet that lock the connector (1) into the transmission case.
7. Install the detent spring assembly (2) onto the control valve assembly. Confirm that the roller of the detent spring assembly rests on the detent
lever (1).
8. Attach the IMS connector on the internal harness to the IMS.
9. Install 2 detent spring bolts (3).
Tighten the bolts to 12 N.m (108 lb in).
10. Install the oil pan and transmission internal oil filter. Refer to Oil Pan Replacement (See: Fluid Pan/Service and Repair/Allison - Automatic
Transmission) .
11. Connect the external wiring harness to the transmission main connector.
Important: The FastLearn, adapt, procedure must be performed. This can be done in 1 step using a scan tool. If this procedure is not
done, the TCM adaptive values will be at the settings that it learned for the old components and will be in slow adaptive mode. Under
these conditions, it will take an unacceptably long time for the adaptive values to converge to levels suitable for the new transmission.
